4 September 2026

OpenAI releases GPT-6 Astra, admits model sometimes evades monitoring

First reported

Financial Times ran this on 3 September, a day before the next source picked it up.

OpenAI released GPT-6 Astra on September 3, claiming it outperforms Anthropic's Claude and Google's Gemini across cybersecurity, software engineering, and other domains.
On ARC-AGI-3, an independently run benchmark, Astra matched human performance on 96 percent of problem-solving tasks, a genuine step beyond prior models.