Kinda funny that their "cost-vs-performance" chart looks the same as the one for Composer 2.5[1], except that it includes Composer 2.5 at a completely different spot.
What are the chances that CursorBench ranks Cursor's model highest, and Cognition's bench ranks Cognition's model highest? Both are to be RL'd from Kimi as a base model, BTW.
I'd posit that it's not deliberate deception, but for both companies their training data and benchmarks come from the same dataset (Devin/Cursor interaction logs) so they naturally overfit.
I actually started typing the same point that the chances are actually high because of train/eval overlap then realised you answered your own question with that same observation.
It is interesting though!
Perhaps in some way this means we should decide which eval set aligns best with our taste?
Back to the blog post. This is an excellent write up of an excellent technical achievement.
I have a lot of respect for the Cognition/Devin (always "Windsurf" to me) and Cursor teams.
I found it interesting - but justified - that they referred to themselves as a foundation lab rather than a dev tools company.
Agreed on the likely mechanism. I'm not sure "overfitting" is even the right description. These things are of course absurdly complicated, and evaluating their quality down to a single number involves a lot of judgement and trade-offs. I think it's more "you get what you measure" which is true in human organizations too. Define a KPI and people work hard to make it go up, even if it's not quite right or has bad side-effects.
At this point I barely put any value in any of the benchmarks. I just use the models for coding (and related things like software product design/planning/ideation/etc.) tasks and judge them subjectively, and also see how others judge them subjectively on HN and Twitter.
It honestly seems like there's not a great way to currently benchmark AI.
The ideal way to run these benchmarks would be to give a 3rd party the model to run in an isolated environment so the prompts don't make their way back to the AI engineers.
That seems doable for open weight models, but not for private models.
We need more models that optimize for coding and that can be cheaper than frontier models, like what SWE 1.7 and composer 2.5 are trying to do. I don't think there's an effort to make something GLM-5.2 level but focused only on coding.
This isn't as easy as it sounds. Every ML model is struggling to balance between generalization and test performance.
Taking a good model like GLM5.2 and just fine tuning it on coding can decrease real world performance due to mechanics like catastrophic forgetting. There is also other interesting behaviors were training on a broad training set can improve coding performance because there is positive transfer.
There is 100% an effort to make solid coding focused models, but it is very hard to do that without including capabilities across a broad set of adjacent tasks.
Defining what "coding" means now, and how quickly we fall off the capability cliff seems increasingly important.
Today my "coding" sessions often enough begin with real life problems, where I discuss domain or inter-domain things, ranging from business, economics, psychology, etc. Being able to do all of that with one model is something I am willing to pay a premium for.
Of course not having to pay the premium, because the routing is smart or whatever, would be great. I just don't want to have to think about it.
> Today my "coding" sessions often enough begin with real life problems
intuition is that your sessions consists of 10% of domain related reasoning, and 90% of code plumbing. Those 90% could be moved to cheap and efficient specialized and focused model.
Possibly! It's just hard to reason about from the outside. When does the model benefit from all the ambient knowledge? Idk.
Regardless, it's fairly obvious to me that none of what I do now will require "frontier models" for much longer. Models are getting better more quickly than my problems are getting harder.
OpenAI do have codex models, which are half the price. I haven't used them enough to comment on the quality though.
I remember them saying a few years ago that, they didn't think it was worth specializing models for code, because their general purpose models kept beating them. I guess they changed their mind? Since they did start making codex models again.
I use this model. It's pretty good but not Opus 4.8 or Fable levels obviously. I'm really hoping we get more models like it (and better) soon. I run it locally and it's great that way.
Qwen3-coder-next is very usable. But I don't think it's as good as Qwen3.6-27B (though it does run faster on my hardware). It would be great if we could get a Qwen3.7-coder, but I'm not going to hold my breath.
Cognition... oh what a ride... We were customers when they acquired Windsurf, stopped offering customer support, raised prices, dismantled the brand, and raised prices again. We are not customers anymore. Benchmarks are not the only thing to worry about when you are using models.
Apparently 'free' on the $20/mo Devin plan (presumably within some quota still)
and that is "via Cerebras at 1000 TPS" according to the announcement
I live on Opus 4.8 High and their benchmark scores SWE-1.7 slightly higher ... if at all realistic that sounds like a great deal ... too good to be true?
