# Claude Opus 4.7 vs Mistral Medium 3.5 128B

> Side-by-side benchmark comparison for Claude Opus 4.7 and Mistral Medium 3.5 128B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-opus-4-7-vs-mistral-medium-3-5-128b
- Last updated: September 10, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Opus 4.7 if you want the stronger benchmark profile. Mistral Medium 3.5 128B only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Opus 4.7 leads overall 70.29 to 30.13.
- The clearest category separation is in agentic, where the averages are 55.8 for Claude Opus 4.7 and 21.9 for Mistral Medium 3.5 128B.
- The biggest single benchmark swing is GPQA Diamond (Vals) in Knowledge, with scores of 90.2% and 34.8%.
- Mistral Medium 3.5 128B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Opus 4.7 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Opus 4.7 | Mistral Medium 3.5 128B |
|----------|----------|----------|
| Creator | Anthropic | Mistral |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 256K |
| Overall Score | 70.29 | 30.13 |
| Benchmarks Covered | 13 | 7 |
| Pricing (input/output) | $5.00 / $25.00 | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Claude Opus 4.7
- Claude Opus 4.7 public-lane score: 55.8 (Supported · #36/152)
- Mistral Medium 3.5 128B public-lane score: 21.9 (Supported · #150/152)

| Benchmark | Claude Opus 4.7 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 65.59% | 39.10% | Claude Opus 4.7 |
| ResearchClawBench | 20.7% | Coming soon | Coming soon |
| OSWorld 2.0 | 13.9% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 68.5% | 39.0% | Claude Opus 4.7 |
| τ³-bench results | Coming soon | 91.4% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: 62.7 (Supported · #14/151)
- Mistral Medium 3.5 128B public-lane score: 36.9 (Estimated · #127/151)

| Benchmark | Claude Opus 4.7 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 71.00% | Coming soon | Coming soon |
| React Native Evals | 82.8% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 38.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 82.0% | 66.4% | Claude Opus 4.7 |
| SWE-bench Verified | Coming soon | 77.6% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 55.6 (Unranked · 1 rankable row)

### Reasoning

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 68.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: 64.6 (Estimated · #26/183)
- Mistral Medium 3.5 128B public-lane score: 39 (Supported · #140/183)

| Benchmark | Claude Opus 4.7 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 90.2% | 34.8% | Claude Opus 4.7 |
| MMLU-Pro (Vals) | 89.9% | 75.3% | Claude Opus 4.7 |

### Instruction Following

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 84 (#48/123)

### Mathematics

- Winner: Coming soon
- Claude Opus 4.7 public-lane score: 60.8 (Unranked · 2 rankable rows)
- Mistral Medium 3.5 128B public-lane score: Coming soon

| Benchmark | Claude Opus 4.7 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 43.793% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 22.917% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Claude Opus 4.7 or Mistral Medium 3.5 128B?

Claude Opus 4.7 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Opus 4.7 and Mistral Medium 3.5 128B?

The widest category gap is in agentic, where the averages are 55.8 for Claude Opus 4.7 and 21.9 for Mistral Medium 3.5 128B.

### How many benchmarks does Claude Opus 4.7 cover on BenchLM?

Claude Opus 4.7 currently has 13 sourced benchmark scores on BenchLM.

### How many benchmarks does Mistral Medium 3.5 128B cover on BenchLM?

Mistral Medium 3.5 128B currently has 7 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Opus 4.7 vs Claude Opus 4.7 (Adaptive)](/compare/claude-opus-4-7-vs-claude-opus-4-7-adaptive)
- [Mistral Medium 3.5 128B vs Claude Opus 4.7 (Adaptive)](/compare/claude-opus-4-7-adaptive-vs-mistral-medium-3-5-128b)
- [Claude Opus 4.7 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-claude-opus-4-7)
- [Mistral Medium 3.5 128B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-mistral-medium-3-5-128b)

## Explore More

- [Claude Opus 4.7 profile](/models/claude-opus-4-7)
- [Mistral Medium 3.5 128B profile](/models/mistral-medium-3-5-128b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)