GPT-6 Astra is a Super-Frontier AI model developed by OpenAI and released in September 2026. It is a proprietary closed-weight model, available through OpenAI’s products and API. The 1.05M-token context window is large enough to hold entire codebases, lengthy technical documents, or extended agentic sessions without truncation.
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OpenAI’s system card calls Astra the most capable model it has ever broadly deployed, and the first to reach the Critical level of cybersecurity capability under its Preparedness Framework. Because of that, advanced cyber capabilities are limited to approved defenders through OpenAI’s Daybreak program rather than offered to everyone.
Compared with its predecessor GPT-5.6 Sol, OpenAI reports that Astra is more robust to jailbreaks and better aligned, including at staying within its authorized scope. OpenAI also disclosed that Astra’s written reasoning is harder to monitor than Sol’s, which it treats as an open problem.
OpenAI positions Astra for driving a desktop on its own: filling out forms, updating business tools, and checking a website it has just built.
Software Engineering
OpenAI describes Astra as its best model for software engineering to date. In Codex it keeps notes across context windows, so long debugging sessions keep the detail of earlier attempts.
Security Research
Astra can find previously unknown security flaws and develop exploits for them with little human guidance. Advanced cyber capabilities are gated for approved defenders.
Long-Document & Codebase Analysis
With a 1.05M-token context window, GPT-6 Astra can take in entire repositories, long contracts, or extensive working histories in a single prompt.
Strengths and limitations
Strengths
+Agentic computer use
+Software engineering and long-running coding agents
+Cybersecurity capability
+More robust to jailbreaks and better aligned than GPT-5.6 Sol, per OpenAI
+Very long documents and large codebases (1.05M context)
Limitations
−Closed-weight, so it cannot be self-hosted or fine-tuned on private data
−Staged rollout, with advanced cyber capabilities gated
−Written reasoning is harder to monitor than GPT-5.6 Sol's
Use it in FlowHunt
Use GPT-6 Astra in any flow, next to your own tools and knowledge sources.
About OpenAISan Francisco, CA · Founded 2015 · openai.com
OpenAI was founded in December 2015 as a nonprofit AI research laboratory by Sam Altman, Elon Musk, Greg Brockman, Ilya Sutskever, John Schulman, and Wojciech Zaremba, with the mission of developing artificial general intelligence (AGI) that benefits all of humanity. In 2019 it created a capped-profit subsidiary, OpenAI LP, to raise institutional capital and scale model training. The company is known for the GPT series of language models (GPT-1 through GPT-6.1), the DALL-E image generation series, Whisper speech recognition, and Sora video generation. OpenAI operates the ChatGPT consumer application, a developer API, and enterprise services through Microsoft Azure. As of 2026 it maintains a close strategic partnership with Microsoft, which is the company's largest investor and cloud provider.
GPT-6 Astra is a Super-Frontier AI model developed by OpenAI and released in September 2026. OpenAI describes it as the most capable model it has ever broadly deployed.
GPT-6 Astra is a proprietary closed-weight model. Its weights are not publicly available. Access is through OpenAI's products and API, with advanced cyber capabilities restricted to approved defenders.
GPT-6 Astra supports a 1.05M-token context window, large enough to hold entire codebases, lengthy technical documents, or extended agentic sessions without truncation.
Yes — GPT-6 Astra is directly available in FlowHunt. You can use it to build AI agents, automated workflows, chatbots, and document processing pipelines without any additional setup.
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