GPT-6 Sol rumored for release the week of September 15, 2026
A September 15, 2026 post relayed claims that people using 5.6 Sol were already being routed to GPT-6 Sol, with positive early impressions and reports of very fast performance.
TLDR
Sam Altman's September 15, 2026 teaser—“big 🚢 this week” and “then for devday”—prompted a user to predict a GPT-6 Sol release that week. The user also said they'd heard GPT-6 Luna was coming. Earlier, the same user speculated that Sol would sit below Astra in the lineup but might offer close to Astra's performance at a lower cost.
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