I’ve unfortunately had to temper my excitement with Cognition’s models/products given the amount of unwarranted hype they created with Devin on first release, but hopefully this is good.
I work with Devin daily (as well as Claude and a few others) and I can attest it's not a cheap product but it's a good one and it saves me a bunch of time.
A company whose first demo was completely fraudulent announces that its model beats GPT-5.5, on its own benchmark? I’m gonna wait a little before I trust this.
This whole company seems to optimize for raising money and impressing VCs. Lying about their products, ignoring consumer market to target enterprise, bragging about how they work their employees like slaves, and writing these posts full of intimidating technical jargon...
This is inevitable when the primary incentive is to raise aggressively. Overall I dont find cognition blogs that jargony, there are definitely worse offenders
To be fair it does seem like most AI startups are now like this (particularly when it comes to constantly mentioning how hard they work and ignoring consumer markets).
Is it just me or does all that* seem pretty tame by today’s standards? Not saying it’s right, but it barely raises eyebrows. Sounds like a pretty typical startup demo.
* Based on the first comment in the link that claims to summarize the video.
I highly respect many people at cognition but yeah that's put a sour taste in my mouth.
I want to work in the AI space on actual AI research, at any part of the stack. Even if I'm developing training infra - as long as people are advancing knowledge of what intelligence could be.
But it seems like either it's big labs or grifters, that's it, and even the big labs, at least publicly, seem very grifty at times. Not like I have the technical chops probably, but still.
Yes, and not only that but you can't even access it via API, you can only use it in Devin (formerly Windsurf).
I'm an OpenCode user, but I'll fall back to Claude Code if I want to use Opus end to end for something, given my company has a subscription. But I'm not using yet another tool and subscription for a model that isn't even winning.
What is the actual per token price? The benchmarks look similar to Grok 4.5 also released today and priced at $2/M input tokens and $6/M output tokens.
The regular one (not the fast variant) is free but slow. The "Lightning" variant (which uses Cerebras and gets supposedly 1000 TPS) costs $12.50/M output, $2.5/M input, $1/M cached input. So it's quite a bit more expensive than SWE 1.6.
and what is actual intelligence per dollar benchmark ???? its useless comparing token/dollar while some model inherently generate more thinking output and cost more despite lower cost
While I am skeptical of the results here, I am very excited for this new trend of making models faster. Running capable models at 1k TPS is more valuable for me than running better models at 30 TPS. I can only imagine the trend continues to move from "let's only make models smarter" to just incremental intelligence gains but with step improvements in speed.
Why? I'm personally on the opposite end. Less babysitting/higher quality means more time goes back to me/the user. 1000tps of bad code means you have to keep validating the output and circling back.
High tps is good for deeper agent thinking loops and openclaw etc. I was running cerebus recently doing some data heavy tasks, it managed to crash the server I was submitting posts to. 6 hour task down to ~1hr
It's a lossy conversion though. "Mistake" is relative to the stated goals and specifications which are often heavily lacking. So unless you write with a high degree of architectural and implementation specificity then it might make very high quality code that is still not what you wanted.
You can ask for a complete feature/app/business. Or you can split up the work into verifiable/testable pieces and rely on a high quality AI to deliver. As time goes by the pieces will get larger as capability grows. I still trust myself and my experience when arch is involved, but AI has been great at tackling lower level stuff. And with Fable I don't really care it takes a while for it to complete, as I know I can trust it a lot more (which is what I personally prefer). Yes, with a 10k tps model you can iterate quickly. But that's not me personally.
But some requirements you don't realize you have until you start building. With a fast model, you can surface those really quickly and have more time to iterate and explore different solutions. With a slower but smarter model, you just hope that what it produces after an hour is what you were imagining.
And yes, with Fable, the chance of that is higher than with SWE/Composer, but in my experience it's not so much higher that the extra time and cost is worth it. But it certainly depends on your goals and what you're building.
So i agree with you, but there's no SOTA model that i don't have to babysit. I'm not going to just throw a large pile of code in there unreviewed, and so what i want is faster iteration on code in logical, reviewable chunks. Ie just like i'd normally write myself; small, logical commits.
Faster iteration means i mentally checkout less and am more involved with the code being created.
My hope is that in the far far future, we can get LLMs so fast that i can work in my IDE like normal and the LLM will just be an extension of autocomplete. I can state a goal, rough out functions, code, etc, and it'll just work around me like a very fast pair programmer / autocomplete.
