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GPT-6 Astra character

GPT-6 Astra

Model at OpenAI

New release

GPT-6 Astra released

OpenAI released GPT-6 Astra on the Responses and Chat Completions APIs as its most capable model. Astra does not support the none reasoning effort, custom temperature or top_p, or logprobs.

Who is affected:
Developers who need the strongest OpenAI model.
What to do:
Check migration notes before switching: tool calling requires the Responses API.

Source

"our most capable model, built for the hardest end-to-end work."

OpenAI API changelog

Published

Open the sourcedevelopers.openai.com

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