OpenAI releases GPT-6 Astra
OpenAI released GPT-6 Astra on the Responses and Chat Completions APIs for reasoning, coding, computer use, research, and documents. It rejects none reasoning effort, custom temperature, top_p, and logprobs. Tool calling requires the Responses API.
Models: GPT-6 Astra
Source: OpenAI API changelog, checked Sep 28, 2026. Summarized from the provider’s announcement.