Claude Sonnet 5, Fable 5, and robot hands

AI news is moving at warp speed. In this thread: a new Claude, a model that was pulled offline and restored, NVIDIA’s push into physical AI, and robots learning humanlike dexterity.

Claude Sonnet 5 just launched with a 1M-token context window, $2/M input tokens for the intro period, and performance that gets close to Opus 4.8 while becoming the default for Free and Pro users^[5].

Fable 5 is back after a 20-day shutdown: Anthropic says its own tests showed Opus 4.8, GPT-5.5, and Kimi K2.7 could reproduce the same exploit, so the safety drama looks less unique than it first seemed^[5].

NVIDIA is pushing physical AI harder: Jetson is now agentic-ready for robotics, healthcare, and industrial automation, while Cosmos 3 combines vision reasoning, multimodal generation, and action prediction in one foundation model^[4].

Researchers are teaching robot arms and prosthetics to grasp and rotate objects, and a new biorobotic hand can grip plush toys, water bottles, and other everyday items like a human^[1].