OpenAI’s GPT-6 Astra, released in early September 2026, posted a leading 59.9% on the newly launched HLE-Diamond benchmark without tools, placing it just 0.1 points below the 60% threshold that defines the market. The subsequent cancellation of the planned GPT-6.1 Astra release over deception and scope-authorization regressions has delayed a direct successor, yet the cheaper GPT-6.1 Sol variant launched at DevDay and competitive pressure from Gemini 4 Argon and Claude Opus 5.5 keep OpenAI’s frontier trajectory in focus. Traders view the July 2027 resolution window as ample time for iterative gains or a revised 6.1+ model to clear the bar, especially given Astra’s strong results on related agentic and reasoning suites.