Back to GPT-5.6 Sol pricing
GPT-5.6 Sol price history
Every tracked change to GPT-5.6 Sol token pricing on the OpenAI API — input, output, and cached-input rates per million tokens. Data goes back to July 12, 2026.
Price per million tokens
Price change events
| Date | Direction | Input | Output | Notes |
|---|---|---|---|---|
| October 13, 2026 | Increase | $4 → $5/M (+$1) | $20 → $30/M (+$10) | Input $4 -> $5, Output $20 -> $30, Cache Read $0.40 -> $0.50 per https://openai.com/api/pricing/ (standard, context under 270K). Note: developers.openai.com/api/docs/pricing lists only 'gpt-5.6-sol (Cyber)' at $4/$20, a differently labelled SKU; promo status ambiguous, previously flip-flopped 10-04 / 10-12. |
| October 12, 2026 | Decrease | $5 → $4/M (−$1) | $30 → $20/M (−$10) | Input $5 → $4, output $30 → $20, cache read $0.50 → $0.40. Reverts the 2026-10-04 'promo ended early' entry: OpenAI's model page, pricing page and changelog (developers.openai.com) all show the promo rate running through at least 2026-11-21; corroborated by orcarouter.ai + actuia.com (2026-10-06). |
| October 4, 2026 | Increase | $4 → $5/M (+$1) | $20 → $30/M (+$10) | Input $4 -> $5, output $20 -> $30, cache read $0.40 -> $0.50 per MTok. Read directly from openai.com/api/pricing. The August 2026 promotional cut was advertised as running through at least 2026-11-21 but has ended roughly seven weeks early. Luna and Terra re-read on the same page and unchanged, so this is flagship-only. Sol is again more expensive than Claude Opus 5 on both input and output. |
| August 31, 2026 | Decrease | $4/M | $20/M | Cache read fell $0.50 -> $0.40/MTok, tracking the 2026-08-21 20% input cut (cache reads bill at 1/10th of the $4 input rate). Input $4 and output $20 unchanged. Source: cellcog.ai + orcarouter.ai + openrouter.ai GPT-5.6 Sol pages. |
| August 21, 2026 | Decrease | $5 → $4/M (−$1) | $30 → $20/M (−$10) | OpenAI cut Sol >20% (input $5 -> $4, output $30 -> $20). Promotional through 2026-11-21. Sol now cheaper than Claude Opus 5. Applies to API + Codex credits + eligible ChatGPT Work plans. Source: enterprisedna.co + technology.org 2026-08-24. |
Full snapshot log
| Snapshot date | Input / 1M | Output / 1M | Cached input / 1M |
|---|---|---|---|
| October 13, 2026 | $5 | $30 | $0.5 |
| October 12, 2026 | $4 | $20 | $0.4 |
| October 4, 2026 | $5 | $30 | $0.5 |
| August 31, 2026 | $4 | $20 | $0.4 |
| August 21, 2026 | $4 | $20 | — |
| July 13, 2026 | $5 | $30 | $0.5 |
| July 12, 2026 | $5 | $30 | $0.5 |