Model comparison
Llama 3.1-405B vs o4-mini
o4-mini is the stronger model overall, scoring 41.6 to 30.7 on the Noometry Index.
Last verified . 32 shared benchmarks.
MetaSummary
- They share 32 benchmarks with published results for both. Llama 3.1-405B scores higher in 0 categories and o4-mini in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where o4-mini leads 40.8 to 18.4.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 9.7% for Llama 3.1-405B and 81.7% for o4-mini.
- Llama 3.1-405B has downloadable open weights; the other is API-only.
Side by side
| Llama 3.1-405B | o4-mini | |
|---|---|---|
| Provider | Meta | OpenAI |
| Noometry Index | 30.7 | 41.6 |
| Released | 2024-07-23 | 2025-04-16 |
| Weights | Open | Proprietary |
| Context window | — | 200K |
| Max output | — | 100K |
| Input $ / M tokens | — | $1.10 |
| Output $ / M tokens | — | $4.40 |
| Results tracked | 42 | 60 |
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Category by category
Coding o4-mini leads
Llama 3.1-405B: 33.1 (#262), o4-mini: 40.9 (#127)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| WeirdML | 21.4% | 52.6% |
| LMArena Coding | 1291 | 1368 |
| SWE-bench Verified (bash only) | — | 45% |
| Aider Polyglot | — | 72% |
| GSO | — | 3.6% |
| CadEval | — | 62% |
| ALE-Bench | — | 826.17 |
| AlgoTune | — | 1.72 |
Agentic & Tool Use o4-mini leads
Llama 3.1-405B: 21.0 (#140), o4-mini: 32.6 (#61)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 53.2% |
| GDPval | — | 25.3% |
| TheAgentCompany | 7.4% | — |
| Cybench | 7.5% | — |
| METR Time Horizons | — | 63.9% |
Reasoning o4-mini leads
Llama 3.1-405B: 16.8 (#300), o4-mini: 24.6 (#162)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| SimpleBench | 23% | 38.7% |
| Kagi LLM Benchmark | 45% | 67.6% |
| LMArena Hard Prompts | 1269 | 1351 |
| DTBench | 61.4% | 77.6% |
| Epoch Capabilities Index | 128.75 | 145.64 |
| ForecastBench | 59.9 | 61.8 |
| ARC-AGI-2 | — | 6.1% |
| ARC-AGI-1 | — | 58.7% |
| CritPt | — | 0.6% |
| Chess Puzzles | — | 26% |
| EnigmaEval | — | 9.2% |
| Mystery Game Puzzles | — | 5% |
| LMCA | — | 26.5% |
| BIG-Bench Hard | 82.9% | — |
| HellaSwag | 89.2% | — |
| PIQA | 85.9% | — |
| WinoGrande | 89.2% | — |
Math o4-mini leads
Llama 3.1-405B: 18.4 (#290), o4-mini: 40.8 (#89)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 9.7% | 81.7% |
| Omni-MATH | 24.9% | 72% |
| LMArena Math | 1281 | 1389 |
| MATH Level 5 | 49.8% | 97.8% |
| FrontierMath (Tiers 1-3) | — | 36.1% |
| FrontierMath Tier 4 | — | 4.9% |
| FrontierMath (Feb 2025 set) | — | 24.8% |
| FrontierMath Tier 4 (v1) | — | 6.3% |
Knowledge o4-mini leads
Llama 3.1-405B: 30.4 (#227), o4-mini: 43.6 (#91)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| GPQA Diamond | 50.9% | 79.6% |
| MMLU-Pro | 72.3% | 82% |
| Confabulations | 17.6% | 15.8% |
| GPQA (HELM) | 52.2% | 73.5% |
| LMArena Expert | 1243 | 1343 |
| Humanity's Last Exam | — | 18.1% |
| SimpleQA Verified | — | 19.6% |
| Vectara Hallucination Rate | — | 18.6% |
| ARC (AI2) Challenge | 95.3% | — |
| MMLU | 84.5% | — |
| TriviaQA | 82.7% | — |
Multimodal Not comparable
Llama 3.1-405B: —, o4-mini: 40.2 (#49)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| LMArena Vision | — | 1194 |
| GeoBench | — | 64% |
| VPCT | — | 57.5% |
Multilingual o4-mini leads
Llama 3.1-405B: 40.7 (#214), o4-mini: 47.0 (#154)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| LMArena Non-English | 1248 | 1337 |
| LMArena Chinese | 1242 | 1354 |
| LMArena French | 1279 | 1364 |
| LMArena German | 1252 | 1336 |
| LMArena Japanese | 1208 | 1308 |
| LMArena Korean | 1184 | 1312 |
| LMArena Russian | 1265 | 1334 |
| LMArena Spanish | 1260 | 1347 |
Instruction Following o4-mini leads
Llama 3.1-405B: 65.9 (#214), o4-mini: 75.2 (#68)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| IFEval | 81.1% | 92.8% |
| LMArena Instruction Following | 1259 | 1321 |
Long Context o4-mini leads
Llama 3.1-405B: 38.4 (#197), o4-mini: 45.5 (#33)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| LMArena Longer Query | 1266 | 1315 |
| Fiction.LiveBench | — | 77.8% |
Writing & Preference o4-mini leads
Llama 3.1-405B: 38.9 (#251), o4-mini: 54.0 (#152)
| Benchmark | Llama 3.1-405B | o4-mini |
|---|---|---|
| LMArena Text | 1284 | 1353 |
| LMArena Creative Writing | 1262 | 1294 |
| WildBench | 78.3% | 85.4% |
| LMArena Multi-Turn | 1297 | 1350 |
| Short-Story Creative Writing | — | 75% |
| EQ-Bench Creative Writing | 870 | — |
Frequently asked questions
Is Llama 3.1-405B better than o4-mini?
o4-mini is the stronger model overall, scoring 41.6 to 30.7 on the Noometry Index.
Is Llama 3.1-405B or o4-mini better for coding?
o4-mini scores higher on coding benchmarks: 40.9 versus 33.1 in the Noometry coding category.
How many benchmarks do Llama 3.1-405B and o4-mini share?
32 benchmarks have published results for both models. Llama 3.1-405B has 42 scored results on Noometry and o4-mini has 60.