OpenAI Releases GPT-6 Astra, Its First Model Rated Critical for Cybersecurity

OpenAI released GPT-6 Astra on September 3, 2026, describing it in its announcement as "the world's most intelligent and aligned model" and its first system to meet the Critical cybersecurity capability threshold under the company's Preparedness Framework. The model is rolling out initially to a limited set of organizations, with broader availability planned over the following days. OpenAI said Astra is state-of-the-art on computer use, browsing, software engineering, cybersecurity, science…

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