GPT-5.6 Sol
GPT-5.6 Sol is the main professional-work model in the GPT-5.6 family. The shorter gpt-5.6 alias also routes to this model.
The reviewed price has an end date
Its $4 input and $20 output rates per million tokens are promotional through 30 November 2026. Inputs above 272,000 tokens change the full-request rates. Reasoning includes none through max, with medium as the default.GPT-5.6 Sol official model documentation
Keep price dates with cost estimates
Practical guidance. When comparing an existing workflow, record the number of input, cached and output tokens as well as the rate date. Separate a temporary price advantage from a lasting reduction in token use. Review costs again when promotional terms end.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | gpt-5.6-solgpt-5.6 |
| Context window | 1,050,000 tokens Published model context; input and output share this budget GPT-5.6 Sol official model documentation |
| Maximum output | 128,000 tokens Published maximum output; bounded by the remaining context GPT-5.6 Sol official model documentation |
| Input price | 4 USD per million tokens Standard text processing; inputs up to 272,000 tokens; promotional rates through 30 November 2026 GPT-5.6 Sol official model documentation |
| Output price | 20 USD per million tokens Standard text processing; inputs up to 272,000 tokens; promotional rates through 30 November 2026 GPT-5.6 Sol official model documentation |
| Input and output | text, image in; text outGPT-5.6 Sol official model documentation |
| Maximum input | 922,000 tokensGPT-5.6 Sol official model documentation |
| API routes | Chat Completions (v1/chat/completions); Responses (v1/responses); Batch (v1/batch)GPT-5.6 Sol official model documentation |
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