GPT-6 Astra

OpenAI's flagship model for computer/browser use, coding, and cybersecurity, rolling out via ChatGPT and API.

OpenAI · Frontier/foundation models · model

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Overview

GPT-6 Astra is OpenAI's flagship model, launched September 3, 2026, positioned above GPT-6 Sol and GPT-6 Luna. It has a 1,050,000-token context window with 128,000 max output tokens, and OpenAI markets it for computer/browser use, software engineering, deep research, and cybersecurity. It rolled out first to companies in OpenAI's Daybreak cybersecurity program, then to ChatGPT plans, the API, and AWS. On September 29, OpenAI added Ultrafast processing in the Responses API to reduce the time between generated output tokens; the tier has US data residency and does not support EU or other regional inference residency.

This is a sourced directory entry. Features and capabilities are reported in the linked sources; this entry does not document independent Aymorphic testing.

Key features

  • 1,050,000-token context window, 128,000 max output tokens
  • Positioned as state-of-the-art for computer/browser-use agentic tasks
  • Phased rollout starting with Daybreak cybersecurity program participants
  • Available via ChatGPT plans, the API, and AWS
  • Ultrafast processing tier for lower inter-token latency in the Responses API

Use cases

  • Advanced software engineering and deep research
  • Computer/browser-use agentic tasks
  • Cybersecurity work under the Daybreak program
  • Scientific and document-heavy professional work

Pricing

$10/million input tokens, $50/million output, $1/million cache read, $12.50/million cache write, $10 per 1,000 web-search calls below 272K input tokens; rates double for input/cache and rise 1.5x for output above that threshold.

Pricing reflects the source record and may change. Confirm current terms with the provider.

Dates and sources

Released
3 Sept 2026
Record updated
1 Oct 2026
Record last checked
1 Oct 2026

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