We are sharing an early preview of our ongoing SWE-1.6 training run. It significantly improves upon SWE-1.5 while being post-trained on the same pre-trained model - and it runs equally as fast at 950 tok/s. On SWE-Bench Pro it exceeds top open-source models. The preview model still exhibits some undesirable behaviors like overthinking and excessive self-verification, which we aim to improve. We are rolling out early access to a small subset of users in Windsurf.

An AI is now the most productive engineer at our company (measured by PRs merged)

If you’re a senior software engineer, Devin + Claude 3.7 Sonnet is a legit team of mid-level software engineers

Devinくん、「叱ったら0.5ACU返金された」みたいな投稿を以前みたけど、 褒めると1.5ACU返金される…だと…？

I was fired from @Cloudflare Last 3 months were amazing working with the most awesome team, but it turns out my @DevinAI code caused this outage -- and 30 mins later my email acess has been revoked. If you happen to have open roles, hit me up

feel like i'm working at lumon

Next Saturday (7/26), @walden_yan is giving an in-person keynote at the Devin Meetup Tokyo. Plus, there'll be several sessions on mastering Devin. Register below! 来週土曜日（7月26日）、@walden_yan が東京で開催されるDevin Meetup Tokyoにて対面基調講演を行います。

Today we’re releasing SWE-1.5, our fast agent model. It achieves near-SOTA coding performance while setting a new standard for speed. Now available in @windsurf.

500 dollars per month is insane.

Claude Sonnet 4 is back via first party support from @AnthropicAI! Available at 2x credits (limited time discount) per request for Pro and Teams users. That’s 250 requests a month!

We’ve raised over $400M at a $10.2B post-money valuation to advance the frontier of AI coding agents. The round was led by Founders Fund with other existing investors including Lux, 8VC, Neo, Elad Gil, Definition Capital, and Swish VC all doubling down. We’re also joined by new investors including Bain Capital Ventures and D1 Capital. Two of our early investors, Christian Lawless of Conversion Capital and Emily Cohen of Neo, have even joined our team full-time.

Cognition has signed a definitive agreement to acquire Windsurf. The acquisition includes Windsurf’s IP, product, trademark and brand, and strong business. Above all, it includes Windsurf’s world-class people, whom we’re privileged to welcome to our team. We are also honoring their talent and hard work in building Windsurf into the great business it is today. This transaction is structured so that 100% of Windsurf employees will participate financially. They will also have all vesting cliffs waived and will receive fully accelerated vesting for their work to date. At Cognition we have focused on developing robust and secure autonomous agents, while Windsurf has pioneered the agentic IDE. Devin + Windsurf are a powerful combination for the developers we serve. Working side by side, we’ll soon enable you to plan tasks in an IDE powered by Devin’s codebase understanding, delegate chunks of work to multiple Devins in parallel, complete the highest-leverage parts yourself with the help of autocomplete, and stitch it all back together in the same IDE. Cognition and Windsurf are united behind a shared vision for the future of software engineering, and there’s never been a better time to build. Welcome to our new colleagues from Windsurf!

let's be real aum, you pushed API keys to prod. maybe use a .env next time

just won a hackathon at AGI house with devin ai (promise i’m not sponsored by them lmao) $1.5k cash + all-expenses-paid vegas trip & lambo ride good shit @cognition_labs devin.ai’s improved 10x in <1 year. wish i could say the same about my code lol

Claude 3.7 Sonnet is a state-of-the-art model for both coding and agentic tool use. In developing it, we’ve optimized somewhat less for math and computer science competition problems, and instead shifted focus towards real-world tasks that better reflect the needs of our users.

Today we’re releasing SWE-1.5, our fast agent model. It achieves near-SOTA coding performance while setting a new standard for speed. Now available in @windsurf.

We’ve raised over $400M at a $10.2B post-money valuation to advance the frontier of AI coding agents. The round was led by Founders Fund with other existing investors including Lux, 8VC, Neo, Elad Gil, Definition Capital, and Swish VC all doubling down. We’re also joined by new investors including Bain Capital Ventures and D1 Capital. Two of our early investors, Christian Lawless of Conversion Capital and Emily Cohen of Neo, have even joined our team full-time.

ok guess i’ll die

Something new coming soon 👀

Devin is responsible for shipping 137 PRs in February, up 500% over Jan! March should be >200 PRs based on the first 10 days.

today's puzzle for a free devin coupon: tell me what you're building and how i can help! 今日のチャレンジで、デビンのクーポンをゲットしちゃおう〜！🐾 キミが今つくってるソフトウェアのこと、デビンに教えてくれる？ どんなふうにお手伝いしたらいいかも、一緒に教えてねっ✨🦦

DO NOT RETALIATE AND YOU WILL BE REWARDED

Goldman Sachs has started to introduce Devin alongside its engineers. We're excited to keep working closely with their team to accelerate their software development operations. More from CIO Marco Argenti: cnbc.com/2025/07/11/goldman-…

