# Claude Haiku 5.5 vs Mistral Small 3

> Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 31.2 on the Noometry Index. Mistral Small 3 costs 3.5× less per token, which makes it the better buy when Claude Haiku 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-haiku-5-5-vs-mistral-small-3
- Last updated: 2026-10-12
- Shared benchmarks: 2

## Summary

- They share 2 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 4 categories and Mistral Small 3 in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 16.3.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 98.9% for Claude Haiku 5.5 and 6.7% for Mistral Small 3.
- Mistral Small 3 is cheaper at $0.05 / $0.08 per million input/output tokens, against $0.10 / $0.50 for Claude Haiku 5.5.
- Claude Haiku 5.5 accepts more context: 1M tokens versus 33K.
- Mistral Small 3 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 49.5 | 31.2 |
| Rank | 52 | 278 |
| Context | 1M | 33K |
| Input $/M | $0.10 | $0.05 |
| Output $/M | $0.50 | $0.08 |
| Weights | Proprietary | Open |

## Coding

- Claude Haiku 5.5: 49.2 (#50)
- Mistral Small 3: 36.5 (#207)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| LMArena WebDev | 1587 | — |
| BigCodeBench Instruct | — | 45.3% |
| LMArena Coding | — | 1246 |
| BigCodeBench Complete | — | 50.4% |

## Reasoning

- Claude Haiku 5.5: 35.2 (#69)
- Mistral Small 3: 18.9 (#273)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| NYT Connections (extended) | 65.7% | — |
| Chess Puzzles | — | 0% |
| LMArena Hard Prompts | — | 1233 |
| Mystery Game Puzzles | 30% | — |
| Epoch Capabilities Index | — | 127.07 |

## Math

- Claude Haiku 5.5: 73.6 (#18)
- Mistral Small 3: 16.3 (#295)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 98.9% | 6.7% |
| FrontierMath (Tiers 1-3) | 75.1% | — |
| FrontierMath Tier 4 | 46.3% | — |
| LMArena Math | — | 1240 |

## Knowledge

- Claude Haiku 5.5: 50.8 (#70)
- Mistral Small 3: 25.1 (#263)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| GPQA Diamond | 89.6% | 47.3% |
| SimpleQA Verified | 23.8% | — |
| Confabulations | — | 25.2% |
| LMArena Expert | — | 1202 |

## Multimodal

- Claude Haiku 5.5: 43.7 (#21)
- Mistral Small 3: —

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| Furniture Assembly | 47.5% | — |

## Multilingual

- Claude Haiku 5.5: —
- Mistral Small 3: 37.3 (#236)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| LMArena Non-English | — | 1198 |
| LMArena Chinese | — | 1204 |
| LMArena French | — | 1203 |
| LMArena German | — | 1211 |
| LMArena Japanese | — | 1111 |
| LMArena Korean | — | 1188 |
| LMArena Russian | — | 1216 |

## Instruction Following

- Claude Haiku 5.5: —
- Mistral Small 3: 63.7 (#229)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| LMArena Instruction Following | — | 1214 |

## Long Context

- Claude Haiku 5.5: —
- Mistral Small 3: 37.8 (#211)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| LMArena Longer Query | — | 1246 |

## Writing & Preference

- Claude Haiku 5.5: —
- Mistral Small 3: 32.2 (#280)

| Benchmark | Claude Haiku 5.5 | Mistral Small 3 |
|---|---|---|
| LMArena Text | — | 1234 |
| LMArena Creative Writing | — | 1195 |
| EQ-Bench Creative Writing | — | 707 |
| LMArena Multi-Turn | — | 1217 |

## FAQ

### Is Claude Haiku 5.5 better than Mistral Small 3?

Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 31.2 on the Noometry Index. Mistral Small 3 costs 3.5× less per token, which makes it the better buy when Claude Haiku 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Haiku 5.5 or Mistral Small 3?

Mistral Small 3 is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; Claude Haiku 5.5 lists at $0.10 and $0.50.

### Is Claude Haiku 5.5 or Mistral Small 3 better for coding?

Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 36.5 in the Noometry coding category.

### Which has the bigger context window?

Claude Haiku 5.5 does, with 1M tokens against 33K.

### How many benchmarks do Claude Haiku 5.5 and Mistral Small 3 share?

2 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Mistral Small 3 has 24.