GPT-5.1: price, context window and licence
| Input | $1.25 per million tokens |
|---|---|
| Output | $10 per million tokens |
| Cached input | $0.13 per million tokens |
| Context window | 400K tokens |
| Licence | |
| Vendor | OpenAI |
Where these figures come from
Taken from the OpenRouter model registry, which lists what providers charge per token, and converted to a per-million rate. Checked 30 Oct 2026. Where OpenRouter publishes no cache-read rate, the cell above is blank rather than inferred.