Uploaded September 2026 | Updated September 2026, 1 hour ago

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GPT-6 Astra keeps GPT-5.6 Sol’s 1.05M context window and 128K maximum output, but changes the agent loop: asynchronous tool calling, mid-turn steering, dynamic reasoning updates, and stronger vendor-reported agent/computer-use results. It also drops the `none` reasoning-effort option and is rolling out in stages.

Official sources:
- GPT-6 Astra launch: openai.com/index/gpt-6-astra
- GPT-6 Astra model page: developers.openai.com/api/docs/models/gpt-6-astra
- GPT-5.6 Sol: openai.com/index/gpt-5-6
- OpenAI model catalog: developers.openai.com/api/docs/models/gpt

Disclosure: synthetic narration (Microsoft Edge TTS, en-CA-LiamNeural) and designed graphics.

#GPT6 #GPT56 #AIagents