GPT-6 Sol reportedly in internal testing ahead of possible September 29 DevDay launch

Mehdi @MehdiCadeOriginally posted 2026.09.06

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GPT-6 Sol Leaks - OpenAI is now internally testing GPT-6 Sol. It is fast and quite good, though not at the level of Astra. The outputs may not feel as strong, but it should still be a good model. - It could launch at OpenAI DevDay on September 29. - I'm excited for this one. After seeing Astra, Sol could be the middle ground between performance and limit especially for Plus users, with much better usage limits than Astra.