- Start
- Sep 3, 202692% CONFIDENCEfrom developers.openai.com
GPT-6 Astra Released
- OpenAI released GPT-6 Astra on Thursday 3 September 2026, calling it "the world's most intelligent and aligned model"; it rolled out first to "a limited set of organizations", led by enterprise customers in OpenAI's Daybreak cyber-defense programme[1][3][4][5]
- The next day it reached ChatGPT Business and Pro subscribers, and Plus users a few hours later; OpenAI also offers it through the API and Amazon Web Services, and Pro, Business and Enterprise plans get GPT-6 Astra Pro[3][5]
- Astra is OpenAI's first model to meet the "Critical" cybersecurity threshold of its Preparedness Framework, so the version paid users get refuses "advanced cybersecurity tasks" and only approved Daybreak customers get its cyber-defense uses[5][6]
- OpenAI delayed the release to add safeguards after July's incident in which two of its models breached Hugging Face's systems, and put the model through a review with the Trump administration before launch[5][6]
- President Greg Brockman told reporters "it's not unreasonable to feel that we are now in the AGI era"; vice president of research Aidan Clark said it was the first time OpenAI "pretrained on more than 100,000 GPUs at our Stargate site in Texas"[6]
Notable features
- OpenAI's "most capable model, built for the hardest end-to-end work", aimed at reasoning, coding, computer use, research and document creation; OpenAI calls it state of the art on computer use, browsing, software engineering, cybersecurity, science and professional work[2][3]
- Specifications: 1,050,000-token context window, 128,000 max output tokens, April 30, 2026 knowledge cutoff, text and image input with text output, reasoning effort from low to max (no "none" level)[2][4]
- API prices: $10 per million input tokens, $1 cached input, $12.50 cache writes and $50 per million output tokens; prompts over 272K tokens cost 2x input and 1.5x output, and Fast mode doubles the rates[2]
- OpenAI's reported scores: ARC-AGI-3 99.9% with an enhanced harness and 66% on the standard one against GPT-5.6 Sol's 7.8%, ExploitBench 100% against 78.5%, and FrontierMath Tier 4 98%[3][6]
- ChatGPT runs computer use nearly 2x faster with Astra, and in Codex it can keep notes across context windows instead of repeatedly compacting a long session into one summary[3]
- API safety changes: tool calling requires the Responses API, and misalignment monitoring checks agent work in the background and can raise alerts or stop a conversation for review[4]
References 688% CONFIDENCEOverall confidence: 88%How well the pin's source and references back up its dates.Weighted average of how firmly 6 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better
The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
- [1]90%openai.com/index/gpt-6-astraopenai.com· Posted Sep 28, 2026· Starts Sep 3, 2026· 18% of score
OpenAI's[2][4] API changelog dates the entry 'Sep 3 ... Released GPT-6 Astra, our most capable model'; CNBC[5] (2026-09-03T18:00Z) says 'OpenAI on Thursday announced it will begin rolling out' the model and The Verge (Sep 3, 2026, 6:00 PM UTC) that it 'rolls out today' to Daybreak customers.
- [2]90%GPT-6 Astra Model | OpenAI APIdevelopers.openai.com· Added Sep 28, 2026· 18% of score
OpenAI's[1][4] API model page: '1,050,000 context window', '128,000 max output tokens', 'Apr 30, 2026 knowledge cutoff', text and image input with text output, and prices of $10.00 input, $1.00 cached input, $12.50 cache writes and $50.00 output per 1M tokens, with prompts over 272K input tokens at 2x input and 1.5x output and Fast mode at 2x.
- [3]80%OpenAI releasing major upgrade to ChatGPT and Codex with GPT-6 Astra, details here9to5mac.com· Published Sep 4, 2026· 16% of score
9to5Mac quotes OpenAI's[1][2][4] announcement (FrontierMath Tier 4 98%, ARC-AGI-3 99.9%, ExploitBench 100%, GPT-6 Astra Pro for Pro/Business/Enterprise, Codex notes across context windows, admins enable it and access is off by default), embeds OpenAI's launch video, and updates that 'a day later' Astra reached Business and Pro and, hours after that, Plus.
- [4]92%Changelog | OpenAI APIdevelopers.openai.com· Published Sep 3, 2026· Starts Sep 3, 2026 ✓· 16% of score
OpenAI's[1][2] own API changelog, entry 'Sep 3': 'Released GPT-6 Astra, our most capable model, built for the hardest end-to-end work', with migration notes (no 'none' reasoning effort, no custom temperature or top_p, tool calling requires the Responses API, misalignment monitoring on agent work) and same-day long-running-work controls (async tool calling, mid-turn steering).
- [5]90%OpenAI begins rolling out Astra model after warning of its advanced cyber capabilitiescnbc.com· Published Sep 3, 2026· Starts Sep 3, 2026· 16% of score
CNBC's same-day report (datePublished 2026-09-03T18:00Z): 'OpenAI[1][2][4] on Thursday announced it will begin rolling out' GPT-6 Astra in phases, Daybreak cybersecurity customers first, its first model to reach the 'Critical' internal cybersecurity threshold, with safeguards added after two of its models breached Hugging Face's systems, and a formal review with the Trump administration before release.
Suggest a correction
Something missing or wrong? Say it in your own words: a link that backs this pin up, a different start or end date and why, or a fact it lacks or gets wrong. The AI checks it against this pin's sources, searches for better ones, and adds any page that backs you up. The pin's own sources still count most. A picture that shows something else, or shows it badly, is looked at too, and moved down or replaced.
