# Laguna XS.2 vs Mistral Medium 3.5 128B

> Side-by-side benchmark comparison for Laguna XS.2 and Mistral Medium 3.5 128B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/laguna-xs-2-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 Mistral Medium 3.5 128B if you want the stronger benchmark profile. Laguna XS.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Mistral Medium 3.5 128B leads overall 30.13 to 1.53.
- The clearest category separation is in knowledge, where the averages are 17.7 for Laguna XS.2 and 39 for Mistral Medium 3.5 128B.
- The biggest single benchmark swing is GPQA Diamond (Vals) in Knowledge, with scores of 55.1% and 34.8%.
- Laguna XS.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Laguna XS.2 | Mistral Medium 3.5 128B |
|----------|----------|----------|
| Creator | Poolside | Mistral |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 256K | 256K |
| Overall Score | 1.53 | 30.13 |
| Benchmarks Covered | 10 | 7 |
| Pricing (input/output) | $0.00 / $0.00 | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Laguna XS.2 public-lane score: 22.4 (Estimated · #149/152)
- Mistral Medium 3.5 128B public-lane score: 21.9 (Supported · #150/152)

| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 35.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 25.8% | 39.0% | Mistral Medium 3.5 128B |
| τ³-bench results | Coming soon | 91.4% | Coming soon |
| Gert Labs | Coming soon | 39.10% | Coming soon |

### Coding

- Winner: Coming soon
- Laguna XS.2 public-lane score: 24.7 (Supported · #148/151)
- Mistral Medium 3.5 128B public-lane score: 36.9 (Estimated · #127/151)

| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 69.9% | 77.6% | Mistral Medium 3.5 128B |
| SWE Multilingual | 57.7% | Coming soon | Coming soon |
| SWE-bench Pro | 46.3% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | 35.7% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 67.8% | Coming soon | Coming soon |
| SWE-bench (Vals) | 55.2% | 66.4% | Mistral Medium 3.5 128B |

### Multimodal & Grounded

- Winner: Coming soon
- Laguna XS.2 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 55.6 (Unranked · 1 rankable row)

### Reasoning

- Winner: Coming soon
- Laguna XS.2 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 68.6 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Coming soon
- Laguna XS.2 public-lane score: 17.7 (Estimated · #183/183)
- Mistral Medium 3.5 128B public-lane score: 39 (Supported · #140/183)

| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 55.1% | 34.8% | Laguna XS.2 |
| MMLU-Pro (Vals) | 69.1% | 75.3% | Mistral Medium 3.5 128B |

### Instruction Following

- Winner: Coming soon
- Laguna XS.2 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 84 (#48/123)

## FAQ

### Which is better overall, Laguna XS.2 or Mistral Medium 3.5 128B?

Mistral Medium 3.5 128B is ahead overall on BenchLM right now.

### Where is the biggest gap between Laguna XS.2 and Mistral Medium 3.5 128B?

The widest category gap is in knowledge, where the averages are 17.7 for Laguna XS.2 and 39 for Mistral Medium 3.5 128B.

### How many benchmarks does Laguna XS.2 cover on BenchLM?

Laguna XS.2 currently has 10 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

- [Laguna XS.2 vs Laguna M.1](/compare/laguna-m-1-vs-laguna-xs-2)
- [Mistral Medium 3.5 128B vs Laguna M.1](/compare/laguna-m-1-vs-mistral-medium-3-5-128b)
- [Laguna XS.2 vs Laguna S 2.1](/compare/laguna-s-2-1-vs-laguna-xs-2)
- [Mistral Medium 3.5 128B vs Laguna S 2.1](/compare/laguna-s-2-1-vs-mistral-medium-3-5-128b)

## Explore More

- [Laguna XS.2 profile](/models/laguna-xs-2)
- [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)