# Llama 3.1-405B vs o1-mini

> o1-mini is the stronger model overall, scoring 33.7 to 30.4 on the Noometry Index.

- Canonical page: https://noometry.com/compare/llama-3-1-405b-vs-o1-mini
- Last updated: 2026-10-10
- Shared benchmarks: 25

## Summary

- They share 25 benchmarks with published results for both. Llama 3.1-405B scores higher in 1 category and o1-mini in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where o1-mini leads 33.7 to 17.3.
- The biggest single-benchmark swing is MATH Level 5: 49.8% for Llama 3.1-405B and 89.2% for o1-mini.
- Llama 3.1-405B has downloadable open weights; the other is API-only.

## Snapshot

| | Llama 3.1-405B | o1-mini |
|---|---|---|
| Provider | Meta | OpenAI |
| Noometry Index | 30.4 | 33.7 |
| Rank | 279 | 230 |
| Context | — | — |
| Input $/M | — | — |
| Output $/M | — | — |
| Weights | Open | Proprietary |

## Coding

- Llama 3.1-405B: 32.7 (#257)
- o1-mini: 35.1 (#218)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| WeirdML | 21.4% | 36.3% |
| LMArena Coding | 1291 | 1362 |
| Aider Polyglot | — | 32.9% |
| LiveBench Coding | — | 48% |
| HumanEval+ | — | 89% |
| MBPP+ | — | 78.8% |

## Agentic & Tool Use

- Llama 3.1-405B: 20.9 (#131)
- o1-mini: 24.3 (#112)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| Cybench | 7.5% | 10% |
| TheAgentCompany | 7.4% | — |

## Reasoning

- Llama 3.1-405B: 16.4 (#293)
- o1-mini: 8.9 (#340)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| SimpleBench | 23% | 18.1% |
| LMArena Hard Prompts | 1270 | 1333 |
| Epoch Capabilities Index | 128.76 | 135.82 |
| ARC-AGI-2 | — | 0.8% |
| Kagi LLM Benchmark | 45% | — |
| ARC-AGI-1 | — | 14% |
| LiveBench Reasoning | — | 72.3% |
| DTBench | 61.4% | — |
| LiveBench Data Analysis | — | 57.9% |
| BIG-Bench Hard | 82.9% | — |
| ForecastBench | 59.9 | — |
| HellaSwag | 89.2% | — |
| LiveBench | — | 57.8% |
| PIQA | 85.9% | — |
| WinoGrande | 89.2% | — |

## Math

- Llama 3.1-405B: 17.3 (#283)
- o1-mini: 33.7 (#168)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 9.7% | 46.9% |
| LMArena Math | 1281 | 1358 |
| MATH Level 5 | 49.8% | 89.2% |
| Omni-MATH | 24.9% | — |
| LiveBench Math | — | 62% |
| FrontierMath (Feb 2025 set) | — | 1.7% |

## Knowledge

- Llama 3.1-405B: 30.4 (#221)
- o1-mini: 34.8 (#180)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| GPQA Diamond | 50.9% | 62.4% |
| Confabulations | 17.6% | 18.6% |
| LMArena Expert | 1243 | 1316 |
| MMLU-Pro | 72.3% | — |
| GPQA (HELM) | 52.2% | — |
| ARC (AI2) Challenge | 95.3% | — |
| MMLU | 84.5% | — |
| TriviaQA | 82.7% | — |

## Multilingual

- Llama 3.1-405B: 40.9 (#209)
- o1-mini: 43.8 (#177)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| LMArena Non-English | 1248 | 1289 |
| LMArena Chinese | 1242 | 1314 |
| LMArena French | 1278 | 1292 |
| LMArena German | 1252 | 1278 |
| LMArena Japanese | 1208 | 1245 |
| LMArena Korean | 1184 | 1223 |
| LMArena Russian | 1265 | 1283 |
| LMArena Spanish | 1259 | 1302 |

## Instruction Following

- Llama 3.1-405B: 66.1 (#209)
- o1-mini: 67.0 (#200)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| LMArena Instruction Following | 1259 | 1304 |
| LiveBench Instruction Following | — | 65.4% |
| IFEval | 81.1% | — |

## Long Context

- Llama 3.1-405B: 38.4 (#192)
- o1-mini: 40.1 (#156)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| LMArena Longer Query | 1266 | 1321 |

## Writing & Preference

- Llama 3.1-405B: 39.1 (#246)
- o1-mini: 48.6 (#196)

| Benchmark | Llama 3.1-405B | o1-mini |
|---|---|---|
| LMArena Text | 1284 | 1317 |
| LMArena Creative Writing | 1262 | 1244 |
| LMArena Multi-Turn | 1297 | 1314 |
| Short-Story Creative Writing | — | 64.9% |
| EQ-Bench Creative Writing | 870 | — |
| WildBench | 78.3% | — |
| LiveBench Language | — | 40.9% |

## FAQ

### Is Llama 3.1-405B better than o1-mini?

o1-mini is the stronger model overall, scoring 33.7 to 30.4 on the Noometry Index.

### Is Llama 3.1-405B or o1-mini better for coding?

o1-mini scores higher on coding benchmarks: 35.1 versus 32.7 in the Noometry coding category.

### How many benchmarks do Llama 3.1-405B and o1-mini share?

25 benchmarks have published results for both models. Llama 3.1-405B has 42 scored results on Noometry and o1-mini has 39.