I gave Fable 5.2 a PDF of one of Leonardo da Vinci’s 500-year-old notebooks and it made his inventions real for me to interact with. Such an exciting time for education. Anything from history that’s been stuck on a page can now be something you explore.↗

Every time we have a new model, I run the same simple prompt on all my projects: "Read this entire project and find everything that’s broken, inconsistent, inefficient, or no longer needed. Fix what you’re sure about and list the rest for me to review." highly recommend trying↗

Fable 5.1 is a beast at many things but one thing in particular I have been having a ton of fun with is generating videos through code. For this one I gave it a picture of a property lot. It designed a house for the lot, rendered it, and produced a cinematic walkthrough.↗

We released Claude Opus 4.6 just two months ago. Today we're sharing some info on our new model, Claude Mythos Preview.↗

5. Vision is improved. Opus is better at image processing and data extraction, especially with multiple images. For dense images, give it a cropping tool to "zoom" in on regions. We've seen consistent uplift on image evals with this.↗

We put together a prompting guide for Claude Opus 4.5 based on extensive internal testing by our research and applied AI teams. Here's what we've learned so far about getting the best results:↗

What's your favorite Claude Skill?↗

We just released our second developer course, which introduces the fundamentals of the Anthropic API. Let me walk you through what it covers:↗