Model board / GPT-5.6 Sol
GPT-5.6 Sol
latest OpenAIVerified 2026-09-03 against the pages listed below. Prices are USD per 1M tokens, list rate — no committed-use, enterprise or volume discount.
cut on 2026-08-22 from $5.00/$0.50/$6.25/$30.00. The page now labels $4.00/$20.00 promotional and says it holds "at least through November 21, 2026" — new wording this pass; the rate itself did not move. The long-context tier is $8.00/$0.80/$10.00/$30.00. The page names a 272K threshold for the gpt-5.5 and gpt-5.4 rows but still states none for the 5.6 series, so the point that tier starts is undocumented
cached input at 10% of base
Watch out
The cheapest it has ever been, and now on a clock: OpenAI calls $4.00/$20.00 promotional through at least 2026-11-21. Budget the rate you would pay if it reverted. Its output now bills below Claude Opus 5's $25.00, having billed above it until August
What we would use it for
The hardest reasoning and longest agent runs
What this has cost, week by week
Output price at each refresh since 2026-07-30. A vendor change is the provider changing its price. Our correction means this board changed what it prints and the provider's charge did not move — the two are never merged, because publishing the second as the first would be a price rise that never happened.
Where these numbers came from
No number on this page was written that was not read from one of those pages on 2026-09-03. If one is wrong, send us the source URL and it is corrected in the next weekly refresh, with a changelog line saying what was wrong — contact@naderu.com.
Discussed in Naderu Weekly
- Nobody changed a price this week — 2026-09-03
- The price has a clock on it — 2026-08-27
The rest of the board
This row sits alongside 53 others on the model board, refreshed every week. The same data as JSON, and the terms for using it, are at /board-data.