# Mistral Small 3.1 vs Phi-3.5-mini

> Side-by-side benchmark comparison for Mistral Small 3.1 and Phi-3.5-mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mistral-small-3-1-vs-phi-3-5-mini
- Last updated: October 14, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Pick Phi-3.5-mini if you want the stronger benchmark profile. Mistral Small 3.1 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Phi-3.5-mini leads overall 51 to 46.
- The biggest single benchmark swing is HumanEval in Coding, with scores of 88.4% and 62.8%.

## Model Snapshot

| Property | Mistral Small 3.1 | Phi-3.5-mini |
|----------|----------|----------|
| Creator | Mistral | Microsoft |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 128K | 128K |
| Overall Score | null | null |
| Benchmarks Covered | 7 | 8 |
| Pricing (input/output) | N/A | N/A |

## Category Breakdown

### Coding

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: Coming soon
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 88.4% | 62.8% | Mistral Small 3.1 |

### Reasoning

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: Coming soon
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| BBH | Coming soon | 69% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: 18.8 (Unranked · 2 rankable rows)
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| MMMU | 64.0% | Coming soon | Coming soon |
| MMMU-Pro | 49.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: Coming soon
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 80.6% | 69% | Mistral Small 3.1 |
| MMLU-Pro | 66.8% | 47.4% | Mistral Small 3.1 |
| GPQA | 46.0% | 30.4% | Mistral Small 3.1 |
| SimpleQA | 10.4% | Coming soon | Coming soon |
| MMMLU | Coming soon | 55.4% | Coming soon |

### Multilingual

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: Coming soon
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| MGSM | Coming soon | 47.9% | Coming soon |

### Mathematics

- Winner: Not comparable
- Mistral Small 3.1 public-lane score: Coming soon
- Phi-3.5-mini public-lane score: Coming soon

| Benchmark | Mistral Small 3.1 | Phi-3.5-mini | Winner |
|-----------|-----------|-----------|--------|
| GSM8K | Coming soon | 86.2% | Coming soon |

## FAQ

### Which is better overall, Mistral Small 3.1 or Phi-3.5-mini?

Phi-3.5-mini is ahead overall on BenchLM right now.

### How many benchmarks does Mistral Small 3.1 cover on BenchLM?

Mistral Small 3.1 currently has 7 sourced benchmark scores on BenchLM.

### How many benchmarks does Phi-3.5-mini cover on BenchLM?

Phi-3.5-mini currently has 8 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Mistral Small 3.1 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-mistral-small-3-1)
- [Phi-3.5-mini vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-phi-3-5-mini)
- [Mistral Small 3.1 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-mistral-small-3-1)
- [Phi-3.5-mini vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-phi-3-5-mini)

## Explore More

- [Mistral Small 3.1 profile](/models/mistral-small-3-1)
- [Phi-3.5-mini profile](/models/phi-3-5-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)