# Claude Sonnet 5.5 vs Mistral Nemo

> Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 25.9 on the Noometry Index. Mistral Nemo costs 27× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/claude-sonnet-5-5-vs-mistral-nemo
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. Claude Sonnet 5.5 scores higher in 4 categories and Mistral Nemo in 0 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 88.7 to 23.5.
- The biggest single-benchmark swing is GPQA Diamond: 95.6% for Claude Sonnet 5.5 and 29.9% for Mistral Nemo.
- Mistral Nemo is cheaper at $0.15 / $0.15 per million input/output tokens, against $2 / $10 for Claude Sonnet 5.5.
- Claude Sonnet 5.5 accepts more context: 1M tokens versus 128K.
- Mistral Nemo has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 60.5 | 25.9 |
| Rank | 10 | 332 |
| Context | 1M | 128K |
| Input $/M | $2 | $0.15 |
| Output $/M | $10 | $0.15 |
| Weights | Proprietary | Open |

## Coding

- Claude Sonnet 5.5: 65.5 (#6)
- Mistral Nemo: —

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1699 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |

## Agentic & Tool Use

- Claude Sonnet 5.5: 44.9 (#14)
- Mistral Nemo: 23.3 (#118)

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| APEX-Agents | 75.5% | — |
| Berkeley Function Calling Leaderboard | — | 27.6% |
| BALROG | — | 17.6% |

## Reasoning

- Claude Sonnet 5.5: 52.4 (#29)
- Mistral Nemo: 19.9 (#230)

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 48.6% |
| Epoch Capabilities Index | — | 118.63 |
| PIQA | — | 83.5% |

## Math

- Claude Sonnet 5.5: 88.7 (#4)
- Mistral Nemo: 23.5 (#263)

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| ProofBench | 100% | — |
| MATH Level 5 | — | 10.8% |
| GSM8K | — | 84.2% |

## Knowledge

- Claude Sonnet 5.5: 66.0 (#11)
- Mistral Nemo: 12.3 (#293)

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| GPQA Diamond | 95.6% | 29.9% |
| SimpleQA Verified | 46.5% | — |
| BoolQ | — | 82.5% |

## Multimodal

- Claude Sonnet 5.5: 53.2 (#5)
- Mistral Nemo: —

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| Furniture Assembly | 75% | — |

## Writing & Preference

- Claude Sonnet 5.5: —
- Mistral Nemo: 28.6 (#291)

| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| EQ-Bench Creative Writing | — | 881 |

## FAQ

### Is Claude Sonnet 5.5 better than Mistral Nemo?

Claude Sonnet 5.5 is the stronger model overall, scoring 60.5 to 25.9 on the Noometry Index. Mistral Nemo costs 27× less per token, which makes it the better buy when Claude Sonnet 5.5's lead doesn't matter for your workload.

### Which is cheaper, Claude Sonnet 5.5 or Mistral Nemo?

Mistral Nemo is cheaper. It lists at $0.15 per million input tokens and $0.15 per million output tokens; Claude Sonnet 5.5 lists at $2 and $10.

### Which has the bigger context window?

Claude Sonnet 5.5 does, with 1M tokens against 128K.

### How many benchmarks do Claude Sonnet 5.5 and Mistral Nemo share?

1 benchmark has published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Mistral Nemo has 10.