GPT-5.6 Sol

Price history

Sol’s published promotional rates are available at least through November 21, 2026. Prompts above 272K input tokens have higher rates; cache writes and tools can add charges.

When live checks began

These are the earliest and latest successful checks we can prove from our retained polling records. Reconstructing an older price never moves these timestamps backward.

A baseline of these monitoring records was preserved on 2026-09-18. The current checks below may be newer.

Launches & price changes

A reconstruction from dated sources. The effective date, publication date, and date we added the evidence are recorded separately. Coverage is incomplete; an absent event does not prove nothing changed.

1. 2026-08-21Promotionstandard

   Sol promotional standard text rates $4/$20, cached reads $0.40. Available at least through November 21, 2026; no exact end or reversion date is asserted.

   USD / 1M tokens: input $4 · output $20 · cached input $0.4

   Published 2026-08-21 · Added to our history 2026-09-18

   • OpenAI — Sol promotional standard text rates $4/$20, cached reads $0.40. Available at least through November 21, 2026; no exact end or reversion date is asserted.
   • OpenAI — Sol promotional standard text rates $4/$20, cached reads $0.40. Available at least through November 21, 2026; no exact end or reversion date is asserted.
2. 2026-07-09

Benchmarks

Results depend on reasoning effort, tools, and evaluation setup. Check the original report before comparing scores across models.