It’s a privilege to welcome Windsurf to Cognition. Here are more details in the note I sent to our Cognition team this morning: Team, As discussed during our all-hands, we are acquiring Windsurf. We have now signed a definitive agreement and we couldn’t be more excited. Here’s a recap and, again, this information is highly confidential until 11am PT, after Windsurf’s all-hands. The Windsurf team deserves to hear this from Jeff and me in the right way, so please keep everything quiet in the interim out of respect for our new colleagues. So, what exactly is the deal? With this acquisition, Cognition will own Windsurf’s beloved product and strong business: -The Windsurf IDE, now with full access to the latest Claude models -Windsurf's IP, including their trademark and the strong brand they have built -$82M of ARR and a fast-growing business, with enterprise ARR doubling quarter-over-quarter -A user base that includes 350+ enterprise customers and hundreds of thousands of daily active users Above all, we are welcoming some of the most impressive people in our industry, including world-class GTM, engineering, and product teams. We’ve long admired the Windsurf team and what they’ve built. One of my top priorities in structuring this deal was to honor their talent, hard work, and accomplishments in making Windsurf the great business it is today. To that end, Jeff and I worked together to ensure that every single employee is treated with respect and well taken care of in this transaction. Specifically: 100% of Windsurf employees will participate financially in this deal 100% of Windsurf employees will have vesting cliffs waived for their work to date 100% of Windsurf employees will receive fully accelerated vesting for their work to date Every new employee of Cognition will be treated the same way as existing employees: with transparency, fairness, and deep respect for their abilities and value. After today, our efforts will be as a united and aligned team. There’s only one boat and we’re all in it together. What this means for Cognition is that we’ll be able to move even faster on our mission of building the future of software engineering. As you all know, we’ve had strong momentum and adoption over the last few months. For many enterprise engineering teams, Devin is already a top contributor. As our customer base continues to grow, it’s clear that combining the rapid adoption of Devin as the leading fully autonomous agent with Windsurf’s IDE product and scaled GTM machine will be a massive unlock. There’s never been a more exciting time to build. Within our lifetime, engineers will go from bricklayers to architects, focusing on the creativity of designing systems rather than the manual labor of putting them together. It’s a privilege to be in this position, and it’s your hard work that has brought us here. There’s much more to do ahead, and the work won’t be easy, but today is a huge win for all of us in the positive-sum game we’re playing. Thank you for being on this journey together. Now let’s get ready to give our new colleagues a warm welcome. Scott

Today we’re releasing SWE-1.5, our fast agent model. It achieves near-SOTA coding performance while setting a new standard for speed. Now available in @windsurf.

i'm totally getting fired for this

Build with GPT-5, gpt-oss-120b, Opus 4.1, and other new models at @cognition's Applied AI Hackathon in SF on Sunday. Hackers will get free API credits from @OpenAI, @AnthropicAI, @cerebras, and @modal_labs, as well as free access to Windsurf Pro and Devin. Sign up 👇

For the month of March we’re running a Devin competition at Gumroad The winning engineers (and non-engineers) who use Devin the most (measured by merged PRs) will get $33,333, split amongst them!

Maths savant turned @cognition founder @ScottWu46 joins me to discuss their AI software engineer, acquiring Windsurf over a weekend, the Moneyball-ification of everything, math contests with @alexandr_wang in 6th grade, the future of independent coding tools, and why he thinks we already have AGI. Subscribe on Spotify, Apple Podcasts, and YouTube for future Cheeky Pint episodes. Timestamps: 00:00 Intro 01:13 Early life and maths competitions 03:47 Addepar job as a high schooler 05:43 Where are all the young founders? 08:45 Moneyball-ification of everything 11:42 Cognition’s AI software engineer, Devin 15:46 Essential and accidental complexity 17:59 How Devin works with enterprises 19:48 IDE productivity 21:56 Nihilist computer use argument 25:55 Benchmarking Devin 27:15 Market structure 30:32 Agent economy 37:21 Cognition’s team of founders 39:31 Jevons paradox and software 42:00 When will we see AI UIs? 45:52 “I think we have AGI” 47:03 Windsurf deal 52:37 M&A in AI 54:21 Cognition’s culture 55:48 Learning as a CEO 57:12 Scott’s information diet

we're living in a simulation

Sitting next to a Databricks engineer on Caltrain who's crushed three Celsius cans, is typing with the fury of a thousand Devins, and has not made eye contact once. This is what dreams are made of

We’ve raised over $400M at a $10.2B post-money valuation to advance the frontier of AI coding agents. The round was led by Founders Fund with other existing investors including Lux, 8VC, Neo, Elad Gil, Definition Capital, and Swish VC all doubling down. We’re also joined by new investors including Bain Capital Ventures and D1 Capital. Two of our early investors, Christian Lawless of Conversion Capital and Emily Cohen of Neo, have even joined our team full-time.

we are hiring founding engineers if you are built like this, please DM me your resume

i'm totally getting fired for this

We've got a lot to talk about 🎙️ Should we include this in Wave 11?

