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Saturday, 5 September 2026

OpenAI quietly boosts some of Astra's evaluation metrics, and continues to change others post-launch

Fortune 48 ● 19 sources

OpenAI updated multiple evaluation benchmark metrics for its GPT-6 Astra model after its Sept. 3 launch blog, with some Astra scores rising while some rival-model scores fell. The reported hallucination rate for Astra changed from 4.2% to 2% within hours, and later returned to 4.2%. The result is a moving target for comparing model performance across checkpoints and harnesses, fueling scrutiny over how evaluations are configured and reported.

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OpenAI AI Benchmarking Model Evaluation GPT-5

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