BuildersfromXOct 7For reference, Haiku 4.5 came out on October 15th, 2025 so these two columns are less than a ye…
BuildersfromXSep 28Sonnet 5.5 has the same feel I liked about Opus 5.5. It writes clearly, it's very fast, and it'…Custom AI
BuildersfromXSep 22Prompt in Claude Tag "Recreate Market Street, San Francisco as it stood on April 17, 1906, the…
BuildersfromXSep 22I've been on a Blender kick with Opus 5.5. Its better 3D modeling and vision mean you can build…Images, Audio & VideoCustom AI
BuildersfromXSep 22need to make sure you've been updated to this (rolling out to everyone soon if you haven't!) ht…
BuildersfromXSep 16The team did an amazing job with this merge. The resulting UX feels so much better than chat or…
BuildersfromXSep 12Worth spending a few minutes this weekend to read this essay in full. Embedded evaluators might…AI Testing
BuildersfromXSep 1One non-model thing I'm very excited we announced today with Fable 5.1 is Enterprise Frontier S…AI AssistantsBusiness AI
BuildersfromXSep 1Fable 5.1 is a beast at many things but one thing in particular I have been having a ton of fun…CodingImages, Audio & Video
BuildersfromXJul 24Just over 6 months later, Opus 5 now produces near-superhuman level spreadsheets and slide deck…
BuildersfromXJul 24Some of my favorite graphs from Opus 5 launch. We put a ton of work into making this model toke…Coding
BuildersfromXJun 23This has completely changed how I work with Claude. It feels less like using a tool and more li…
BuildersfromXJun 12Pulled this from our prompting guide which has many more tips for working with Fable: https://t…AI Using Computers
BuildersfromXJun 12Fable feels superhuman at working over long agentic conversations, sometimes to the point where…AI AssistantsCustom AI
BuildersfromXJun 9We've reset usage limits across our products! For those just starting to test Fable, here's fou…
BuildersfromXJun 9I've been at Anthropic through every model launch. There's been a few cases I can remember of a…
BuildersfromXJun 4We just published internal data on how much of Claude's development is already being done by Cl…CodingResearch
BuildersfromXMay 8An early Claude Mythos Preview snapshot we provided METR has a time horizon of more than 2x the…Custom AIAI Testing
BuildersfromXMay 7With the help of Claude Mythos Preview, the Firefox team fixed more security bugs in April than…Business AI
BuildersfromXMay 6I'll be at Code with Claude all day today so come find me and let's chat about Claude! I'll als…Coding
BuildersfromXApr 20Jack's young money blog had a big impact on me when I was in college and navigating what I want…
BuildersfromXApr 17Everyone with a vision can produce very high-quality designs now (with a lil help from Claude)…Images, Audio & Video
BuildersfromXApr 17A lot of bugs that folks may have hit yesterday when first trying Opus 4.7 are now fixed. Thank…
BuildersfromXApr 16Some of my favorite things in Opus 4.7: - Very good at async work and following instructions -…Images, Audio & Video
BuildersfromXApr 14New version of Claude Code in the desktop app dropped today with tons of new features and perfo…CodingAI Using Computers
BuildersfromXApr 9Allowing Sonnet to "phone a friend" (i.e. call Opus) increases performance while also reducing…
BuildersfromXApr 8I've found Managed Agents to somehow be both the fastest way to hack together a weekend agent p…AI AssistantsAI Using Tools
BuildersfromXApr 7Mythos Preview is currently available to our launch partners in Project Glasswing. Learn more a…
BuildersfromXApr 7We released Claude Opus 4.6 just two months ago. Today we're sharing some info on our new model…
BuildersfromXApr 7Glasswing is possibly the most consequential event in the AI industry I've seen up close since…