All modelsCalculate what your real prompts cost on GPT-5.1
GPT-5.1
OpenAI model, released 13 Nov 2025.
$1.25
per 1M input tokens
$10.00
per 1M output tokens
$0.125
per 1M cached-read tokens
Price history
Price stable since we started tracking (7 Jul 2026). History will chart here as soon as it moves.
Specifications
- Lab
- OpenAI
- Released
- 13 Nov 2025
- Context window
- 400k tokens
- Max output
- 128k tokens
- Input modalities
- image, text, file
- Output modalities
- text
- Knowledge cutoff
- —
- Open source
- No
Benchmarks
| Benchmark | Category | Score | As of |
|---|---|---|---|
| LMArena (Chatbot Arena) | coding | 1436.5 (1429.8–1443.1) | 12 Aug 2026 |
| LMArena (Chatbot Arena) | overall | 1422.4 (1418.8–1426) | 12 Aug 2026 |
LMArena (Chatbot Arena) data © their authors, CC-BY-4.0
Frequently asked questions
How much does GPT-5.1 cost?
GPT-5.1 costs $1.25 per 1M input tokens and $10.00 per 1M output tokens (list price, updated every 6 hours).
What is GPT-5.1's context window?
GPT-5.1 supports a 400k-token context window with up to 128k output tokens.