# Llama 3.1 8B vs Phi-4

> Side-by-side benchmark comparison for Llama 3.1 8B and Phi-4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/llama-3-1-8b-vs-phi-4
- Last updated: October 14, 2026

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

## Quick Verdict

Pick Llama 3.1 8B if you want the stronger benchmark profile. Phi-4 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Llama 3.1 8B leads overall 51 to 25.13.
- The biggest single benchmark swing is GPQA in Knowledge, with scores of 30.4% and 56.1%.
- Llama 3.1 8B also has the larger context window at 128K.

## Model Snapshot

| Property | Llama 3.1 8B | Phi-4 |
|----------|----------|----------|
| Creator | Meta | Microsoft |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 128K | 16K |
| Overall Score | null | 25.13 |
| Benchmarks Covered | 7 | 5 |
| Pricing (input/output) | N/A | $0.00 / $0.00 |

## Category Breakdown

### Coding

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | Phi-4 | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 72.6% | 82.6% | Phi-4 |

### Reasoning

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: 25.9 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: 23.4 (Supported · #173/181)

| Benchmark | Llama 3.1 8B | Phi-4 | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 73% | 84.8% | Phi-4 |
| MMLU-Pro | 48.3% | Coming soon | Coming soon |
| GPQA | 30.4% | 56.1% | Phi-4 |

### Multilingual

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: 1 (#17/17)

| Benchmark | Llama 3.1 8B | Phi-4 | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 68.9% | 80.6% | Phi-4 |
| MMLU-ProX | Coming soon | 49.9% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: 28.8 (#118/128)

| Benchmark | Llama 3.1 8B | Phi-4 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 80.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Llama 3.1 8B public-lane score: Coming soon
- Phi-4 public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | Phi-4 | Winner |
|-----------|-----------|-----------|--------|
| GSM8K | 84.5% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Llama 3.1 8B or Phi-4?

Llama 3.1 8B is ahead overall on BenchLM right now.

### How many benchmarks does Llama 3.1 8B cover on BenchLM?

Llama 3.1 8B currently has 7 sourced benchmark scores on BenchLM.

### How many benchmarks does Phi-4 cover on BenchLM?

Phi-4 currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Llama 3.1 8B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-llama-3-1-8b)
- [Phi-4 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-phi-4)
- [Llama 3.1 8B vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-llama-3-1-8b)
- [Phi-4 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-phi-4)

## Explore More

- [Llama 3.1 8B profile](/models/llama-3-1-8b)
- [Phi-4 profile](/models/phi-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)