# Phi-3.5-mini vs Phi-4-reasoning-plus

> Side-by-side benchmark comparison for Phi-3.5-mini and Phi-4-reasoning-plus across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/phi-3-5-mini-vs-phi-4-reasoning-plus
- Last updated: October 14, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Phi-3.5-mini and Phi-4-reasoning-plus share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Phi-3.5-mini has the larger published context window at 128K.

## Model Snapshot

| Property | Phi-3.5-mini | Phi-4-reasoning-plus |
|----------|----------|----------|
| Creator | Microsoft | Microsoft |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 32K |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 8 | 6 |
| Pricing (input/output) | N/A | N/A |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 62.8% | Coming soon | Coming soon |
| LiveCodeBench | Coming soon | 53.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| BBH | 69% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 69% | Coming soon | Coming soon |
| MMLU-Pro | 47.4% | 76% | Phi-4-reasoning-plus |
| GPQA | 30.4% | 68.9% | Phi-4-reasoning-plus |
| MMMLU | 55.4% | Coming soon | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 47.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 84.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Phi-3.5-mini public-lane score: Coming soon
- Phi-4-reasoning-plus public-lane score: Coming soon

| Benchmark | Phi-3.5-mini | Phi-4-reasoning-plus | Winner |
|-----------|-----------|-----------|--------|
| GSM8K | 86.2% | Coming soon | Coming soon |
| AIME 2024 | Coming soon | 81.3% | Coming soon |
| AIME 2025 | Coming soon | 78% | Coming soon |

## FAQ

### Is there enough evidence to pick between Phi-3.5-mini and Phi-4-reasoning-plus?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Phi-3.5-mini vs Phi-4-reasoning](/compare/phi-3-5-mini-vs-phi-4-reasoning)
- [Phi-4-reasoning-plus vs Phi-4-reasoning](/compare/phi-4-reasoning-vs-phi-4-reasoning-plus)
- [Phi-3.5-mini vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-phi-3-5-mini)
- [Phi-4-reasoning-plus vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-phi-4-reasoning-plus)

## Explore More

- [Phi-3.5-mini profile](/models/phi-3-5-mini)
- [Phi-4-reasoning-plus profile](/models/phi-4-reasoning-plus)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)