# Claude 4 Opus vs Mistral Small 3.1

> Side-by-side benchmark comparison for Claude 4 Opus and Mistral Small 3.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-4-opus-vs-mistral-small-3-1
- Last updated: October 14, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude 4 Opus and Mistral Small 3.1 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Claude 4 Opus has the larger published context window at 200K.

## Model Snapshot

| Property | Claude 4 Opus | Mistral Small 3.1 |
|----------|----------|----------|
| Creator | Anthropic | Mistral |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 128K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 5 | 7 |
| Pricing (input/output) | N/A | N/A |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Claude 4 Opus public-lane score: Coming soon
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Claude 4 Opus | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 72.5% | Coming soon | Coming soon |
| HumanEval | Coming soon | 88.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude 4 Opus public-lane score: Coming soon
- Mistral Small 3.1 public-lane score: 18.8 (Unranked · 2 rankable rows)

| Benchmark | Claude 4 Opus | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 73.7% | 64.0% | Claude 4 Opus |
| MMMU-Pro | Coming soon | 49.3% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude 4 Opus public-lane score: Coming soon
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Claude 4 Opus | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 74.9% | 46.0% | Claude 4 Opus |
| MMMLU | 87.4% | Coming soon | Coming soon |
| MMLU | Coming soon | 80.6% | Coming soon |
| MMLU-Pro | Coming soon | 66.8% | Coming soon |
| SimpleQA | Coming soon | 10.4% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude 4 Opus public-lane score: Coming soon
- Mistral Small 3.1 public-lane score: Coming soon

| Benchmark | Claude 4 Opus | Mistral Small 3.1 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 33.9% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude 4 Opus and Mistral Small 3.1?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude 4 Opus vs Claude 4 Opus Thinking](/compare/claude-4-opus-vs-claude-4-opus-thinking)
- [Mistral Small 3.1 vs Claude 4 Opus Thinking](/compare/claude-4-opus-thinking-vs-mistral-small-3-1)
- [Claude 4 Opus vs Claude Opus 5.5](/compare/claude-4-opus-vs-claude-opus-5-5)
- [Mistral Small 3.1 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-mistral-small-3-1)

## Explore More

- [Claude 4 Opus profile](/models/claude-4-opus)
- [Mistral Small 3.1 profile](/models/mistral-small-3-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)