OpenAI, proprietary

# GPT-5.5 Pro

> GPT-5.5 Pro by OpenAI, released April 2026. Ranked #8 of 354 with a Noometry Index of 64.3. API: $30 in / $180 out per M tokens. 1.05M context. Scores, sources and comparisons.
- Canonical page: https://noometry.com/models/gpt-5-5-pro
- Last updated: 2026-10-10
- Title: GPT-5.5 Pro Benchmarks, Price & Rank (October 2026)

GPT-5.5 Pro by OpenAI ranks 8th of 354 ranked models on the Noometry Index as of October 2026, with a score of 64.3. Its strongest category is math, where it ranks 10th. API pricing starts at $30 per million input tokens and $180 per million output tokens, with a 1.05M-token context window.

Last verified October 10, 2026

## Specifications

- **Noometry rank:** #8 of 354
- **Index score:** 64.3
- **Evidence:** Confirmed 14 results
- **Provider:** [OpenAI](https://noometry.com/providers/openai)
- **Released:** April 23, 2026
- **Weights:** Proprietary
- **Reasoning:** Yes
- **Context window:** 1.05M
- **Max output:** 128K
- **Input price:** $30 / M
- **Output price:** $180 / M
- **Blended price:** $67.50 / M
- **Output speed:** Not measured
- **Value:** #215 of 219
- **Knowledge cutoff:** December 2025
- **Input:** text, image, pdf

## Category scores

Each category score combines every public result we have in that category.

GPT-5.5 Pro category scores

1.  Reasoning 73.3
2.  Math 84.0
3.  Knowledge 64.1
4.  606570758085

GPT-5.5 Pro category ranks
| Category | Score | Rank | Results |
| --- | --- | --- | --- |
| [Reasoning](https://noometry.com/best/reasoning) | 73.3 | #10 | 7 |
| [Math](https://noometry.com/best/math) | 84.0 | #10 | 3 |
| [Knowledge](https://noometry.com/best/knowledge) | 64.1 | #19 | 1 |

## Strengths and weaknesses

Categories where GPT-5.5 Pro places highest and lowest among the models ranked in each, with its score against that category's median.

### Strongest categories

GPT-5.5 Pro: strongest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Reasoning](https://noometry.com/best/reasoning) | 73.3 | +49.7 | #10 of 350, top 3% |

### Weakest categories

GPT-5.5 Pro: weakest categories
| Category | Score | vs median | Rank |
| --- | --- | --- | --- |
| [Knowledge](https://noometry.com/best/knowledge) | 64.1 | +26.8 | #19 of 314, top 7% |

## Closest competitors

The models ranked just above and below GPT-5.5 Pro. When scores are this close, price and speed are often the better way to choose.

Models ranked closest to GPT-5.5 Pro
| Model | Rank | Score | Blended $/M | Speed |  |
| --- | --- | --- | --- | --- | --- |
| [Claude Opus 5](https://noometry.com/models/claude-opus-5) | #4 | 67.8 | $10 | — | [Compare](https://noometry.com/compare/claude-opus-5-vs-gpt-5-5-pro) |
| [Claude Fable 5](https://noometry.com/models/claude-fable-5) | #5 | 66.8 | $20 | 25 | [Compare](https://noometry.com/compare/claude-fable-5-vs-gpt-5-5-pro) |
| [GPT-6.1 Sol](https://noometry.com/models/gpt-6-1-sol) | #6 | 65.6 | $4 | — | [Compare](https://noometry.com/compare/gpt-5-5-pro-vs-gpt-6-1-sol) |
| [GPT-5.6 Sol](https://noometry.com/models/gpt-5-6-sol) | #7 | 65.0 | $8 | 10 | [Compare](https://noometry.com/compare/gpt-5-5-pro-vs-gpt-5-6-sol) |
| [GPT-5.5](https://noometry.com/models/gpt-5-5) | #9 | 63.4 | $11.25 | 25 | [Compare](https://noometry.com/compare/gpt-5-5-vs-gpt-5-5-pro) |
| [Claude Sonnet 5.5](https://noometry.com/models/claude-sonnet-5-5) | #10 | 61.9 | $4 | — | [Compare](https://noometry.com/compare/claude-sonnet-5-5-vs-gpt-5-5-pro) |
| [Gemini 3.8 Flash](https://noometry.com/models/gemini-3-8-flash) | #11 | 61.8 | $1.50 | — | [Compare](https://noometry.com/compare/gemini-3-8-flash-vs-gpt-5-5-pro) |
| [GPT-6 Sol](https://noometry.com/models/gpt-6-sol) | #12 | 61.8 | $4 | — | [Compare](https://noometry.com/compare/gpt-5-5-pro-vs-gpt-6-sol) |