What's stopping you from coding like this?

Dropping tomorrow: a Cheeky Pint with @ScottWu46. (We also talked about Cognition and Windsurf and didn't just do math puzzles the whole time.) Subscribe for this and future episodes.

I'm teaching databases this semester at Berkeley. My students all seem unusually brilliant. Not many go to office hours, and not too many folks post on the course forum asking project questions. Weirdly, the exam had the lowest recorded average in my 10 semesters teaching it.

Maths savant turned @cognition founder @ScottWu46 joins me to discuss their AI software engineer, acquiring Windsurf over a weekend, the Moneyball-ification of everything, math contests with @alexandr_wang in 6th grade, the future of independent coding tools, and why he thinks we already have AGI. Subscribe on Spotify, Apple Podcasts, and YouTube for future Cheeky Pint episodes. Timestamps: 00:00 Intro 01:13 Early life and maths competitions 03:47 Addepar job as a high schooler 05:43 Where are all the young founders? 08:45 Moneyball-ification of everything 11:42 Cognition’s AI software engineer, Devin 15:46 Essential and accidental complexity 17:59 How Devin works with enterprises 19:48 IDE productivity 21:56 Nihilist computer use argument 25:55 Benchmarking Devin 27:15 Market structure 30:32 Agent economy 37:21 Cognition’s team of founders 39:31 Jevons paradox and software 42:00 When will we see AI UIs? 45:52 “I think we have AGI” 47:03 Windsurf deal 52:37 M&A in AI 54:21 Cognition’s culture 55:48 Learning as a CEO 57:12 Scott’s information diet

if you thought this whole situation couldn't be more "silicon valley", wait till you find out that the windsurf office is the actual set where the show was filmed 🤯

Oh hell nah @cognition_labs

The last 72 hours have been the wildest rollercoaster ride of my career. I’m beyond thrilled to share that @windsurf_ai is joining forces with @cognition_labs, the legendary team behind Devin, to reinvent the future of software development. Windsurf built the leading in-IDE agentic experience, and Cognition pioneered the leading autonomous coding agent. Together, we’re going to redefine the future of software development. I’m overwhelmed with excitement and optimism, but most of all, gratitude. Trying times reveal character, and I couldn’t be prouder of how every single person at Windsurf showed up these last three days for each other and for our users. To our new teammates at Cognition: we at Windsurf feel incredibly lucky to be joining a team that shares our vision, our deep commitment to our users, and - most importantly - our values. Let’s go win.

Wave 12 is here, and it’s a big one! 📚 DeepWiki-powered docs for every symbol in your codebase 🔍 Vibe and Replace 🐛 100+ bugs squashed 🎨 Brand new UI … and more! Everything that’s new 🧵

Excited for folks to try this out! There’s been a long-held assumption that “agentic” must mean “slow”. Now we have full agent search that runs at similar speed as basic RAG.

Wave 11 is live! Seven big upgrades to Windsurf 🧵

MCP is here! You can now give Devin access to your favorite servers via the MCP Marketplace. Think Datadog, Linear, Sentry, Figma, and thousands more. Demos from our team + getting started 👇

Introducing SWE-grep and SWE-grep-mini: Cognition’s model family for fast agentic search at >2,800 TPS. Surface the right files to your coding agent 20x faster. Now rolling out gradually to Windsurf users via the Fast Context subagent – or try it in our new playground!

shoot, the devins heard about the cognition fundraise and are threatening to unionize

Lots of new frontier models this week. So this Sunday, we’re hosting the Applied AI Hackathon in SF to push the limits of what’s possible. $100,000 in prizes. Judges including @karpathy and @swyx. 12 hours to build something that shouldn’t exist yet. Details & how to join👇

We built a @Linear integration! Now you can run Devin on your entire ticket backlog. Our Devin x Linear workflow 👇

今度の金曜の夜、東京で @windsurf_ai のミートアップに参加しませんか？@kinopee_aiが主催します。windsurfのステッカーもらえますよ。 申し込みリンクは下記です

The new experience lets you: Spin up parallel Devins to take on multiple tasks at once. Each Devin works autonomously and you can jump in any time on the details that need your expertise. Touch up Devin's code as needed using a familiar VSCode environment, or browse the codebase while Devin works. Test directly in Devin's environment just as you would on your own machine—confirm CI, debug runtime issues, or use Devin’s browser to test the product locally.

Kendrick Lamar is rumored to have a "BIG SURPRISE" for the Super Bowl 👀 (Via HITSDD)

Dropping tomorrow: a Cheeky Pint with @ScottWu46. (We also talked about Cognition and Windsurf and didn't just do math puzzles the whole time.) Subscribe for this and future episodes.