GPT-5.5 Pro
- In Input modalities: TextImage Out Output modalities: Text
- Reasoning· medium, high, xhigh
- Tool use
- Structured output
Prices
1 offering · prices as listedgpt-5.5-pro| Conditions/ 1M tokens | Input | Output |
|---|---|---|
| Standard | $30.00 | $180.00 |
| Prompts over 272K tokens | $60.00 | $270.00 |
| Flex tier | $15.00 | $90.00 |
| Batch | $15.00 | $90.00 |
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
- 922K
- Knowledge cutoff
- Dec 2025
- Open weights
- —
- Family
- gpt-pro
- Aliases
- gpt-5.5-pro-2026-04-23
- Model ID
Not stated on OpenAI’s pages: reasoning can be off, max thinking budget.
Cited scores
From third-party leaderboards, not measured by us- Epoch Capabilities Index 162.7
#12 of 118 listed models · CI 160–165.6
- Epoch AI · Chess Puzzles 62%
#6 of 85 listed models · xhigh effort · ±4.88
- Epoch AI · FrontierMath Tier 4 v2 78%
#11 of 65 listed models · xhigh effort · ±6.54
- Epoch AI · FrontierMath Tiers 1–3 87.7%
#9 of 84 listed models · xhigh effort · ±1.95
- 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
- changes we made
Changes
All changes →No changes recorded yet.
Sources
- OpenAI API pricing (opens in a new tab) developers.openai.com · checked Nov 9, 2026
- GPT-5.5 Pro model (opens in a new tab) developers.openai.com · checked Nov 8, 2026
- Changelog (opens in a new tab) developers.openai.com · checked Nov 9, 2026
- models.dev: gpt-5.5-pro (community data, MIT) (opens in a new tab) github.com · checked Sep 30, 2026
- GPT-5.5 Pro (opens in a new tab) developers.openai.com · checked Nov 6, 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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