The chat interface is an intermediate step that frankly i hate. The faster it is the less i wait.
Now for vibe-slop i'm making on the side, yea i don't care about speed. But that's not something i'm employed to do or anything i truly care about. It's a different workflow entirely.
I get it, you just prefer to do things differently
> Faster iteration means i mentally checkout less and am more involved with the code being created.
This is a good point I didn't consider and you're right. More interaction brings you closer to the code.
I still think that this is the opposite of what I personally want. Either I write the code (or a large majority of it), and be fully involved; or be more disconnected but more free to focus on other things. The middle ground removes me from the equation, but also requires me to babysit.
Indeed. For me opus 4.8 is good enough. If only it would be 100 times faster. You could run it in self verification loops much much faster. It sometimes takes 15 minutes for me to complete a simple task. For example configuring AWS agentcore and deploying an agent on it. Takes forever with Claude with constant issues it tries to solve.
Very thankful someone is doing this work! I suspect it will be thankless work for a while: we're not far enough into diminishing gains territory for anything other than the absolute best being worth considering for most people, but I reckon we will be pretty soon. If a year from now swe 2.0 or whatever reaches fable 5 parity for a fraction of the cost, that'll be very attractive indeed!
I really don't want harness lock-in. I am trying to decouple myself from Claude Code now. I love the model of OpenRouter and being able to switch models at will let's your harness focus on your personal tooling and you can easily switch to the flavor of the month LLM with a single slash command instead of rewiring your entire workflow to use a harness to use a model.
I like Cerabras, but I really wish they would make more of their hosted models generally available.
Ironically, Devin Desktop is one of those tools. It supports any harness that supports ACP (which is most of them)—you can use Claude Code, Codex, OpenCode, etc from the Devin Desktop UI.
I'm currently experimenting with OpenSpec[0] as the "framework" and using different subscriptions for different parts of the spec-driven process: Opus via Claude Code for exploration, Devin SWE for building, and GLM 5.2 via the Z.ai Coding Plan for verification. I don't love having to mix and match harnesses, but in practice it's barely more effort than switching models.
Because papers are often referred to by the first author’s name, and often the first author is the primary researcher and therefore deserves the extra credit. When two or more primary authors are equally involved, they’ll often do a random ordering but annotate this so that no one thinks one did more than the others.
I'm looking forward to trying this out. I've been using SWE 1.6 quite a lot for grunt work alongside Opus for higher level planning and tricky stuff - a good combo.
As a (former) Windsurf user I'm pretty happy with the progress of the Cognition/Devin ecosystem after they took over Windsurf, now known as Devin Desktop.
The reality is most people building their own models and providing that alongside SOTA ones don't really care about how great these models are. They just prove that 'hey we are smart enough to build our own models so you can trust us instead of going with a single provider like Claude via Claude Code', also a cheap alternative for cost sensitive/free users - at least this was the case for Windsurf, not sure if Devin Desktop still has that tier. They just need to hillclimb the benchmarks and show something reasonable enough there.
At work I wouldn't want to use anything else. Compared to my salary a Claude subscription (or two) is cheap
For hobby projects I've completely switched to DeepSeek v4 pro. I spend less than on a $10 Claude plan and am not subjected to quota limits (when I have time and motivation, the last thing I want is a 5 hour quota running out). And the difference in model performance is fine for those smaller projects, most of which will end up abandoned or in a state of "good enough" anyways
And for utility tasks, those 30b models are also great.
I'm a big fan of gemma4
Is a lot of money. The majority of people here aren't willing to spend $200/mo for coding unless their little projects provide a comparable value back to them.
For context, I'm paying under $30/year and get GLM-5.2. An extra $2300/year isn't going to get me much better outcomes.
Not true since a few months, genuinely try GLM 5.2 and Minimax M3, especially in adversarial/gating... as a general model, I can agree, but as a coding model, they are not bad, comparable to maybe Opus 4.5 in real usage which is quite impressive.
I use GLM or DS4 to help me draft a better initial prompt with more information that I then give to Sonnet 5/Fable/GPT5.5. While benchmarks show the open models close to frontier level, my experience with them is drastically different. I have high confidence that Fable or GPT will 1 shot solutions.
