Model comparison
Claude Sonnet 5.5 vs Mistral Nemo
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 26.4 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.
Last verified . 2 shared benchmarks.
Mistral AISummary
- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 scores higher in 5 categories and Mistral Nemo in 0 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Sonnet 5.5 leads 87.9 to 25.5.
- 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.
Side by side
| Claude Sonnet 5.5 | Mistral Nemo | |
|---|---|---|
| Provider | Anthropic | Mistral AI |
| Noometry Index | 61.9 | 26.4 |
| Released | 2026-09-28 | 2024-07-01 |
| Weights | Proprietary | Open |
| Context window | 1M | 128K |
| Max output | 128K | 128K |
| Input $ / M tokens | $2 | $0.15 |
| Output $ / M tokens | $10 | $0.15 |
| Results tracked | 32 | 10 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Not comparable
Claude Sonnet 5.5: 67.3 (#6), Mistral Nemo: —
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| LMArena WebDev | 1774 | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| LMArena Coding | 1513 | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 45.0 (#16), Mistral Nemo: 23.5 (#125)
| 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 leads
Claude Sonnet 5.5: 54.0 (#28), Mistral Nemo: 20.7 (#232)
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| Epoch Capabilities Index | 165.03 | 118.68 |
| NYT Connections (extended) | 80.5% | — |
| CritPt | 31.4% | — |
| LMArena Hard Prompts | 1495 | — |
| Mystery Game Puzzles | 65% | — |
| DTBench | — | 48.6% |
| PIQA | — | 83.5% |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 87.9 (#6), Mistral Nemo: 25.5 (#268)
| 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% | — |
| LMArena Math | 1510 | — |
| MATH Level 5 | — | 10.8% |
| FrontierMath Erdős | 2.9% | — |
| GSM8K | — | 84.2% |
Knowledge Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#12), Mistral Nemo: 12.3 (#298)
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| GPQA Diamond | 95.6% | 29.9% |
| SimpleQA Verified | 46.5% | — |
| LMArena Expert | 1540 | — |
| BoolQ | — | 82.5% |
Multimodal Not comparable
Claude Sonnet 5.5: 51.5 (#6), Mistral Nemo: —
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| LMArena Vision | 1289 | — |
| Furniture Assembly | 75% | — |
Multilingual Not comparable
Claude Sonnet 5.5: 55.3 (#30), Mistral Nemo: —
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| LMArena Non-English | 1452 | — |
| LMArena Chinese | 1522 | — |
| LMArena Russian | 1451 | — |
Instruction Following Not comparable
Claude Sonnet 5.5: 78.3 (#11), Mistral Nemo: —
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| LMArena Instruction Following | 1495 | — |
Long Context Not comparable
Claude Sonnet 5.5: 45.9 (#28), Mistral Nemo: —
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| LMArena Longer Query | 1498 | — |
Writing & Preference Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 66.0 (#40), Mistral Nemo: 28.5 (#296)
| Benchmark | Claude Sonnet 5.5 | Mistral Nemo |
|---|---|---|
| LMArena Text | 1471 | — |
| LMArena Creative Writing | 1465 | — |
| EQ-Bench Creative Writing | — | 881 |
| LMArena Multi-Turn | 1474 | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Mistral Nemo?
Claude Sonnet 5.5 is the stronger model overall, scoring 61.9 to 26.4 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?
2 benchmarks have published results for both models. Claude Sonnet 5.5 has 32 scored results on Noometry and Mistral Nemo has 10.