GPT-5.5 Pro
OpenAIProprietaryReasoningProvisionalReleased Apr 23, 2026Input: file, image, text
Overall score
73.5
Rank 13 of 222 · 59.1–87.8
Context window
1M
1,000,000 tokens
Price per 1M tokens
$30.00 in · $180.00 out
✓ Verified on OpenAI's pricing page
Blended price
$67.50
3:1 input:output tokens
Output speed
—
Not measured yet
Category scores
Scores per capability area with the model's rank among ranked models in that category.
- 1Math94.0
- 2Knowledge82.0
- 3Agentic & tool use80.4
- 4Reasoning78.9
Benchmark results (8)
As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.
Math
| FrontierMath v2 (Tiers 1-3) | 87.719 | #8 of 64 |
| FrontierMath v2 (Tier 4) | 78.049 | #9 of 51 |
| FrontierMath (legacy) | 52.4 | #4 of 7 |
Reasoning
| ARC-AGI-2 | 84.2 | #13 of 41 |
| ARC-AGI-1 | 95.00 | #13 of 36 |
Knowledge
| HLE | 57.2 | #8 of 69 |
| HLE w/o tools | 43.1 | #18 of 43 |
Agentic & tool use
| BrowseComp | 90.1 | #7 of 50 |
Pricing by source
USD per 1M tokens.
| Source | Input | Output | Cached in |
|---|---|---|---|
| ✓ Official (OpenAI) checked Oct 17, 2026 · gpt-5.5-pro | $30.00 | $180.00 | — |
| BenchLM list price | $30.00 | $180.00 | — |
| OpenRouter openai/gpt-5.5-pro | $30.00 | $180.00 | — |
Standard tier, prompts under 272K tokens.
OpenAI's current API pricing page lists gpt-5.5-pro at $30.00 input / $180.00 output per million tokens for short-context requests and does not list a cached-input rate.
Speed
Measured by us through OpenRouter (median of trials).
Not measured yet.
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