GPT-5.5
- In Input modalities: TextImage Out Output modalities: Text
- Reasoning· none, low, medium, high, xhigh
- Reasoning can be off
- Tool use
- Structured output
Prices
3 offerings · prices as listedgpt-5.5| Conditions/ 1M tokens | Input | Cache read | Output |
|---|---|---|---|
| Standard | $5.00 | $0.50 | $30.00 |
| Prompts over 272K tokens | $10.00 | $1.00 | $45.00 |
| Flex tier | $2.50 | $0.25 | $15.00 |
| Fast tier | $12.50 | $1.25 | $75.00 |
| Batch | $2.50 | $0.25 | $15.00 |
| Prompts over 272K tokensFlex tier | $5.00 | $0.50 | $22.50 |
| Prompts over 272K tokensBatch | $5.00 | $0.50 | $22.50 |
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
- 922K
- Knowledge cutoff
- Dec 2025
- Open weights
- —
- Family
- gpt
- Aliases
- gpt-5.5-2026-04-23
- Model ID
Not stated on OpenAI’s pages: max thinking budget, built-in tools.
Cited scores
From third-party leaderboards, not measured by us- Epoch Capabilities Index 160
#17 of 118 listed models · CI 158.1–162.2
- LMArena Text 1,481
#23 of 163 listed models · high effort · CI 1,478–1,485 · 68,361 votes
Also listed: GPT-5.5 1,476
- Epoch AI · Chess Puzzles 63%
#5 of 85 listed models · xhigh effort · ±4.85
Also listed: low effort 30% · reasoning off 9%
- Epoch AI · EBR-bench 34.3%
#12 of 28 listed models · xhigh effort · ±1.98
- Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Oct 28 – Nov 5, 2026
- LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Nov 8, 2026
- EQ-Bench by Samuel J. Paech (eqbench.com; EQ-bench/EQ-bench-site on GitHub), MIT License. · License · as of Oct 24 – 28, 2026
- LiveBench (White et al.), release 2026-06-25, livebench.ai, licensed CC BY-SA 4.0. This board, adapted from it, is shared under CC BY-SA 4.0. · License · as of Jun 25, 2026
- changes we made
Changes
All changes →No changes recorded yet.
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-5.5 (opens in a new tab) developers.openai.com · checked Nov 9, 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 10, 2026
- models.dev: gpt-5.5 (community data, MIT) (opens in a new tab) github.com · checked Sep 30, 2026
- GPT-5.5 (opens in a new tab) developers.openai.com · checked Nov 3, 2026
OpenAI’s official policies: data use, privacy, terms →
Some values on this page are still waiting to be checked against official pages: a filled dot is verified, a hollow one is not yet (with or without a source on file). How we verify data
OpenAI · United States · openai.com
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