GPT-6 Astra and GPT-6.1 Sol reported to now run 50% faster

OpenAI’s two headline models just got a lot quicker. According to a post on X, GPT-6 Astra and GPT-6.1 Sol are now 50% faster across products that use Sign in with ChatGPT. What changed, and where The speed increase is not limited to OpenAI’s own chat app. It covers products built on Sign in with ChatGPT, the login feature that lets users bring their ChatGPT account into third-party apps. The research findings describe Sign in with ChatGPT as a way to improve third-party app accessibility for users. A 50% speed bump makes that pitch easier for developers to sell. Both models named in the update sit at different points on OpenAI’s lineup. Astra is the flagship. Sol is the cheaper sibling that has been closing the gap fast. A month of rapid releases GPT-6 Astra arrived in September 2026. GPT-6 Sol followed on September 22. Then, just one week later, OpenAI unveiled GPT-6.1 Sol at its DevDay event on September 29. GPT-6.1 Sol was pitched as a direct rival to Astra, aimed at coding and professional workflows. Its main selling point is price. The model costs $2 per million tokens for input and output. Astra costs $10 per million tokens. So Sol runs at one-fifth of Astra’s token cost. Ac...