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GPT-6 Astra

70 days since OpenAI announced it ·

GPT-6 Astra is a closed-weights LLM from OpenAI, announced 3 Sep 2026. It costs $10 per 1M input tokens and $50 per 1M output tokens. Its context window is 1.05M tokens.

Input
$10
per 1M tokens
Cache write
$12.50
per 1M tokens
Cache read
$1
per 1M tokens
Output
$50
per 1M tokens
Context window
1.05M
tokens
Parameters
—
not disclosed
Announcement
openai.com/index/gpt-6-astra
Docs
developers.openai.com/api/docs/models/gpt-6-astra

Our coverage

5 stories

  1. GPT‑6 Astra crosses OpenAI's Critical cyber threshold

  2. OpenAI launches GPT-6 Astra and custom silicon

  3. OpenAI launches GPT-6 Astra

  4. GPT-6 Astra hits OpenAI's 'Critical' cyber threshold

  5. OpenAI designates Astra Critical for cybersecurity

OpenAI · Big

closed weights

A new one every ~66 days — due now.

  1. GPT-6 Astra +133d
  2. GPT-5.5 +49d
  3. GPT-5.4 +84d
  4. GPT-5.2 +28d
  5. GPT-5.1 +98d
  6. GPT-5

More from OpenAI

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  3. GPT-Image-2.6 Sunburst
  4. GPT-6 Rosalind
  5. GPT-6.1 Terra
  6. GPT-6.1 Sol
  7. GPT-6 Luna
  8. GPT-6 Sol

Facts last updated , from OpenAI’s own pages.

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