Sponsored placements are available on pages like this one. [Advertise on Noometry](https://noometry.com/advertise)

## Benchmark results

Every published result we track, with its source. Bold rows are the ones used for ranking; where several exist we prefer independent runs over self-reported numbers.

### Reasoning

GPT-5.5 Pro Reasoning benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [ARC-AGI-2](https://noometry.com/benchmarks/arc-agi-2) | 84.6% | #13 of 83, top 16% | high | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [ARC-AGI-2](https://noometry.com/benchmarks/arc-agi-2) | 84.2% |  | xhigh | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [SimpleBench](https://noometry.com/benchmarks/simplebench) | 76.9% | #4 of 77, top 6% |  | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [SimpleBench](https://noometry.com/benchmarks/simplebench) | 76.9% |  | high | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [ARC-AGI-1](https://noometry.com/benchmarks/arc-agi-1) | 96.5% | #10 of 83, top 13% | high | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [ARC-AGI-1](https://noometry.com/benchmarks/arc-agi-1) | 95% |  | xhigh | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [CritPt](https://noometry.com/benchmarks/critpt) | 30.6% | #8 of 134, top 6% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [Chess Puzzles](https://noometry.com/benchmarks/chess-puzzles) | 64% | #2 of 129, top 2% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-05-01 |
| [DTBench](https://noometry.com/benchmarks/dtbench) | 96% | #13 of 151, top 9% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [LMCA](https://noometry.com/benchmarks/lmca) | 53.9% | #13 of 125, top 11% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) |  |
| [Epoch Capabilities Index](https://noometry.com/benchmarks/epoch-capabilities-index) | 162.07 | #8 of 213, top 4% |  | [Epoch AI](https://epoch.ai/eci) | 2026-04-23 |

### Math

GPT-5.5 Pro Math benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [FrontierMath (Tiers 1-3)](https://noometry.com/benchmarks/frontiermath) | 87.7% | #8 of 81, top 10% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-06-12 |
| [FrontierMath Tier 4](https://noometry.com/benchmarks/frontiermath-tier-4) | 78% | #9 of 63, top 15% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-06-12 |
| [OTIS Mock AIME 2024-2025](https://noometry.com/benchmarks/otis-mock-aime) | 100% | #6 of 173, top 4% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-24 |
| [FrontierMath (Feb 2025 set)](https://noometry.com/benchmarks/frontiermath-2025-02) | 52.4% | Best of 68 | high | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-23 |
| [FrontierMath (Feb 2025 set)](https://noometry.com/benchmarks/frontiermath-2025-02) | 51% |  | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-23 |
| [FrontierMath Tier 4 (v1)](https://noometry.com/benchmarks/frontiermath-tier-4-v1) | 39.6% | #2 of 55, top 4% | high | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-23 |
| [FrontierMath Tier 4 (v1)](https://noometry.com/benchmarks/frontiermath-tier-4-v1) | 39.6% |  | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-23 |

### Knowledge

GPT-5.5 Pro Knowledge benchmark results
| Benchmark | Score | Position | Setting | Source | Date |
| --- | --- | --- | --- | --- | --- |
| [GPQA Diamond](https://noometry.com/benchmarks/gpqa-diamond) | 93.9% | #12 of 186, top 7% | xhigh | [Epoch AI](https://epoch.ai/benchmarks) | 2026-04-24 |

## API pricing by provider

GPT-5.5 Pro API prices
| Route | Input $/M | Output $/M | Cached input $/M | Checked |
| --- | --- | --- | --- | --- |
| [openai](https://platform.openai.com/docs/models) | $30 | $180 | — | 2026-10-10 |
| [openrouter](https://openrouter.ai/openai/gpt-5.5-pro) | $30 | $180 | — | 2026-10-10 |

