# Claude 3 Haiku vs GPT-5.5 Pro

> GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 25.9 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-haiku-vs-gpt-5-5-pro
- Last updated: 2026-10-12
- Shared benchmarks: 5

## Summary

- They share 5 benchmarks with published results for both. Claude 3 Haiku scores higher in 0 categories and GPT-5.5 Pro in 3 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 9.8.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 1.8% for Claude 3 Haiku and 100% for GPT-5.5 Pro.

## Snapshot

| | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 25.9 | 64.3 |
| Rank | 340 | 8 |
| Context | — | 1.05M |
| Input $/M | — | $30 |
| Output $/M | — | $180 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3 Haiku: 26.4 (#325)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| WeirdML | 9.8% | — |
| BigCodeBench Instruct | 39.4% | — |
| LMArena Coding | 1199 | — |
| BigCodeBench Complete | 50.1% | — |
| CadEval | 12% | — |
| HumanEval+ | 68.9% | — |
| MBPP+ | 68.8% | — |

## Reasoning

- Claude 3 Haiku: 16.3 (#307)
- GPT-5.5 Pro: 73.3 (#10)

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| DTBench | 50.1% | 96% |
| LMCA | 8.8% | 53.9% |
| Epoch Capabilities Index | 118.35 | 162.07 |
| ARC-AGI-2 | — | 84.6% |
| SimpleBench | — | 76.9% |
| Kagi LLM Benchmark | 34.2% | — |
| ARC-AGI-1 | — | 96.5% |
| CritPt | — | 30.6% |
| Chess Puzzles | — | 64% |
| LMArena Hard Prompts | 1174 | — |
| ForecastBench | 53.2 | — |
| WinoGrande | 74.2% | — |

## Math

- Claude 3 Haiku: 9.8 (#319)
- GPT-5.5 Pro: 84.0 (#10)

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 1.8% | 100% |
| FrontierMath (Tiers 1-3) | — | 87.7% |
| FrontierMath Tier 4 | — | 78% |
| LMArena Math | 1188 | — |
| MATH Level 5 | 14.9% | — |
| FrontierMath (Feb 2025 set) | — | 52.4% |
| FrontierMath Tier 4 (v1) | — | 39.6% |

## Knowledge

- Claude 3 Haiku: 17.3 (#285)
- GPT-5.5 Pro: 64.1 (#19)

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | 36.3% | 93.9% |
| Confabulations | 34.2% | — |
| LMArena Expert | 1148 | — |
| MMLU | 73.8% | — |

## Multimodal

- Claude 3 Haiku: 23.6 (#128)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| LMArena Vision | 950 | — |
| ScienceQA | 72% | — |

## Multilingual

- Claude 3 Haiku: 36.0 (#243)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| LMArena Non-English | 1178 | — |
| LMArena Chinese | 1155 | — |
| LMArena French | 1195 | — |
| LMArena German | 1174 | — |
| LMArena Japanese | 1102 | — |
| LMArena Korean | 1109 | — |
| LMArena Russian | 1204 | — |
| LMArena Spanish | 1166 | — |

## Instruction Following

- Claude 3 Haiku: 61.3 (#247)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| LMArena Instruction Following | 1173 | — |

## Long Context

- Claude 3 Haiku: 36.1 (#237)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| LMArena Longer Query | 1190 | — |

## Writing & Preference

- Claude 3 Haiku: 29.7 (#291)
- GPT-5.5 Pro: —

| Benchmark | Claude 3 Haiku | GPT-5.5 Pro |
|---|---|---|
| LMArena Text | 1195 | — |
| LMArena Creative Writing | 1157 | — |
| EQ-Bench Creative Writing | 717 | — |
| LMArena Multi-Turn | 1190 | — |

## FAQ

### Is Claude 3 Haiku better than GPT-5.5 Pro?

GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 25.9 on the Noometry Index.

### How many benchmarks do Claude 3 Haiku and GPT-5.5 Pro share?

5 benchmarks have published results for both models. Claude 3 Haiku has 37 scored results on Noometry and GPT-5.5 Pro has 14.