Astra is the first model OpenAI has designated Critical under its own preparedness framework - it can find unknown flaws in well-protected systems and chain exploits without a person guiding each step - and it scored 100% on ExploitBench before development was halted.
Fable 5.1 runs about 25% cheaper on typical work and 45% on long agentic runs after Anthropic cut cache reads to a quarter, fires fewer false refusals, and is the first Claude shipping a built-in watermark.
Anthropic will buy six years and about 350 megawatts of Texas capacity from Lambda, a cloud provider Nvidia invested in, filling a Hut 8 data centre whose lease Nvidia itself holds - reported, unannounced, no terms disclosed.
Washington will press member states not to create any body that could write AI rules, three months before the Miami leaders' summit - with Altman and Huang in the room and Musk on video, though the G20 cannot compel anyone.