[All OpenAI API prices →](https://noometry.com/llm-pricing/openai) [Estimate your cost →](https://noometry.com/tools/cost-calculator)

## Compare GPT-5.5 Pro

-   [GPT-5.5 Pro vs GPT-5.4 Pro](https://noometry.com/compare/gpt-5-4-pro-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs GPT-5.6 Sol](https://noometry.com/compare/gpt-5-5-pro-vs-gpt-5-6-sol)
-   [GPT-5.5 Pro vs GPT-5.5](https://noometry.com/compare/gpt-5-5-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs GPT-6.1 Sol](https://noometry.com/compare/gpt-5-5-pro-vs-gpt-6-1-sol)
-   [GPT-5.5 Pro vs Claude Sonnet 5.5](https://noometry.com/compare/claude-sonnet-5-5-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs Claude Fable 5](https://noometry.com/compare/claude-fable-5-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs Gemini 3.8 Flash](https://noometry.com/compare/gemini-3-8-flash-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs Claude Fable 5.1](https://noometry.com/compare/claude-fable-5-1-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs Kimi K3](https://noometry.com/compare/gpt-5-5-pro-vs-kimi-k3)
-   [GPT-5.5 Pro vs Grok 4.6](https://noometry.com/compare/gpt-5-5-pro-vs-grok-4-6)
-   [GPT-5.5 Pro vs Qwen3.8 Max](https://noometry.com/compare/gpt-5-5-pro-vs-qwen3-8-max)
-   [GPT-5.5 Pro vs GLM-5.3](https://noometry.com/compare/glm-5-3-vs-gpt-5-5-pro)
-   [GPT-5.5 Pro vs Muse Spark 1.3](https://noometry.com/compare/gpt-5-5-pro-vs-muse-spark-1-3)
-   [GPT-5.5 Pro vs DeepSeek V4 Pro](https://noometry.com/compare/deepseek-v4-pro-vs-gpt-5-5-pro)

## Other OpenAI models

-   [GPT-6 Astra](https://noometry.com/models/gpt-6-astra)70.8
-   [GPT-6.1 Sol](https://noometry.com/models/gpt-6-1-sol)65.6
-   [GPT-5.6 Sol](https://noometry.com/models/gpt-5-6-sol)65.0
-   [GPT-5.5](https://noometry.com/models/gpt-5-5)63.4
-   [GPT-6 Sol](https://noometry.com/models/gpt-6-sol)61.8
-   [GPT-5.4](https://noometry.com/models/gpt-5-4)59.4
-   [GPT-5.6 Terra](https://noometry.com/models/gpt-5-6-terra)59.2
-   [GPT-5.4 Pro](https://noometry.com/models/gpt-5-4-pro)58.9

## Frequently asked questions

### How good is GPT-5.5 Pro?

GPT-5.5 Pro by OpenAI ranks 8th of 354 ranked models on the Noometry Index as of October 2026, with a score of 64.3. Its strongest category is math, where it ranks 10th. API pricing starts at $30 per million input tokens and $180 per million output tokens, with a 1.05M-token context window.

### How much does GPT-5.5 Pro cost?

GPT-5.5 Pro costs $30 per million input tokens and $180 per million output tokens on OpenAI's own API.

### What is GPT-5.5 Pro's context window?

GPT-5.5 Pro accepts up to 1.05M tokens of input and can write up to 128K tokens in one response.

### Is GPT-5.5 Pro open source?

No. GPT-5.5 Pro is proprietary and available only through OpenAI's API and partner platforms.

### What are GPT-5.5 Pro's strengths and weaknesses?

Relative to other ranked models, GPT-5.5 Pro places best in reasoning and lowest in knowledge.

### What is GPT-5.5 Pro best at?

Its best category is math, where it ranks 10th on Noometry.

### Cite this page

Noometry. (2026). GPT-5.5 Pro benchmarks and pricing. Retrieved October 10, 2026, from https://noometry.com/models/gpt-5-5-pro

Quote Noometry with a link back to this page. It is also available in [Markdown](https://noometry.com/md/models/gpt-5-5-pro.md).