# Llama 3.1-8B vs MiMo-V2.5-Pro

> MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 22.8 on the Noometry Index. Llama 3.1-8B costs 9.5× less per token, which makes it the better buy when MiMo-V2.5-Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/llama-3-1-8b-vs-mimo-v2-5-pro
- Last updated: 2026-10-10
- Shared benchmarks: 22

## Summary

- They share 22 benchmarks with published results for both. Llama 3.1-8B scores higher in 0 categories and MiMo-V2.5-Pro in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where MiMo-V2.5-Pro leads 65.5 to 29.9.
- The biggest single-benchmark swing is SciCode: 13.2% for Llama 3.1-8B and 50.2% for MiMo-V2.5-Pro.
- Llama 3.1-8B is cheaper at $0.05 / $0.08 per million input/output tokens, against $0.43 / $0.87 for MiMo-V2.5-Pro.
- MiMo-V2.5-Pro accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| Provider | Meta | Xiaomi |
| Noometry Index | 22.8 | 44.8 |
| Rank | 347 | 70 |
| Context | 128K | 1.05M |
| Input $/M | $0.05 | $0.43 |
| Output $/M | $0.08 | $0.87 |
| Weights | Open | Open |

## Coding

- Llama 3.1-8B: 19.9 (#335)
- MiMo-V2.5-Pro: 47.0 (#58)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| SciCode | 13.2% | 50.2% |
| LMArena Coding | 1195 | 1502 |
| LMArena WebDev | — | 1477 |
| WeirdML | 1.7% | — |
| BigCodeBench Instruct | 32.8% | — |
| BigCodeBench Complete | 40.5% | — |
| ALE-Bench | — | 899.8 |
| HumanEval+ | 62.8% | — |
| MBPP+ | 55.6% | — |

## Agentic & Tool Use

- Llama 3.1-8B: 22.3 (#123)
- MiMo-V2.5-Pro: —

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| Berkeley Function Calling Leaderboard | 25.8% | — |
| BALROG | 15.1% | — |

## Reasoning

- Llama 3.1-8B: 14.5 (#316)
- MiMo-V2.5-Pro: 25.9 (#124)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| CritPt | 0% | 4% |
| LMArena Hard Prompts | 1175 | 1487 |
| DTBench | 50.9% | 84.5% |
| LMCA | 5.4% | 29.5% |
| NYT Connections (extended) | — | 34.4% |
| Chess Puzzles | 0% | — |
| Epoch Capabilities Index | 116.48 | — |
| PIQA | 81.2% | — |

## Math

- Llama 3.1-8B: 9.5 (#311)
- MiMo-V2.5-Pro: 38.6 (#84)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Math | 1179 | 1480 |
| OTIS Mock AIME 2024-2025 | 1.7% | — |
| ProofBench | — | 22% |
| Omni-MATH | 13.7% | — |
| MATH Level 5 | 22.9% | — |
| GSM8K | 82.4% | — |

## Knowledge

- Llama 3.1-8B: 8.0 (#302)
- MiMo-V2.5-Pro: 41.5 (#100)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Expert | 1144 | 1501 |
| GPQA Diamond | 27% | — |
| MMLU-Pro | 40.6% | — |
| GPQA (HELM) | 24.7% | — |
| BoolQ | 82.8% | — |
| MMLU | 56.1% | — |

## Multilingual

- Llama 3.1-8B: 34.2 (#244)
- MiMo-V2.5-Pro: 55.3 (#33)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Non-English | 1148 | 1449 |
| LMArena Chinese | 1151 | 1507 |
| LMArena French | 1176 | 1489 |
| LMArena German | 1144 | 1455 |
| LMArena Japanese | 1061 | 1418 |
| LMArena Korean | 1053 | 1436 |
| LMArena Russian | 1158 | 1450 |
| LMArena Spanish | 1169 | 1470 |

## Instruction Following

- Llama 3.1-8B: 59.1 (#253)
- MiMo-V2.5-Pro: 77.6 (#21)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Instruction Following | 1159 | 1477 |
| IFEval | 74.3% | — |

## Long Context

- Llama 3.1-8B: 35.8 (#233)
- MiMo-V2.5-Pro: 45.4 (#38)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Longer Query | 1182 | 1482 |

## Writing & Preference

- Llama 3.1-8B: 29.9 (#285)
- MiMo-V2.5-Pro: 65.5 (#47)

| Benchmark | Llama 3.1-8B | MiMo-V2.5-Pro |
|---|---|---|
| LMArena Text | 1187 | 1465 |
| LMArena Creative Writing | 1154 | 1440 |
| EQ-Bench Creative Writing | 713 | 1493 |
| LMArena Multi-Turn | 1172 | 1477 |
| WildBench | 68.7% | — |
| EQ-Bench 4 | — | 1208 |

## FAQ

### Is Llama 3.1-8B better than MiMo-V2.5-Pro?

MiMo-V2.5-Pro is the stronger model overall, scoring 44.8 to 22.8 on the Noometry Index. Llama 3.1-8B costs 9.5× less per token, which makes it the better buy when MiMo-V2.5-Pro's lead doesn't matter for your workload.

### Which is cheaper, Llama 3.1-8B or MiMo-V2.5-Pro?

Llama 3.1-8B is cheaper. It lists at $0.05 per million input tokens and $0.08 per million output tokens; MiMo-V2.5-Pro lists at $0.43 and $0.87.

### Is Llama 3.1-8B or MiMo-V2.5-Pro better for coding?

MiMo-V2.5-Pro scores higher on coding benchmarks: 47.0 versus 19.9 in the Noometry coding category.

### Which has the bigger context window?

MiMo-V2.5-Pro does, with 1.05M tokens against 128K.

### How many benchmarks do Llama 3.1-8B and MiMo-V2.5-Pro share?

22 benchmarks have published results for both models. Llama 3.1-8B has 43 scored results on Noometry and MiMo-V2.5-Pro has 27.