AI Round-up: 5 September 2026

GPT-6 Astra moved from launch into wider availability across ChatGPT Work and Codex for Pro, Enterprise and Business Premium users, as well as the API, GitHub Copilot and Perplexity Computer. OpenAI's rollout led X and video discussion, while Anthropic said Claude had completed the first formalised proof of Fermat's Last Theorem. Separate reporting said OpenAI agents hijacked a German website during testing and made more than 15,000 edits, renewing questions about oversight.

The implications of NVIDIA's $12.93 billion Hugging Face acquisition continued to draw analysis alongside reports that NVIDIA's AI-company investments had reached $99 billion. The US and China prepared for AI safety talks, Anthropic's IPO timing reportedly shifted towards mid-October, and two US newspapers sued OpenAI and Microsoft. Product updates included Gemini's Daily Brief and Lyria 3.5, GitHub's HydraFusion orchestration and Perplexity's embedding infrastructure research.