Jeff Wang (@jeffwsurf) / X

Jeff Wang

2,225 posts

Jeff Wang

@jeffwsurf

President, New Enterprise at Cognition, Prev. Windsurf CEO, AI @ jeffwang.substack.com

San Francisco, CA

Joined February 2009

Pinned
Jeff Wang
@jeffwsurf
May 27
We've raised $1B at a $26B valuation @cognition is firing on all cylinders, and we are constantly building the future of software engineering. Things are moving so fast that you might have missed some of our latest developments: -Having an interface that easily manages agents
Cognition
@cognition
May 27
1/ We’ve raised over $1B at a $26B valuation, led by @Lux_Capital, @generalcatalyst, and @8vc. Our enterprise usage has grown >10x since the start of this year, and our run-rate revenue grew to $492 M. We launched Devin two years ago as the first AI software engineer. Since
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Jeff Wang
@jeffwsurf
Jul 19, 2025
To put it mildly, the past week at Windsurf has been crazy. There have been a lot of different rumors and reports, so I want to share a transparent account of how it actually went down. Before I start, I just want to say that Varun and Douglas were great founders and this
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Jeff Wang
@jeffwsurf
Jul 14, 2025
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
Cognition
@cognition
Jul 14, 2025
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
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Jeff Wang
@jeffwsurf
Jul 11, 2025
At Windsurf, we have always believed that there is a unique opportunity to channel AI to accelerate the core human desire of translating ideas into reality. Whether we’re helping an individual or an organization, Windsurf’s mission has always been to enable our customers to dream
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Jeff Wang
@jeffwsurf
Oct 29, 2025
We're a model company again. Coding models typically sacrifice speed over quality, which gives users a trade off when selecting which model to pick in @windsurf, but today, we release SWE-1.5, which outputs at a blistering 950 tokens per second, 13x faster than Sonnet 4.5. Not
Devin Desktop
@devindesktop
Oct 29, 2025
Introducing SWE-1.5, our fast agent model. It achieves near-SOTA coding performance while setting a new standard for speed. Now available in Windsurf.
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Jeff Wang
@jeffwsurf
Jul 19, 2025
Replying to @jeffwsurf
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Jeff Wang
@jeffwsurf
Jul 16, 2025
We are so back
Devin Desktop
@devindesktop
Jul 16, 2025
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!
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Jeff Wang
@jeffwsurf
Sep 8, 2025
Congrats to @cognition for raising over $400M at a $10.2B valuation. Together with @windsurf we have collectively doubled our revenue with our acquisition, and our customers can benefit from the opportunities of both products having synergies between local and cloud agents. We’re
Funding, growth, and the next frontier of AI coding agents | Cognition
From cognition.ai
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Jeff Wang
@jeffwsurf
Jul 29, 2025
At last, we are now @windsurf - thank you @windsurf_ai for your service
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Jeff Wang
@jeffwsurf
Nov 4, 2025
We hear many concerns from Enterprise about AI coding tools creating a workforce that doesn't understand the code base. How will you level up junior engineers to senior engineers? How do you make sure your team really knows what is happening in the code? Announcing Codemaps,
Cognition
@cognition
Nov 4, 2025
Introducing Codemaps in @windsurf! powered by SWE-1.5 and Sonnet 4.5 “Your code is your understanding of the problem you’re exploring. So it’s only when you have your code in your head that you really understand the problem.” — @paulg
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Jeff Wang
@jeffwsurf
Jul 16, 2025
Still shipping
Devin Desktop
@devindesktop
Jul 15, 2025
We've got a lot to talk about 🎙️ Should we include this in Wave 11?
00:00
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Jeff Wang
@jeffwsurf
May 11, 2022
This has been the worst week of my life. I've been through multiple bear markets and come out stronger, but never with so many friends, partners and subscribers. These times are where the strongest relationships are forged and the hardest lessons are learned, LFG and continue on
Jeff Wang
@jeffwsurf
Aug 14, 2025
Rumors of our demise have been greatly exaggerated Wave 12 is here, and brings a brand new redesign of Windsurf. We're also integrating our first Devin feature, DeepWiki, which lets you understand your code base at a high level but also lets you drill down into every part of
Devin Desktop
@devindesktop
Aug 14, 2025
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 🧵
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Jeff Wang
@jeffwsurf
Jul 23, 2025
Open source keeps getting better, and will be an important part of the AI landscape. Try Kimi K2 on @windsurf_ai today!
Devin Desktop
@devindesktop
Jul 23, 2025
Kimi K2 is now available in Windsurf. Let us know what you think!
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