GPT-5.6 Sol Is $20 Until Nov 21. Budget Both Rates.
OpenAI cut GPT-5.6 Sol to $4/$20 per million tokens but guarantees the rate only "at least through November 21, 2026," with no successor published. The cut was asymmetric, so no two workloads saved the same amount — and the reversion is +50% on output, not +33%.
August 24, 2026 · 12 min read