Two days after Anthropic shipped Fable 5.1, OpenAI responds ...

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2026-09-03T19:42:02Z

Two days after Anthropic shipped Fable 5.1, OpenAI responds with Astra.

Early benchmarks have Astra ahead on several key categories, though Fable 5.1 still leads on others.

Two frontier model releases in three days.

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