# Claude Haiku 4.5 vs Devstral Small 2505

> Claude Haiku 4.5 is the stronger model overall, scoring 39.5 to 34.3 on the Noometry Index. Devstral Small 2505 costs 13× less per token, which makes it the better buy when Claude Haiku 4.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-haiku-4-5-vs-devstral-small
- Last updated: 2026-10-10
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. Claude Haiku 4.5 scores higher in 1 category and Devstral Small 2505 in 1 category; 2 gaps are clear of the uncertainty.
- The widest gap is in coding, where Claude Haiku 4.5 leads 44.0 to 38.9.
- The biggest single-benchmark swing is SciCode: 43.3% for Claude Haiku 4.5 and 28.8% for Devstral Small 2505.
- Devstral Small 2505 is cheaper at $0.10 / $0.30 per million input/output tokens, against $1 / $5 for Claude Haiku 4.5.
- Claude Haiku 4.5 accepts more context: 200K tokens versus 128K.
- Devstral Small 2505 has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 39.5 | 34.3 |
| Rank | 165 | 233 |
| Context | 200K | 128K |
| Input $/M | $1 | $0.10 |
| Output $/M | $5 | $0.30 |
| Weights | Proprietary | Open |

## Coding

- Claude Haiku 4.5: 44.0 (#78)
- Devstral Small 2505: 38.9 (#166)

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| SWE-bench Verified (bash only) | 66.6% | 56.4% |
| SciCode | 43.3% | 28.8% |
| LMArena WebDev | 1330 | — |
| SWE-bench Multilingual | 64.7% | — |
| WeirdML | 45.4% | — |
| LMArena Coding | 1453 | — |
| ALE-Bench | 653.48 | — |

## Agentic & Tool Use

- Claude Haiku 4.5: 33.6 (#52)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| Terminal-Bench | 35.5% | — |
| Berkeley Function Calling Leaderboard | 68.7% | — |
| DeepResearch Bench | 45.5% | — |
| BALROG | 31.2% | — |
| ExploitBench | 13.7% | — |
| Vending-Bench 2 | 458.89 | — |

## Reasoning

- Claude Haiku 4.5: 15.1 (#320)
- Devstral Small 2505: 19.7 (#252)

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| CritPt | 0% | 0% |
| ARC-AGI-2 | 4% | — |
| Kagi LLM Benchmark | — | 37.7% |
| NYT Connections (extended) | 14.3% | — |
| ARC-AGI-1 | 47.7% | — |
| Chess Puzzles | 8% | — |
| LMArena Hard Prompts | 1420 | — |
| DTBench | 73.6% | — |
| LMCA | 30.9% | — |
| Epoch Capabilities Index | 142.41 | — |
| ForecastBench | 61.4 | — |

## Math

- Claude Haiku 4.5: 44.9 (#78)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 66.7% | — |
| Omni-MATH | 56.1% | — |
| LMArena Math | 1396 | — |
| MATH Level 5 | 96.4% | — |
| FrontierMath (Feb 2025 set) | 5.9% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- Claude Haiku 4.5: 37.7 (#153)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| GPQA Diamond | 71.2% | — |
| SimpleQA Verified | 13.2% | — |
| MMLU-Pro | 77.7% | — |
| Vectara Hallucination Rate | 9.8% | — |
| GPQA (HELM) | 60.5% | — |
| LMArena Expert | 1442 | — |

## Multimodal

- Claude Haiku 4.5: 26.8 (#118)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| Blueprint-Bench 2 | 0% | — |
| LMArena Document | 1420 | — |

## Multilingual

- Claude Haiku 4.5: 49.9 (#129)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| LMArena Non-English | 1377 | — |
| LMArena Chinese | 1417 | — |
| LMArena French | 1408 | — |
| LMArena German | 1375 | — |
| LMArena Japanese | 1339 | — |
| LMArena Korean | 1347 | — |
| LMArena Russian | 1381 | — |
| LMArena Spanish | 1420 | — |

## Instruction Following

- Claude Haiku 4.5: 71.4 (#149)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| IFEval | 80.1% | — |
| LMArena Instruction Following | 1414 | — |

## Long Context

- Claude Haiku 4.5: 43.6 (#92)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| LMArena Longer Query | 1427 | — |

## Writing & Preference

- Claude Haiku 4.5: 57.9 (#123)
- Devstral Small 2505: —

| Benchmark | Claude Haiku 4.5 | Devstral Small 2505 |
|---|---|---|
| LMArena Text | 1396 | — |
| LMArena Creative Writing | 1372 | — |
| WildBench | 83.9% | — |
| EQ-Bench 4 | 1064 | — |
| LMArena Multi-Turn | 1409 | — |

## FAQ

### Is Claude Haiku 4.5 better than Devstral Small 2505?

Claude Haiku 4.5 is the stronger model overall, scoring 39.5 to 34.3 on the Noometry Index. Devstral Small 2505 costs 13× less per token, which makes it the better buy when Claude Haiku 4.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Haiku 4.5 or Devstral Small 2505?

Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Claude Haiku 4.5 lists at $1 and $5.

### Is Claude Haiku 4.5 or Devstral Small 2505 better for coding?

Claude Haiku 4.5 scores higher on coding benchmarks: 44.0 versus 38.9 in the Noometry coding category.

### Which has the bigger context window?

Claude Haiku 4.5 does, with 200K tokens against 128K.

### How many benchmarks do Claude Haiku 4.5 and Devstral Small 2505 share?

3 benchmarks have published results for both models. Claude Haiku 4.5 has 53 scored results on Noometry and Devstral Small 2505 has 4.