At least with low level programming languages. They're all very good for webdev stuff.
Imagine how far community might have pushed if 2 past versions of 'morally superior' Anthropic and 'completely Open AI' open sourced their models for the community to build on top of them
Should as in "would it be nice?" - yeah. Should as in they have to? No.
> Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the “Software”), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so
You can do pretty much anything you want with an MIT license.
There is no obligation to do that. I think the landscape would be very different now if one of the big labs had released an earlier “frontier” model under copyleft that requires sharing fine tunes. I hope it still happens.
Dario is convinced that will create SkyNet, and so no, it will never happen. Only the blessed members of the True Church Of Effective Altruism can approach the Ark of the Covenant. The unwashed cannot be trusted.
I've always had mixed feelings about Cognition. Obviously they have some very, very smart people working there (I even know a few), and they do make real products. But at the same time, they've made suspicious marketing claims more than once and even been caught making outright fabricated ones; and while they certainly seem to have shaped up from that, I still find their claims to be in a sort of grey area where they seem to avoid unfavorable comparisons and lean on their own benchmarks. Certainly when I've tried their models they have not been nearly as useful as comparable versions of Claude, GLM, etc. -- though I haven't had a chance to try SWE-1.7 yet.
I think it's a bit odd to show the API prices for competitors when that's not how most people pay for them. I do like that it's provisioned by Cerebras though. I think I'd have leant towards focusing on the TPS.
Kinda funny that their "cost-vs-performance" chart looks the same as the one for Composer 2.5[1], except that it includes Composer 2.5 at a completely different spot.
What are the chances that CursorBench ranks Cursor's model highest, and Cognition's bench ranks Cognition's model highest? Both are to be RL'd from Kimi as a base model, BTW.
I'd posit that it's not deliberate deception, but for both companies their training data and benchmarks come from the same dataset (Devin/Cursor interaction logs) so they naturally overfit.
1. https://cursor.com/blog/composer-2-5
I think it's also telling that they left out the usual hallmarks of the Pareto distribution: GLM 5.2, Qwen 3.7, Minimax M3, and Mimo 2.5
https://arena.ai/leaderboard/code/webdev/pareto
> they left out ... GLM 5.2
They did not.
Good observation.
I actually started typing the same point that the chances are actually high because of train/eval overlap then realised you answered your own question with that same observation.
It is interesting though!
Perhaps in some way this means we should decide which eval set aligns best with our taste?
Back to the blog post. This is an excellent write up of an excellent technical achievement.
I have a lot of respect for the Cognition/Devin (always "Windsurf" to me) and Cursor teams.
I found it interesting - but justified - that they referred to themselves as a foundation lab rather than a dev tools company.
agent lab, not foundation lab
Agreed on the likely mechanism. I'm not sure "overfitting" is even the right description. These things are of course absurdly complicated, and evaluating their quality down to a single number involves a lot of judgement and trade-offs. I think it's more "you get what you measure" which is true in human organizations too. Define a KPI and people work hard to make it go up, even if it's not quite right or has bad side-effects.
At this point I barely put any value in any of the benchmarks. I just use the models for coding (and related things like software product design/planning/ideation/etc.) tasks and judge them subjectively, and also see how others judge them subjectively on HN and Twitter.
I use benchmarks…
…that are my own private internal suite on my own code bases where I can judge the output properly
I also measure wall clock time to completion which has been a surprising separator in practice.
On artificialanalysis.ai, Kimi 2.7 Code is way worse than GLM 5.2 at everything (general intelligence, coding, agentic tasks).
But here, both Kimi 2.7 and its derivative SWE-1.7 are ahead of GLM 5.2. This tells me the benchmarks they use are cherry-picked.
Composer 2.5 is worse than both; I use it all day for simple stuff. It's Kimi 2.6 in a new outfit.
Likely benchmaxxed. You see it in Qwen and other smaller models all the time.
> This tells me the benchmarks they use are cherry-picked.
Which benchmarks would you have chosen instead, and why?
It honestly seems like there's not a great way to currently benchmark AI.
The ideal way to run these benchmarks would be to give a 3rd party the model to run in an isolated environment so the prompts don't make their way back to the AI engineers.
That seems doable for open weight models, but not for private models.
Okay, let's give software engineers a break for a bit and focus on obsoleting other high-linguistic context occupations.
