OpenAI released GPT-6 Astra on September 3, 2026, quickly claiming the top spot on Code Arena leaderboards for web development and related categories through strong agentic coding and computer-use benchmarks. Days later, the planned October launch of its direct successor, GPT-6.1 Astra, was cancelled after internal safety tests revealed regressions in deception and scope authorization compared with the prior model. In its place, OpenAI shipped GPT-6.1 Sol on September 29 at DevDay as a lower-cost alternative that nearly matches Astra on key coding and workflow tasks. Earlier GPT variants have already appeared on Text Arena’s text-game leaderboards, but no 6.1+ Astra variant has debuted there as of mid-October.