# Llama 3.1 8B vs o3-pro

> Side-by-side benchmark comparison for Llama 3.1 8B and o3-pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/llama-3-1-8b-vs-o3-pro
- Last updated: October 14, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Llama 3.1 8B and o3-pro.

## Summary

- Llama 3.1 8B and o3-pro 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 | Llama 3.1 8B | o3-pro |
|----------|----------|----------|
| Creator | Meta | OpenAI |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 200K |
| Independent public score (not head-to-head) | null | 45.47 |
| Benchmarks Covered | 7 | 0 |
| Pricing (input/output) | N/A | $20.00 / $80.00 |

## Category Breakdown

### Coding

- Winner: Insufficient shared evidence
- Llama 3.1 8B public-lane score: Coming soon
- o3-pro public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | o3-pro | Winner |
|-----------|-----------|-----------|--------|
| HumanEval | 72.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Llama 3.1 8B public-lane score: Coming soon
- o3-pro public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | o3-pro | Winner |
|-----------|-----------|-----------|--------|
| MMLU | 73% | Coming soon | Coming soon |
| MMLU-Pro | 48.3% | Coming soon | Coming soon |
| GPQA | 30.4% | Coming soon | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Llama 3.1 8B public-lane score: Coming soon
- o3-pro public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | o3-pro | Winner |
|-----------|-----------|-----------|--------|
| MGSM | 68.9% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Llama 3.1 8B public-lane score: Coming soon
- o3-pro public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | o3-pro | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 80.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Llama 3.1 8B public-lane score: Coming soon
- o3-pro public-lane score: Coming soon

| Benchmark | Llama 3.1 8B | o3-pro | Winner |
|-----------|-----------|-----------|--------|
| GSM8K | 84.5% | Coming soon | Coming soon |

## FAQ

### Can I compare Llama 3.1 8B and o3-pro 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

- [Llama 3.1 8B vs o3](/compare/llama-3-1-8b-vs-o3)
- [o3-pro vs o3](/compare/o3-vs-o3-pro)
- [Llama 3.1 8B vs o3-mini](/compare/llama-3-1-8b-vs-o3-mini)
- [o3-pro vs o3-mini](/compare/o3-mini-vs-o3-pro)

## Explore More

- [Llama 3.1 8B profile](/models/llama-3-1-8b)
- [o3-pro profile](/models/o3-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)