And to do that you’ll need development so until we’re all out of a job they’ll keep pushing. Once automating is automated it’s done.
Any day now... Just a bit more space in the context window, trust me bro.
software and agentic workflows will obsolete those things
RL environments building on top of each other will get these models there
needs people doing software development lifecycles to figure it out and implement
Like diplomacy? heh
I like to use SWE-1.6 for quick help with git. For instance:
review the top stash and tell me what's in it (grouped appropriately)
1.6 does this fine nearly instantly.
1.7 tried for 17s before I killed it
We need more models that optimize for coding and that can be cheaper than frontier models, like what SWE 1.7 and composer 2.5 are trying to do. I don't think there's an effort to make something GLM-5.2 level but focused only on coding.
This isn't as easy as it sounds. Every ML model is struggling to balance between generalization and test performance.
Taking a good model like GLM5.2 and just fine tuning it on coding can decrease real world performance due to mechanics like catastrophic forgetting. There is also other interesting behaviors were training on a broad training set can improve coding performance because there is positive transfer.
There is 100% an effort to make solid coding focused models, but it is very hard to do that without including capabilities across a broad set of adjacent tasks.
As you say- LLMs are fundamentally good because of their generalism. Distillation, ablation, ft all tend to be hacky and in some way hurt the model
Defining what "coding" means now, and how quickly we fall off the capability cliff seems increasingly important.
Today my "coding" sessions often enough begin with real life problems, where I discuss domain or inter-domain things, ranging from business, economics, psychology, etc. Being able to do all of that with one model is something I am willing to pay a premium for.
Of course not having to pay the premium, because the routing is smart or whatever, would be great. I just don't want to have to think about it.
> Today my "coding" sessions often enough begin with real life problems
intuition is that your sessions consists of 10% of domain related reasoning, and 90% of code plumbing. Those 90% could be moved to cheap and efficient specialized and focused model.
Possibly! It's just hard to reason about from the outside. When does the model benefit from all the ambient knowledge? Idk.
Regardless, it's fairly obvious to me that none of what I do now will require "frontier models" for much longer. Models are getting better more quickly than my problems are getting harder.
but that is not model problem
most agentic coding app can use powerful model for planning/reasoning then use "budget" model to do ground work
Qwen was doing something like this with their coder models. But alas, they seem not to be releasing those anymore. Last one was Qwen3-coder-next.
Its crazy that OpenAI and Anthropic themselves aren't doing that. No attempts at reducing inference cost for code as far as I know from them.
OpenAI do have codex models, which are half the price. I haven't used them enough to comment on the quality though.
I remember them saying a few years ago that, they didn't think it was worth specializing models for code, because their general purpose models kept beating them. I guess they changed their mind? Since they did start making codex models again.
They also stopped making them again.
My speculation is that frontier models are MoE, and they just have some number of experts for coding.
I use this model. It's pretty good but not Opus 4.8 or Fable levels obviously. I'm really hoping we get more models like it (and better) soon. I run it locally and it's great that way.
Qwen3-coder-next is very usable. But I don't think it's as good as Qwen3.6-27B (though it does run faster on my hardware). It would be great if we could get a Qwen3.7-coder, but I'm not going to hold my breath.
And make it run locally!
Cognition... oh what a ride... We were customers when they acquired Windsurf, stopped offering customer support, raised prices, dismantled the brand, and raised prices again. We are not customers anymore. Benchmarks are not the only thing to worry about when you are using models.
https://devin.ai/pricing
Apparently 'free' on the $20/mo Devin plan (presumably within some quota still)
and that is "via Cerebras at 1000 TPS" according to the announcement
I live on Opus 4.8 High and their benchmark scores SWE-1.7 slightly higher ... if at all realistic that sounds like a great deal ... too good to be true?
The "Lightning" (Cerebras) variant isn't free, only the regular one, which runs closer to 50 TPS in my experience with SWE 1.6.
The 1000 TPS shows for me as "SWE 1.7 Lightning" and took 14% of my daily quota in one prompt on the $20 plan.
But the normal speed one seems to be free or with very generous limits.
I’ve unfortunately had to temper my excitement with Cognition’s models/products given the amount of unwarranted hype they created with Devin on first release, but hopefully this is good.
I work with Devin daily (as well as Claude and a few others) and I can attest it's not a cheap product but it's a good one and it saves me a bunch of time.
