GPT-5.5 Pro
Model ID
- Context
- 1.05M
- 128K max output
- Input price
- $30.00
- per 1M tokens · OpenAI API
- Output price
- $180.00
- per 1M tokens
- Epoch Capabilities Index
- 162.5
- #5 of 71 listed
- LMArena Text
- —
- Not listed
Where to run it
1 offering · prices as listed| Meter | Tier | Price |
|---|---|---|
| Input | Standard | $30.00 / 1M tokens |
| Batch | $15.00 / 1M tokens | |
| Flex tier | $15.00 / 1M tokens | |
| Prompts over 272K tokens | $60.00 / 1M tokens | |
| Output | Standard | $180.00 / 1M tokens |
| Batch | $90.00 / 1M tokens | |
| Flex tier | $90.00 / 1M tokens | |
| Prompts over 272K tokens | $270.00 / 1M tokens | |
Cited scores
From third-party leaderboards, not measured by us- Epoch Capabilities Index 162.5
#5 of 71 listed models · CI 159.2–166.6
Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks'. Licensed CC BY 4.0. · License · as of Sep 26, 2026 · changes we made
- Epoch AI · FrontierMath Tiers 1–3 87.7%
#4 of 56 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 Sep 26, 2026 · changes we made