Models
GPT-6 Astra
OpenAI's flagship model, announced September 3, 2026, for complex reasoning, coding, computer and browser use, research, and document creation. 1.05M-token context, 128K output, reasoning effort from low to max.
Highlights
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1.05M context, 128K output
Text and image input with reasoning tokens. Knowledge cutoff April 30, 2026.
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Five effort levels
reasoning.effort runs low, medium, high, xhigh, and max, so the same model serves quick edits and long investigations.
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Computer and browser use
State of the art on computer use, browsing, and software engineering, with enterprise browser plugins for ChatGPT Work.
Availability
Model id gpt-6-astra on the OpenAI API, Microsoft Azure, and Amazon Bedrock. Included in ChatGPT Plus, Pro, Business, and Enterprise (admins enable it) and in Codex. Not on the free tier.
Pricing
Paid Input $10 / MTok
Output $50 / MTok
Cached input $1 / MTok
Prompts over 272K input tokens bill at twice the input and 1.5 times the output rate for the whole request. Pro, Business, and Enterprise plans also get GPT-6 Astra Pro.