A company whose first demo was completely fraudulent announces that its model beats GPT-5.5, on its own benchmark? I’m gonna wait a little before I trust this.
This whole company seems to optimize for raising money and impressing VCs. Lying about their products, ignoring consumer market to target enterprise, bragging about how they work their employees like slaves, and writing these posts full of intimidating technical jargon...
This is inevitable when the primary incentive is to raise aggressively. Overall I dont find cognition blogs that jargony, there are definitely worse offenders
To be fair it does seem like most AI startups are now like this (particularly when it comes to constantly mentioning how hard they work and ignoring consumer markets).
> it does seem like most AI startups are now like this
Remember when AGI was going to replace all jobs in 6 months? It's always been like that.
Link for this?
https://news.ycombinator.com/item?id=40008109
Is it just me or does all that* seem pretty tame by today’s standards? Not saying it’s right, but it barely raises eyebrows. Sounds like a pretty typical startup demo.
* Based on the first comment in the link that claims to summarize the video.
I highly respect many people at cognition but yeah that's put a sour taste in my mouth.
I want to work in the AI space on actual AI research, at any part of the stack. Even if I'm developing training infra - as long as people are advancing knowledge of what intelligence could be.
But it seems like either it's big labs or grifters, that's it, and even the big labs, at least publicly, seem very grifty at times. Not like I have the technical chops probably, but still.
> "A company whose first demo was completely fraudulent"
Could you expand on this?
Would love to see these companies use benchmarks done by third parties.
they are right there? it shows swe-bench multilingual and terminal bench
What happened ?
Not finding anything about this while searching huggingface: https://huggingface.co/search/full-text?q=SWE-1.7 i assume this is another closed source model?
Open weight models should have GPL-like license where it says if you train model on it, it needs to be open weight as well.
Yes, and not only that but you can't even access it via API, you can only use it in Devin (formerly Windsurf).
I'm an OpenCode user, but I'll fall back to Claude Code if I want to use Opus end to end for something, given my company has a subscription. But I'm not using yet another tool and subscription for a model that isn't even winning.
What is the actual per token price? The benchmarks look similar to Grok 4.5 also released today and priced at $2/M input tokens and $6/M output tokens.
The regular one (not the fast variant) is free but slow. The "Lightning" variant (which uses Cerebras and gets supposedly 1000 TPS) costs $12.50/M output, $2.5/M input, $1/M cached input. So it's quite a bit more expensive than SWE 1.6.
and what is actual intelligence per dollar benchmark ???? its useless comparing token/dollar while some model inherently generate more thinking output and cost more despite lower cost
While I am skeptical of the results here, I am very excited for this new trend of making models faster. Running capable models at 1k TPS is more valuable for me than running better models at 30 TPS. I can only imagine the trend continues to move from "let's only make models smarter" to just incremental intelligence gains but with step improvements in speed.
Why? I'm personally on the opposite end. Less babysitting/higher quality means more time goes back to me/the user. 1000tps of bad code means you have to keep validating the output and circling back.
High tps is good for deeper agent thinking loops and openclaw etc. I was running cerebus recently doing some data heavy tasks, it managed to crash the server I was submitting posts to. 6 hour task down to ~1hr
id rather iterate multiple times than wait 15 minutes to notice it made a mistake.
Again, my point is exactly the opposite. Higher quality implies a mistake isn't made in a significant % of cases.
It's a lossy conversion though. "Mistake" is relative to the stated goals and specifications which are often heavily lacking. So unless you write with a high degree of architectural and implementation specificity then it might make very high quality code that is still not what you wanted.
You can ask for a complete feature/app/business. Or you can split up the work into verifiable/testable pieces and rely on a high quality AI to deliver. As time goes by the pieces will get larger as capability grows. I still trust myself and my experience when arch is involved, but AI has been great at tackling lower level stuff. And with Fable I don't really care it takes a while for it to complete, as I know I can trust it a lot more (which is what I personally prefer). Yes, with a 10k tps model you can iterate quickly. But that's not me personally.
But some requirements you don't realize you have until you start building. With a fast model, you can surface those really quickly and have more time to iterate and explore different solutions. With a slower but smarter model, you just hope that what it produces after an hour is what you were imagining.
