# GLM-5.1 vs Mistral Medium 3.5 128B

> Side-by-side benchmark comparison for GLM-5.1 and Mistral Medium 3.5 128B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-1-vs-mistral-medium-3-5-128b
- Last updated: September 10, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GLM-5.1 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

- GLM-5.1 leads overall 63.24 to 30.13.
- The clearest category separation is in agentic, where the averages are 54.3 for GLM-5.1 and 21.9 for Mistral Medium 3.5 128B.
- The biggest single benchmark swing is GPQA Diamond (Vals) in Knowledge, with scores of 84.5% and 34.8%.
- GLM-5.1 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Mistral Medium 3.5 128B also has the larger context window at 256K.

## Model Snapshot

| Property | GLM-5.1 | Mistral Medium 3.5 128B |
|----------|----------|----------|
| Creator | Z.AI | Mistral |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 203K | 256K |
| Overall Score | 63.24 | 30.13 |
| Benchmarks Covered | 26 | 7 |
| Pricing (input/output) | $1.40 / $4.40 | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- GLM-5.1 public-lane score: 54.3 (Estimated · #37/152)
- Mistral Medium 3.5 128B public-lane score: 21.9 (Supported · #150/152)

| Benchmark | GLM-5.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 63.5% | Coming soon | Coming soon |
| BrowseComp | 68% | Coming soon | Coming soon |
| τ³-bench results | 70.6% | 91.4% | Mistral Medium 3.5 128B |
| MCP Atlas | 71.8% | Coming soon | Coming soon |
| CyberGym | 68.7% | Coming soon | Coming soon |
| Claw-Eval | 62.3% | Coming soon | Coming soon |
| Gert Labs | 60.11% | 39.10% | GLM-5.1 |
| ResearchClawBench | 18.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 56.9% | 39.0% | GLM-5.1 |

### Coding

- Winner: Coming soon
- GLM-5.1 public-lane score: 56.4 (Supported · #38/151)
- Mistral Medium 3.5 128B public-lane score: 36.9 (Estimated · #127/151)

| Benchmark | GLM-5.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 58.4% | Coming soon | Coming soon |
| NL2Repo | 42.7% | Coming soon | Coming soon |
| SWE-Rebench | 62.7% | Coming soon | Coming soon |
| Vibe Code Bench | 31.46% | Coming soon | Coming soon |
| OpenHarmony Bench | 52.3% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 81.4% | Coming soon | Coming soon |
| SWE-bench (Vals) | 76.4% | 66.4% | GLM-5.1 |
| SWE-bench Verified | Coming soon | 77.6% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- GLM-5.1 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 55.6 (Unranked · 1 rankable row)

### Reasoning

- Winner: Coming soon
- GLM-5.1 public-lane score: 71.7 (Unranked · 2 rankable rows)
- Mistral Medium 3.5 128B public-lane score: 68.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: GLM-5.1
- GLM-5.1 public-lane score: 54.8 (Supported · #54/183)
- Mistral Medium 3.5 128B public-lane score: 39 (Supported · #140/183)

| Benchmark | GLM-5.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 86.2% | Coming soon | Coming soon |
| HLE | 52.3% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 84.5% | 34.8% | GLM-5.1 |
| MMLU-Pro (Vals) | 86.9% | 75.3% | GLM-5.1 |

### Instruction Following

- Winner: Coming soon
- GLM-5.1 public-lane score: 93.7 (#5/123)
- Mistral Medium 3.5 128B public-lane score: 84 (#48/123)

### Mathematics

- Winner: Coming soon
- GLM-5.1 public-lane score: 64.1 (#3/7)
- Mistral Medium 3.5 128B public-lane score: Coming soon

| Benchmark | GLM-5.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.3% | Coming soon | Coming soon |
| HMMT Nov 2025 | 94.0% | Coming soon | Coming soon |
| HMMT Feb 2026 | 82.6% | Coming soon | Coming soon |
| MMAnswerBench | 83.8% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 33.448% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 12.500% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GLM-5.1 or Mistral Medium 3.5 128B?

GLM-5.1 is ahead overall on BenchLM right now.

### Where is the biggest gap between GLM-5.1 and Mistral Medium 3.5 128B?

The widest category gap is in agentic, where the averages are 54.3 for GLM-5.1 and 21.9 for Mistral Medium 3.5 128B.

### How many benchmarks does GLM-5.1 cover on BenchLM?

GLM-5.1 currently has 26 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

- [GLM-5.1 vs GLM-5.3](/compare/glm-5-1-vs-glm-5-3)
- [Mistral Medium 3.5 128B vs GLM-5.3](/compare/glm-5-3-vs-mistral-medium-3-5-128b)
- [GLM-5.1 vs GLM-5.2](/compare/glm-5-1-vs-glm-5-2)
- [Mistral Medium 3.5 128B vs GLM-5.2](/compare/glm-5-2-vs-mistral-medium-3-5-128b)

## Explore More

- [GLM-5.1 profile](/models/glm-5-1)
- [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)