GPT-5.1
- In Input modalities: TextImage Out Output modalities: Text
- Reasoning· none, low, medium, high
- Reasoning can be off
- Tool use
- Structured output
Prices
3 offerings · prices as listed OpenAI API (opens in a new tab)
gpt-5.1| Conditions/ 1M tokens | Input | Cache read | Output |
|---|---|---|---|
| Standard | $1.25 | $0.125 | $10.00 |
| Flex tier | $0.625 | $0.0625 | $5.00 |
| Fast tier | $2.50 | $0.25 | $20.00 |
| Batch | $0.625 | $0.0625 | $5.00 |
Prices from OpenAI API pricing (opens in a new tab) (checked Nov 9, 2026)
Standard: the price a request with no conditions pays (the headline price elsewhere on the site).
Details
- Max input
- 272K
- Built-in tools
- Web search, File search
- Knowledge cutoff
- Sep 2024
- Open weights
- —
- Family
- gpt
- Aliases
- gpt-5.1-2025-11-13
- Model ID
Not stated on OpenAI’s pages: max thinking budget.
Cited scores
From third-party leaderboards, not measured by us- Epoch Capabilities Index 150.9
#57 of 118 listed models · CI 149.4–152.5
- LMArena Text 1,456
#46 of 163 listed models · high effort · CI 1,452–1,459 · 41,414 votes
Also listed: GPT-5.1 1,439
- Epoch AI · Chess Puzzles 42%
#32 of 85 listed models · high effort · ±4.96
Also listed: low effort 23% · reasoning off 6%
- Epoch AI · GPQA Diamond 87.6%
#57 of 168 listed models · high effort · ±1.88
Also listed: medium effort 85% · reasoning off 66.7%
- Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Oct 7 – Nov 5, 2026
- LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Nov 8, 2026
- changes we made
News
All news →- Oct 1, 2026Retirement OpenAI deprecates TTS-1, TTS-1 HD, GPT-5.4 nano and 2 more TTS-1, TTS-1 HD, GPT-5.4 nano, GPT-5.3-Codex and GPT-5.1 are now deprecated and shut down on 2027-01-06.
Changes
All changes →- 3 prices dropped on OpenAI API Input (Flex tier, Batch) $0.625 · Output (Flex tier, Batch) $5.00 · Cache read (Flex tier, Batch) $0.0625
- 3 new prices on OpenAI API Input (Flex tier, Batch) $0.625 · Output (Flex tier, Batch) $5.00 · Cache read (Flex tier, Batch) $0.0625
- Available → Deprecated
Sources
- Azure OpenAI pricing (opens in a new tab) azure.microsoft.com · checked Nov 8, 2026
- OpenAI API pricing (opens in a new tab) developers.openai.com · checked Nov 9, 2026
- GPT-5.1 model (opens in a new tab) developers.openai.com · checked Nov 4, 2026
- Changelog (opens in a new tab) developers.openai.com · checked Nov 9, 2026
- Azure AI Foundry: model retirement schedule (opens in a new tab) learn.microsoft.com · checked Nov 7, 2026
- GPT-5.1 prompting guide (opens in a new tab) developers.openai.com · checked Nov 5, 2026
- Deprecations (opens in a new tab) developers.openai.com · checked Nov 8, 2026
- GPT-5.1 (opens in a new tab) developers.openai.com · checked Nov 4, 2026
- GPT-5.1 Chat (opens in a new tab) developers.openai.com · checked Nov 5, 2026
OpenAI’s official policies: data use, privacy, terms →
OpenAI · United States · openai.com
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