And yes, with Fable, the chance of that is higher than with SWE/Composer, but in my experience it's not so much higher that the extra time and cost is worth it. But it certainly depends on your goals and what you're building.
So i agree with you, but there's no SOTA model that i don't have to babysit. I'm not going to just throw a large pile of code in there unreviewed, and so what i want is faster iteration on code in logical, reviewable chunks. Ie just like i'd normally write myself; small, logical commits.
Faster iteration means i mentally checkout less and am more involved with the code being created.
My hope is that in the far far future, we can get LLMs so fast that i can work in my IDE like normal and the LLM will just be an extension of autocomplete. I can state a goal, rough out functions, code, etc, and it'll just work around me like a very fast pair programmer / autocomplete.
The chat interface is an intermediate step that frankly i hate. The faster it is the less i wait.
Now for vibe-slop i'm making on the side, yea i don't care about speed. But that's not something i'm employed to do or anything i truly care about. It's a different workflow entirely.
I get it, you just prefer to do things differently
> Faster iteration means i mentally checkout less and am more involved with the code being created.
This is a good point I didn't consider and you're right. More interaction brings you closer to the code.
I still think that this is the opposite of what I personally want. Either I write the code (or a large majority of it), and be fully involved; or be more disconnected but more free to focus on other things. The middle ground removes me from the equation, but also requires me to babysit.
Indeed. For me opus 4.8 is good enough. If only it would be 100 times faster. You could run it in self verification loops much much faster. It sometimes takes 15 minutes for me to complete a simple task. For example configuring AWS agentcore and deploying an agent on it. Takes forever with Claude with constant issues it tries to solve.
Very thankful someone is doing this work! I suspect it will be thankless work for a while: we're not far enough into diminishing gains territory for anything other than the absolute best being worth considering for most people, but I reckon we will be pretty soon. If a year from now swe 2.0 or whatever reaches fable 5 parity for a fraction of the cost, that'll be very attractive indeed!
Would have been worth a consideration if it could have been used beyond it's own harness. Unfortunately, doesn't seem to be the case.
https://x.com/theodormarcu/status/2074896486047834380
I really don't want harness lock-in. I am trying to decouple myself from Claude Code now. I love the model of OpenRouter and being able to switch models at will let's your harness focus on your personal tooling and you can easily switch to the flavor of the month LLM with a single slash command instead of rewiring your entire workflow to use a harness to use a model.
I like Cerabras, but I really wish they would make more of their hosted models generally available.
Harness-wrapper tools that support multiple harnesses and allow sharing workspace features (skills, slash commands, etc.) between them will be meta.
Ironically, Devin Desktop is one of those tools. It supports any harness that supports ACP (which is most of them)—you can use Claude Code, Codex, OpenCode, etc from the Devin Desktop UI.
I'm currently experimenting with OpenSpec[0] as the "framework" and using different subscriptions for different parts of the spec-driven process: Opus via Claude Code for exploration, Devin SWE for building, and GLM 5.2 via the Z.ai Coding Plan for verification. I don't love having to mix and match harnesses, but in practice it's barely more effort than switching models.
[0]: https://openspec.dev/
Is that surprising? It is standard "embrace, extend, extinguish" from a company not in a strong enough position to do the third one.
Ugh, that changes everything. If I wanted an arranged marriage I could go back to Claude Code.
Unrelated: what's the point of "*equal contribution"? Why would someone specify this
Because papers are often referred to by the first author’s name, and often the first author is the primary researcher and therefore deserves the extra credit. When two or more primary authors are equally involved, they’ll often do a random ordering but annotate this so that no one thinks one did more than the others.
Interesting. Thank you
Feels like they discovers that if you build your own benchmark, you can win it
Pretty sure most benchmarks are being gamed by people training on the test set deliberately or accidentally anyway.
Heads up to anyone else curious, I installed the Devin CLI and SWE-1.7 is not currently available there.
Wait Devin has a CLI?
Time to support it in my agent IDE just like Cursor's...
I'm looking forward to trying this out. I've been using SWE 1.6 quite a lot for grunt work alongside Opus for higher level planning and tricky stuff - a good combo.
As a (former) Windsurf user I'm pretty happy with the progress of the Cognition/Devin ecosystem after they took over Windsurf, now known as Devin Desktop.
How do i use it from opencode/openrouter?!
