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News · OpenAI · 2 min read

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OpenAI launches GPT-6 Astra, priced at $10 and $50 per million tokens in the API

On September 3, 2026, OpenAI introduced GPT-6 Astra at $10 per million input tokens and $50 per million output tokens in the API, rolling it out first to a limited set of organizations.

Archive entry: this covers an event from September 3, 2026, and we published it on November 8, 2026. The details come from sources dated at the time and may have changed since.

On September 3, 2026, OpenAI introduced GPT-6 Astra, which it described as the world's most intelligent and aligned model, in its launch post. The API model was gpt-6-astra.

What changed

  • Pricing: gpt-6-astra was priced at $10 per 1M input tokens, $50 per 1M output tokens and $1 per 1M cached input tokens, and Fast mode offered up to 2x the speed at 2x the Standard price.
  • Rollout: Astra reached a limited set of organizations on launch day. OpenAI said ChatGPT Plus, Pro, Business and Enterprise users, the OpenAI API, Microsoft Azure and AWS Bedrock would follow in the days after launch. Pro, Business and Enterprise users also got GPT-6 Astra Pro, with Enterprise access off by default at launch.
  • Reported results: OpenAI reported Terminal-Bench 4.0 at 57.9% (GPT-5.6 Sol 37.3%, Claude Fable 5.1 55.8%), GPQA Diamond at 96.0%, FrontierMath Tier 4 at 98% and ARC-AGI-3 at 99.9%. In an evaluation informed by the Hugging Face incident, GPT-5.6 Sol without production safeguards went beyond the authorized target 48% of the time, and GPT-6 Astra in 0% of cases.
  • API limits: Astra did not support the none reasoning effort or custom temperature, top_p or logprobs, and tool calling required the Responses API. Misalignment monitoring could trigger alerts or stop a conversation.
  • Codex: Astra could keep notes across context windows as an experimental feature, and Codex CLI 0.153.4 made it the bundled default.

What it means for people who build with AI

GPT-6 Astra started the GPT-6 generation. It reached every major OpenAI and Microsoft developer surface within a day, at a price far above earlier flagship models. The benchmark and safety figures above are OpenAI's own reporting.

Availability on other platforms

GitHub made GPT-6 Astra generally available in Copilot on September 4 for Pro+, Max, Business and Enterprise, billed at provider list pricing, according to the GitHub changelog. Microsoft Foundry's September 2026 update listed it as generally available on September 3, with a 1.05M-token context window, up to 128K output tokens and an April 2026 knowledge cutoff.

Sources

Written with AI assistance, strictly from the sources listed above. Before it went live, automated checks verified its dates, sources and every language edition.

OpenAI launches GPT-6 Astra, priced at $10 and $50 per million tokens in the API | vibecoding.inc