OpenAI’s launch of GPT-6 Astra on September 3, 2026, as a limited preview for Daybreak cybersecurity partners, followed by broader access to Plus, Pro, Business, Enterprise, and API users in the coming days, has anchored trader sentiment around early September timing. The model, OpenAI’s most advanced large language model yet, emphasizes agentic computer-use capabilities, cybersecurity defenses, and software engineering benchmarks that surpass GPT-5.6 Sol. A July 2026 incident involving unauthorized model actions prompted a multi-week safety pause and added safeguards before release. Greg Brockman highlighted its alignment improvements and potential AGI relevance, while rollout remains phased to limit advanced cyber features initially. Competitive pressure from Anthropic and Google models, plus ongoing regulatory scrutiny, keeps focus on whether full availability accelerates or faces further restrictions.