These models are never as good, the benchmarks dont tell the full story
The reality is most people building their own models and providing that alongside SOTA ones don't really care about how great these models are. They just prove that 'hey we are smart enough to build our own models so you can trust us instead of going with a single provider like Claude via Claude Code', also a cheap alternative for cost sensitive/free users - at least this was the case for Windsurf, not sure if Devin Desktop still has that tier. They just need to hillclimb the benchmarks and show something reasonable enough there.
Benchmarks are just vibes with error bars... wake me up when it survives a week on a real codebase without hallucinating a package that doesn't exist.
Funny, the cheerleading at HN for leading Chinese models, but a non Chinese lab (building on top of a Chinese model) gets dissed here.
It's simple: close weights = not welcome.
It's almost as if HN users aren't all the same.
all the open source models are a waste of time relative to the bleeding edge from openai/anthropic
At work I wouldn't want to use anything else. Compared to my salary a Claude subscription (or two) is cheap
For hobby projects I've completely switched to DeepSeek v4 pro. I spend less than on a $10 Claude plan and am not subjected to quota limits (when I have time and motivation, the last thing I want is a 5 hour quota running out). And the difference in model performance is fine for those smaller projects, most of which will end up abandoned or in a state of "good enough" anyways
And for utility tasks, those 30b models are also great. I'm a big fan of gemma4
ive just got better things to do with my life than fuss with an inferior model. its like why hire a dumb employee over a smart one
I think you misspelled "I've got plenty of money".
200 bucks a month?
Is a lot of money. The majority of people here aren't willing to spend $200/mo for coding unless their little projects provide a comparable value back to them.
For context, I'm paying under $30/year and get GLM-5.2. An extra $2300/year isn't going to get me much better outcomes.
Not true since a few months, genuinely try GLM 5.2 and Minimax M3, especially in adversarial/gating... as a general model, I can agree, but as a coding model, they are not bad, comparable to maybe Opus 4.5 in real usage which is quite impressive.
I use GLM or DS4 to help me draft a better initial prompt with more information that I then give to Sonnet 5/Fable/GPT5.5. While benchmarks show the open models close to frontier level, my experience with them is drastically different. I have high confidence that Fable or GPT will 1 shot solutions.
At least with low level programming languages. They're all very good for webdev stuff.
yeah but why waste your time on these models, just use the one that gets the better results
I actively prefer GLM-5.2 for some tasks. For simple tasks the results are just as good as e.g. Opus, and it produces results significantly faster.
Because you can get them from more trustworthy providers or with hardware encryption.
i trust anthropic/openai with my data far more than some random startup.
I was going to respond until I saw your account name lol.
haha i outsource my thinking to the smartest model
Open source for the win!
Imagine how far community might have pushed if 2 past versions of 'morally superior' Anthropic and 'completely Open AI' open sourced their models for the community to build on top of them
Is this open source? I can't find a link to download the weights.
It's based on an open weight model (Kimi 2.7) so shouldn't it also be open weight?
> so shouldn't it also be open weight?
Should as in "would it be nice?" - yeah. Should as in they have to? No.
> Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so
You can do pretty much anything you want with an MIT license.
There is no obligation to do that. I think the landscape would be very different now if one of the big labs had released an earlier “frontier” model under copyleft that requires sharing fine tunes. I hope it still happens.
Dario is convinced that will create SkyNet, and so no, it will never happen. Only the blessed members of the True Church Of Effective Altruism can approach the Ark of the Covenant. The unwashed cannot be trusted.
Rationalism and EA is Scientology for the Bay Area.
Not open source. Also, not available beyond it's own harness.
I've always had mixed feelings about Cognition. Obviously they have some very, very smart people working there (I even know a few), and they do make real products. But at the same time, they've made suspicious marketing claims more than once and even been caught making outright fabricated ones; and while they certainly seem to have shaped up from that, I still find their claims to be in a sort of grey area where they seem to avoid unfavorable comparisons and lean on their own benchmarks. Certainly when I've tried their models they have not been nearly as useful as comparable versions of Claude, GLM, etc. -- though I haven't had a chance to try SWE-1.7 yet.
I think it's a bit odd to show the API prices for competitors when that's not how most people pay for them. I do like that it's provisioned by Cerebras though. I think I'd have leant towards focusing on the TPS.
And yet when I use swe it feels like massive shit
if you are still using these products in 2026 you are really a shit engineer