# Claude Haiku 5.5 vs o4-mini

> Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 41.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-haiku-5-5-vs-o4-mini
- Last updated: 2026-10-12
- Shared benchmarks: 6

## Summary

- They share 6 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 5 categories and o4-mini in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 40.8.
- The biggest single-benchmark swing is FrontierMath Tier 4: 46.3% for Claude Haiku 5.5 and 4.9% for o4-mini.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $1.10 / $4.40 for o4-mini.
- Claude Haiku 5.5 accepts more context: 1M tokens versus 200K.

## Snapshot

| | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Noometry Index | 49.5 | 41.6 |
| Rank | 52 | 132 |
| Context | 1M | 200K |
| Input $/M | $0.10 | $1.10 |
| Output $/M | $0.50 | $4.40 |
| Weights | Proprietary | Proprietary |

## Coding

- Claude Haiku 5.5: 49.2 (#50)
- o4-mini: 40.9 (#127)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| SWE-bench Verified (bash only) | — | 45% |
| Aider Polyglot | — | 72% |
| LMArena WebDev | 1587 | — |
| GSO | — | 3.6% |
| WeirdML | — | 52.6% |
| LMArena Coding | — | 1368 |
| CadEval | — | 62% |
| ALE-Bench | — | 826.17 |
| AlgoTune | — | 1.72 |

## Agentic & Tool Use

- Claude Haiku 5.5: —
- o4-mini: 32.6 (#61)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 53.2% |
| GDPval | — | 25.3% |
| METR Time Horizons | — | 63.9% |

## Reasoning

- Claude Haiku 5.5: 35.2 (#69)
- o4-mini: 24.6 (#162)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| Mystery Game Puzzles | 30% | 5% |
| ARC-AGI-2 | — | 6.1% |
| SimpleBench | — | 38.7% |
| Kagi LLM Benchmark | — | 67.6% |
| NYT Connections (extended) | 65.7% | — |
| ARC-AGI-1 | — | 58.7% |
| CritPt | — | 0.6% |
| Chess Puzzles | — | 26% |
| EnigmaEval | — | 9.2% |
| LMArena Hard Prompts | — | 1351 |
| DTBench | — | 77.6% |
| LMCA | — | 26.5% |
| Epoch Capabilities Index | — | 145.64 |
| ForecastBench | — | 61.8 |

## Math

- Claude Haiku 5.5: 73.6 (#18)
- o4-mini: 40.8 (#89)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | 36.1% |
| FrontierMath Tier 4 | 46.3% | 4.9% |
| OTIS Mock AIME 2024-2025 | 98.9% | 81.7% |
| Omni-MATH | — | 72% |
| LMArena Math | — | 1389 |
| MATH Level 5 | — | 97.8% |
| FrontierMath (Feb 2025 set) | — | 24.8% |
| FrontierMath Tier 4 (v1) | — | 6.3% |

## Knowledge

- Claude Haiku 5.5: 50.8 (#70)
- o4-mini: 43.6 (#91)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| GPQA Diamond | 89.6% | 79.6% |
| SimpleQA Verified | 23.8% | 19.6% |
| Humanity's Last Exam | — | 18.1% |
| MMLU-Pro | — | 82% |
| Confabulations | — | 15.8% |
| Vectara Hallucination Rate | — | 18.6% |
| GPQA (HELM) | — | 73.5% |
| LMArena Expert | — | 1343 |

## Multimodal

- Claude Haiku 5.5: 43.7 (#21)
- o4-mini: 40.2 (#49)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| LMArena Vision | — | 1194 |
| GeoBench | — | 64% |
| VPCT | — | 57.5% |
| Furniture Assembly | 47.5% | — |

## Multilingual

- Claude Haiku 5.5: —
- o4-mini: 47.0 (#154)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| LMArena Non-English | — | 1337 |
| LMArena Chinese | — | 1354 |
| LMArena French | — | 1364 |
| LMArena German | — | 1336 |
| LMArena Japanese | — | 1308 |
| LMArena Korean | — | 1312 |
| LMArena Russian | — | 1334 |
| LMArena Spanish | — | 1347 |

## Instruction Following

- Claude Haiku 5.5: —
- o4-mini: 75.2 (#68)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| IFEval | — | 92.8% |
| LMArena Instruction Following | — | 1321 |

## Long Context

- Claude Haiku 5.5: —
- o4-mini: 45.5 (#33)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| Fiction.LiveBench | — | 77.8% |
| LMArena Longer Query | — | 1315 |

## Writing & Preference

- Claude Haiku 5.5: —
- o4-mini: 54.0 (#152)

| Benchmark | Claude Haiku 5.5 | o4-mini |
|---|---|---|
| LMArena Text | — | 1353 |
| LMArena Creative Writing | — | 1294 |
| Short-Story Creative Writing | — | 75% |
| WildBench | — | 85.4% |
| LMArena Multi-Turn | — | 1350 |

## FAQ

### Is Claude Haiku 5.5 better than o4-mini?

Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 41.6 on the Noometry Index.

### Which is cheaper, Claude Haiku 5.5 or o4-mini?

Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; o4-mini lists at $1.10 and $4.40.

### Is Claude Haiku 5.5 or o4-mini better for coding?

Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 40.9 in the Noometry coding category.

### Which has the bigger context window?

Claude Haiku 5.5 does, with 1M tokens against 200K.

### How many benchmarks do Claude Haiku 5.5 and o4-mini share?

6 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and o4-mini has 60.