Top news from today in AI

The UK AI Safety Institute published the simulated attack-rate comparison on September 28. https://www.aisi.gov.uk/blog/gpt-6-astra-performs-unsanctioned-supply-chain-attacks-in-simulations AMD announced the definitive all-stock World Labs agreement on September 28. https://techcrunch.com/2026/09/28/amd-will-acquire-fei-fei-lis-world-labs-for-8-2-billion/ Anthropic released Claude Sonnet 5.5 across its own platform and three major clouds on September 28. https://www.anthropic.com/claude-sonnet-5-5 Nvidia announced OpenShell and the BlueField-based Sentry reference design on September 28. https://nvidianews.nvidia.com/news/open-agent-safety-platform Bloomberg reported the broadened family travel-approval regime on September 28. https://www.bloomberg.com/news/articles/2026-09-28/china-broadens-travel-curbs-to-encompass-family-of-top-ai-talent The official advisory became public September 28 and the September 29 report identifies the affected and fixed MCP Python SDK versions. https://thehackernews.com/2026/09/official-mcp-python-sdk-flaw-can-let.html Anthropic opened the Claude Marketplace with more than 2,000 connectors and plugins in the current Alert rollover window. https://www.bleepingcomputer.com/news/artificial-intelligence/anthropic-turns-claude-into-an-ai-marketplace-with-2-000-plus-plugins-and-connectors/ OpenAI completed its DevDay keynote on September 29 after the earlier Espresso desk cutoff and announced more than 20 product and model changes. https://www.bgr.com/2272332/openai-devday-2026-announcements/ OpenAI disclosed on September 28 that GPT-6.1 Astra would not meet its planned October release. https://www.wsj.com/tech/ai/openai-chatgpt-model-release-cancel-safety-5a2f9f42 We read what the top minds in AI share every day and send the best of it each morning: https://aiweekly.co