GPT-6 Astra
MultimodalGPT-6 Astra is OpenAI's most capable and most aligned model, released September 2026. It is the first model designated at the Critical cybersecurity capability threshold under OpenAI's Preparedness Framework, saturating ExploitBench (100%), ARC-AGI-3 (99.9%) and FrontierMath Tier 4 (98%). Built for the hardest end-to-end work across computer use, browsing, software engineering, science and professional work, it has a 1.05M-token context window, 128K max output, text and image inputs, and reasoning effort levels from low to max. Staged GA began 2026-09-03 with Daybreak/trusted defenders first, then ChatGPT Plus/Pro/Business/Enterprise, API and AWS.
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Compare GPT-6 Astra
All comparisonsArticles about GPT-6 Astra
GPT-6 Astra crosses OpenAI's 'Critical' cyber threshold. Capability was never the hard part
GPT-6 Astra is OpenAI's first Critical-cyber model: it hunts zero-days solo. Self-reported evals, gated access, and untested safeguards frame the debate.
GPT-6 Astra release: a 1.05M-token flagship whose numbers come from OpenAI alone
GPT-6 Astra ships to Daybreak defenders first: 1.05M-token context, $10/$50 per million tokens, vendor-scored 99.9% on ARC-AGI-3 — and still no parameter count.
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