We’re introducing Claude Fable 5.1 and Claude Mythos 5.1. They're the world’s most advanced models for coding and knowledge work. https://t.co/8P9PSrWPi3↗

Introducing Atlas: The world's first multimodal world model that generates image and video frames with pixel-perfect camera control and reconstructs them in 3D. Model the world, move the camera, and simulate space & time. https://t.co/o0qeGubi19↗

As we prepare to release Astra, we’re focused on making increasingly capable AI safe and broadly accessible. Astra represents a significant advance in cybersecurity capability, reaching the Critical threshold under our Preparedness Framework. We're previewing how we evaluated …↗

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. https…↗

Muse Voice Transcribe is MSL's first real-time audio perception model -- rolling out today. SOTA in streaming speech-to-text, it handles speaker diarization, and endpointing natively in a single model. https://t.co/LViMDSkbim↗

🚰 SYSTEM PROMPT LEAK 🚰 Here's the Fable 5.1 system prompt!! 🙌 Coming in at a WHOPPING 270,000+ characters, this prompt is definitely on the longer side. There have been a handful of notable edits/additions since Opus 5's version. FULL PROMPT: https://t.co/monD9UywOX Accor…↗

Btw we open sourced the core infra piece that makes these self improving loops possible. https://t.co/4KvIoFtGE8↗

I'd always thought AI was terrible at design, but after reading today's 🤯 post by @anshuc, I realized I was just doing it wrong. "AI models are capable of amazing creativity, but that creativity gets stifled. LLMs are trained to be next-token predictors: they look at a sequenc…↗

Introducing Agentic Video in the Gemini API, a new way to process long videos which reduces token consumption by up to 88% while also increasing quality. This can be controlled easily in the API on a per video basis, available with our newest models like 3.7 Flash! https://t.c…↗

if you are non-technical and your github looks like this I want to be friends and I want to hire you https://t.co/mBRNKLgJvp↗

AI data labeling company @AfterQuery is now valued at $3.2 billion, sources say, 10xing its valuation since April. That would make it the fastest YC company to go from inception -> unicorn. Oh, and its founders are 22 and 23 years old. https://t.co/fjALTcrR1s↗

Introducing WebMCP + agent-browser The web is becoming agent-native 𝚊𝚐𝚎𝚗𝚝-𝚋𝚛𝚘𝚠𝚜𝚎𝚛 𝚠𝚎𝚋𝚖𝚌𝚙 <𝚕𝚒𝚜𝚝|𝚒𝚗𝚟𝚘𝚔𝚎> → Discover & call tools → For missing tools, falls back to browser automation https://t.co/TdUUJnkXcL↗

My second conversation with Sarah Guo (@saranormous), founder of Conviction. Sarah's been early to many of this generation's defining companies, and is constantly ranked at the top of the managers LPs most want to invest with. She knows the small group of 250 people pushing th…↗

tree menu interaction ⎯⟡° https://t.co/kU0Vf2Csai↗

53.5 million tokens per second are moving through OpenRouter’s top 20 apps right now. I scraped their public usage pages to show which models are being used https://t.co/ewn1ZzjDJu https://t.co/Q4yWWcJEdH↗