# Claude 3.5 Haiku vs o3-pro

> o3-pro is the stronger model overall, scoring 42.9 to 29.2 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-3-5-haiku-vs-o3-pro
- Last updated: 2026-10-12
- Shared benchmarks: 6

## Summary

- They share 6 benchmarks with published results for both. Claude 3.5 Haiku scores higher in 0 categories and o3-pro in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in long context, where o3-pro leads 72.2 to 38.3.
- The biggest single-benchmark swing is Aider Polyglot: 28% for Claude 3.5 Haiku and 84.9% for o3-pro.

## Snapshot

| | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 29.2 | 42.9 |
| Rank | 315 | 105 |
| Context | — | 200K |
| Input $/M | — | $20 |
| Output $/M | — | $80 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude 3.5 Haiku: 32.9 (#265)
- o3-pro: 55.5 (#24)

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| Aider Polyglot | 28% | 84.9% |
| WeirdML | 30.7% | 58.2% |
| SciCode | 27.4% | — |
| BigCodeBench Instruct | 46.1% | — |
| LiveBench Coding | 51.4% | — |
| LMArena Coding | 1286 | — |
| BigCodeBench Complete | 59% | — |
| CadEval | 32% | — |

## Agentic & Tool Use

- Claude 3.5 Haiku: 28.0 (#95)
- o3-pro: —

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| BALROG | 19.3% | — |

## Reasoning

- Claude 3.5 Haiku: 17.7 (#290)
- o3-pro: 23.8 (#171)

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| DTBench | 56.7% | 86.9% |
| Epoch Capabilities Index | 127.15 | 147.42 |
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| CritPt | 0% | — |
| LiveBench Reasoning | 28.1% | — |
| LMArena Hard Prompts | 1251 | — |
| LiveBench Data Analysis | 48.5% | — |
| LMCA | — | 38.5% |
| LiveBench | 43.5% | — |

## Math

- Claude 3.5 Haiku: 14.7 (#300)
- o3-pro: —

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 4.3% | — |
| Omni-MATH | 22.4% | — |
| LiveBench Math | 35.5% | — |
| LMArena Math | 1244 | — |
| MATH Level 5 | 46.4% | — |
| FrontierMath (Feb 2025 set) | 0.3% | — |

## Knowledge

- Claude 3.5 Haiku: 18.7 (#281)
- o3-pro: 29.5 (#238)

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| Confabulations | 36.7% | 14.2% |
| GPQA Diamond | 38.1% | — |
| MMLU-Pro | 60.5% | — |
| Vectara Hallucination Rate | — | 23.3% |
| GPQA (HELM) | 36.3% | — |
| LMArena Expert | 1208 | — |
| MMLU | 74.3% | — |

## Multimodal

- Claude 3.5 Haiku: 26.8 (#117)
- o3-pro: —

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| LMArena Vision | 1092 | — |
| GeoBench | 34% | — |

## Multilingual

- Claude 3.5 Haiku: 40.0 (#218)
- o3-pro: —

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| LMArena Non-English | 1238 | — |
| LMArena Chinese | 1229 | — |
| LMArena French | 1264 | — |
| LMArena German | 1237 | — |
| LMArena Japanese | 1175 | — |
| LMArena Korean | 1173 | — |
| LMArena Russian | 1253 | — |
| LMArena Spanish | 1261 | — |

## Instruction Following

- Claude 3.5 Haiku: 62.9 (#234)
- o3-pro: —

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| LiveBench Instruction Following | 61.9% | — |
| IFEval | 79.2% | — |
| LMArena Instruction Following | 1241 | — |

## Long Context

- Claude 3.5 Haiku: 38.3 (#200)
- o3-pro: 72.2 (#1)

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1261 | — |

## Writing & Preference

- Claude 3.5 Haiku: 42.7 (#234)
- o3-pro: 57.1 (#133)

| Benchmark | Claude 3.5 Haiku | o3-pro |
|---|---|---|
| Short-Story Creative Writing | 73.5% | 84.4% |
| LMArena Text | 1255 | — |
| LMArena Creative Writing | 1233 | — |
| EQ-Bench Creative Writing | 1146 | — |
| WildBench | 76% | — |
| LMArena Multi-Turn | 1265 | — |
| LiveBench Language | 35.4% | — |

## FAQ

### Is Claude 3.5 Haiku better than o3-pro?

o3-pro is the stronger model overall, scoring 42.9 to 29.2 on the Noometry Index.

### Is Claude 3.5 Haiku or o3-pro better for coding?

o3-pro scores higher on coding benchmarks: 55.5 versus 32.9 in the Noometry coding category.

### How many benchmarks do Claude 3.5 Haiku and o3-pro share?

6 benchmarks have published results for both models. Claude 3.5 Haiku has 49 scored results on Noometry and o3-pro has 12.