# Laguna S 2.1 vs Mistral Medium 3.5 128B

> Side-by-side benchmark comparison for Laguna S 2.1 and Mistral Medium 3.5 128B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/laguna-s-2-1-vs-mistral-medium-3-5-128b
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Laguna S 2.1 and Mistral Medium 3.5 128B.

## Summary

- Laguna S 2.1 and Mistral Medium 3.5 128B do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Laguna S 2.1 | Mistral Medium 3.5 128B |
|----------|----------|----------|
| Creator | Poolside | Mistral |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Independent public score (not head-to-head) | null | 48.95 |
| Benchmarks Covered | 6 | 7 |
| Pricing (input/output) | $0.10 / $0.20 | $1.50 / $7.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: 48.2 (Estimated · #77/151)
- Mistral Medium 3.5 128B public-lane score: 27.5 (Supported · #141/151)

| Benchmark | Laguna S 2.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 70.2% | Coming soon | Coming soon |
| Toolathlon-Verified | 49.7% | Coming soon | Coming soon |
| τ³-bench results | Coming soon | 91.4% | Coming soon |
| Gert Labs | Coming soon | 39.10% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 39.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: 47.8 (Estimated · #87/183)
- Mistral Medium 3.5 128B public-lane score: 41.1 (Estimated · #136/183)

| Benchmark | Laguna S 2.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 70.2% | Coming soon | Coming soon |
| SWE Multilingual | 78.5% | Coming soon | Coming soon |
| SWE-bench Pro | 59.4% | Coming soon | Coming soon |
| deepSwe | 40.4% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 77.6% | Coming soon |
| SWE-bench (Vals) | Coming soon | 66.4% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 55.4 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 68 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 42 (Supported · #131/181)

| Benchmark | Laguna S 2.1 | Mistral Medium 3.5 128B | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 34.8% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 75.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Laguna S 2.1 public-lane score: Coming soon
- Mistral Medium 3.5 128B public-lane score: 83.7 (#47/120)

## FAQ

### Can I compare Laguna S 2.1 and Mistral Medium 3.5 128B on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

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

## Explore More

- [Laguna S 2.1 profile](/models/laguna-s-2-1)
- [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)