GPT-5.5
- Context
- 1.05M
- 128K max output
- Input price
- $5.00
- per 1M tokens · OpenAI API
- Output price
- $30.00
- per 1M tokens
- Epoch Capabilities Index
- 159.3
- #8 of 71 listed
- LMArena Text
- 1,481
- #16 of 79 listed
Where to run it
3 offerings · prices as listed| Meter | Tier | Price |
|---|---|---|
| Input | Standard | $5.00 / 1M tokens |
| Batch | $2.50 / 1M tokens | |
| Flex tier | $2.50 / 1M tokens | |
| Prompts over 272K tokens | $10.00 / 1M tokens | |
| Fast tier | $12.50 / 1M tokens | |
| Prompts over 272K tokens · Batch | $5.00 / 1M tokens | |
| Prompts over 272K tokens · Flex tier | $5.00 / 1M tokens | |
| Output | Standard | $30.00 / 1M tokens |
| Batch | $15.00 / 1M tokens | |
| Flex tier | $15.00 / 1M tokens | |
| Prompts over 272K tokens | $45.00 / 1M tokens | |
| Fast tier | $75.00 / 1M tokens | |
| Prompts over 272K tokens · Batch | $22.50 / 1M tokens | |
| Prompts over 272K tokens · Flex tier | $22.50 / 1M tokens | |
| Cache read | Standard | $0.50 / 1M tokens |
| Batch | $0.25 / 1M tokens | |
| Flex tier | $0.25 / 1M tokens | |
| Prompts over 272K tokens | $1.00 / 1M tokens | |
| Fast tier | $1.25 / 1M tokens | |
| Prompts over 272K tokens · Batch | $0.50 / 1M tokens | |
| Prompts over 272K tokens · Flex tier | $0.50 / 1M tokens | |
| Input | Standard | $5.00 / 1M tokens |
| Priority tier | $12.50 / 1M tokens | |
| Output | Standard | $30.00 / 1M tokens |
| Priority tier | $75.00 / 1M tokens | |
| Cache read | Standard | $0.50 / 1M tokens |
| Priority tier | $1.25 / 1M tokens | |
| Input | Standard | $5.50 / 1M tokens |
| Priority tier | $13.75 / 1M tokens | |
| Output | Standard | $33.00 / 1M tokens |
| Priority tier | $82.50 / 1M tokens | |
| Cache read | Standard | $0.55 / 1M tokens |
| Priority tier | $1.38 / 1M tokens | |
Cited scores
From third-party leaderboards, not measured by us- Epoch Capabilities Index 159.3
#8 of 71 listed models · CI 157–162.4
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
- LMArena Text 1,481
#16 of 79 listed models · high effort · CI 1,478–1,485 · 69,008 votes
Also listed: gpt-5.5 1,477
LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Sep 25, 2026 · changes we made
- Epoch AI · FrontierMath Tiers 1–3 85.3%
#8 of 56 listed models · xhigh effort · ±2.1
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 · GPQA Diamond 90.7%
#25 of 64 listed models · low effort · ±1.75
Also listed: reasoning off 77.3%
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
- LMArena Text · Chinese 1,527
#18 of 79 listed models · CI 1,517–1,537 · 4,480 votes
Also listed: high effort 1,517
LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Sep 25, 2026 · changes we made
- LMArena Text · Coding 1,519
#27 of 79 listed models · high effort · CI 1,513–1,524 · 19,166 votes
Also listed: gpt-5.5 1,510
LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Sep 25, 2026 · changes we made
- LMArena Vision 1,298
#13 of 49 listed models · CI 1,291–1,304 · 23,423 votes
Also listed: high effort 1,294
LMArena (Arena), leaderboard-dataset on Hugging Face, licensed CC BY 4.0 · License · as of Sep 13, 2026 · changes we made