Haochen Zhang
33 posts
Haochen Zhang
@jhaochenz
Member of Technical Staff @AnthropicAI | prev. CS PhD @StanfordAILab
San Francisco Katılım Ağustos 2013
295 Takip Edilen883 Takipçiler
After three years at CRV, I am stepping onto Striker Venture Partners' founding team, leading the firm's AI investments. Thanks to @BusinessInsider for covering the move.
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The best model for coding is here, come try Claude Opus 4.5!
Claude@claudeai
Introducing Claude Opus 4.5: the best model in the world for coding, agents, and computer use. Opus 4.5 is a step forward in what AI systems can do, and a preview of larger changes to how work gets done.
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I told my parents that I’d like to drop out of my cs phd program at Stanford a few months back.
They didn’t let me, we’re asian :)
So I graduated and started @moonlake.
@sharonal_lee and I saw urgency, and opportunities. Excited to share that we raised a 28 million dollar seed round to build the future for simulations and games.
Grateful for the angels @naval, @goodfellow_ian @stevechen, @JeffDean @rauchg, @emerywells, @JaredLeto, @chrlaf, alongside many more, and the venture partners that we are fortunate to work with: @moislamvc, Shaun Johnson, @chrmanning, Artem Barsukov, Elvin Hao, @mercebent, @veelarco and William Freiberg. If you're a founder and you're not partnering with them, you're making a big mistake.
Check out what we're about 👇
Moonlake@moonlake
We raised $28M seed from Threshold Ventures, AIX Ventures, and NVentures (Nvidia's venture capital arm) —alongside 10+ unicorn founders and top AI researchers— to build reasoning models that generate real-time simulations and games. Models are bottlenecked by practical simulations that can act as Reinforcement Learning environments. Human self-expression is bounded by tools that let us create alternate realities. At Moonlake, we are building a future where anyone can create interactive worlds, bring their child-like wonder to life, learn within them, and most importantly, share experiences with people we care about. More in 🧵
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Haochen Zhang retweetledi
Haochen Zhang retweetledi
We've made Claude Opus 4 and Claude Sonnet 4 significantly better at avoiding reward hacking behaviors (like hard-coding and special-casing in code settings) that we frequently saw in Claude Sonnet 3.7.
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Glad to see what we've been working on finally get out! Lots of cool ideas and hard work have gone into this model, and there are still so many open research questions ahead around solving alignment and scaling up RL. Looking forward to what we'll learn next.
Anthropic@AnthropicAI
Introducing the next generation: Claude Opus 4 and Claude Sonnet 4. Claude Opus 4 is our most powerful model yet, and the world’s best coding model. Claude Sonnet 4 is a significant upgrade from its predecessor, delivering superior coding and reasoning.
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Nothing beats the adrenaline rush of debugging numerics on a job as big as GPT4.5. It was an honor to work on this project with such talented teammates!
Sam Altman@sama
it's very hard to get the math and ML right on a run as big as GPT-4.5, and requires difficult work at the intersection of ML and systems. @ColinWei11 , Yujia Jin, and @MikhailPavlov5 did excellent work to make this happen!
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Also, Claude Code feels magic when I first use it, come try it out!
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What if you can control how much the model thinks? Sharing our first hybrid reasoning model, with fine-grained control over thinking budget.
Anthropic@AnthropicAI
Introducing Claude 3.7 Sonnet: our most intelligent model to date. It's a hybrid reasoning model, producing near-instant responses or extended, step-by-step thinking. One model, two ways to think. We’re also releasing an agentic coding tool: Claude Code.
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Thrilled to share that I’m joining @AnthropicAI !
After 5.5 amazing years at Alphabet, including working on Gemini’s reasoning over the past 2 years, I’m looking forward to advancing Claude’s ability to tackle complex reasoning challenges across a diverse range of domains!
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Our model now has the capability of using computers. Excited for a new era of human-AI collaboration.
Anthropic@AnthropicAI
The new Claude 3.5 Sonnet is the first frontier AI model to offer computer use in public beta. While groundbreaking, computer use is still experimental—at times error-prone. We're releasing it early for feedback from developers.
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Haochen Zhang retweetledi
Machines of Loving Grace: my essay on how AI could transform the world for the better
darioamodei.com/machines-of-lo…
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Personal news: I'm joining @AnthropicAI! 😄 Anthropic's approach to AI development resonates significantly with my own beliefs; looking forward to contributing to Anthropic's mission of developing powerful AI systems responsibly. Can't wait to work with their talented team, including a number of great ex-colleagues from OpenAI and Google, and tackle the challenges ahead!
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Life update: I’m excited to share that I’m joining the Alignment Science team at @AnthropicAI as a Member of Technical Staff/Research Scientist. I’ll be focusing on AI safety. Looking forward to it!
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I have been working on 4o mini 🚀, our most intelligent and efficient model. Hope it can unlock a lot more downstream applications, check it out!!
OpenAI Developers@OpenAIDevs
Introducing GPT-4o mini! It’s our most intelligent and affordable small model, available today in the API. GPT-4o mini is significantly smarter and cheaper than GPT-3.5 Turbo. openai.com/index/gpt-4o-m…
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Haochen Zhang retweetledi
New today: organize your claude[dot]ai chats in Projects, and add files & context and 💫 custom instructions 💫 that are shared across all project chats.
And on the Claude Team plan, you can discover great uses of Claude within your team using a new activity feed & shared chats.
Anthropic@AnthropicAI
You can now organize chats with Claude into shareable Projects. Each project includes a 200K context window, so you can include relevant documents, code, and files.
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Haochen Zhang retweetledi
Artifacts pro tip:
If you are running into unsupported library errors with NPM modules, just ask Claude to use the cdnjs link instead and it should work just fine.
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I joined the amazing team at @AnthropicAI last month.
Excited to share what we’ve been working on recently!
Anthropic@AnthropicAI
Introducing Claude 3.5 Sonnet—our most intelligent model yet. This is the first release in our 3.5 model family. Sonnet now outperforms competitor models on key evaluations, at twice the speed of Claude 3 Opus and one-fifth the cost. Try it for free: claude.ai
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