Story · Simon Willison
GPT-6 Astra (Simon Willison)
blog post · Story page
Simon Willison rounds up GPT-6 Astra's rollout, pricing, and OpenAI's self-reported benchmarks, including the gap between OpenAI's own harness and the default one on ARC-AGI 3.
In plain words
- OpenAI began rolling out its new Astra artificial intelligence system to selected organizations.
- It keeps hidden reasoning work between requests and compresses older conversation details, helping it reuse earlier work.
- OpenAI reports much better test results with its custom setup than with the standard setup.
- Organizations comparing leading artificial intelligence systems may see stronger security and task results, but the claims remain self-reported.
Appeared in
- GPT-6 Astra's score hinges on its harness, and agents rot geometrically with each step
Sep 04, 2026 · lead story
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