Model comparison
Grok 4.1 vs Llama 3.1-405B
Grok 4.1 is the stronger model overall, scoring 40.8 to 30.4 on the Noometry Index.
Last verified . 18 shared benchmarks.
MetaSummary
- They share 18 benchmarks with published results for both. Grok 4.1 scores higher in 9 categories and Llama 3.1-405B in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 leads 62.6 to 39.1.
- The biggest single-benchmark swing is Cybench: 39% for Grok 4.1 and 7.5% for Llama 3.1-405B.
- Llama 3.1-405B has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 | Llama 3.1-405B | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 40.8 | 30.4 |
| Released | 2025-11-17 | 2024-07-23 |
| Weights | Proprietary | Open |
| Context window | — | — |
| Max output | — | — |
| Input $ / M tokens | — | — |
| Output $ / M tokens | — | — |
| Results tracked | 19 | 42 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Too close to call
Grok 4.1: 33.4 (#246), Llama 3.1-405B: 32.7 (#257)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Coding | 1445 | 1291 |
| LMArena WebDev | 1214 | — |
| WeirdML | — | 21.4% |
Agentic & Tool Use Grok 4.1 leads
Grok 4.1: 33.8 (#47), Llama 3.1-405B: 20.9 (#131)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| Cybench | 39% | 7.5% |
| TheAgentCompany | — | 7.4% |
Reasoning Grok 4.1 leads
Grok 4.1: 28.3 (#91), Llama 3.1-405B: 16.4 (#293)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Hard Prompts | 1436 | 1270 |
| SimpleBench | — | 23% |
| Kagi LLM Benchmark | — | 45% |
| DTBench | — | 61.4% |
| BIG-Bench Hard | — | 82.9% |
| Epoch Capabilities Index | — | 128.76 |
| ForecastBench | — | 59.9 |
| HellaSwag | — | 89.2% |
| PIQA | — | 85.9% |
| WinoGrande | — | 89.2% |
Math Grok 4.1 leads
Grok 4.1: 36.2 (#124), Llama 3.1-405B: 17.3 (#283)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Math | 1422 | 1281 |
| OTIS Mock AIME 2024-2025 | — | 9.7% |
| Omni-MATH | — | 24.9% |
| MATH Level 5 | — | 49.8% |
Knowledge Grok 4.1 leads
Grok 4.1: 38.9 (#129), Llama 3.1-405B: 30.4 (#221)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Expert | 1417 | 1243 |
| GPQA Diamond | — | 50.9% |
| MMLU-Pro | — | 72.3% |
| Confabulations | — | 17.6% |
| GPQA (HELM) | — | 52.2% |
| ARC (AI2) Challenge | — | 95.3% |
| MMLU | — | 84.5% |
| TriviaQA | — | 82.7% |
Multilingual Grok 4.1 leads
Grok 4.1: 53.6 (#64), Llama 3.1-405B: 40.9 (#209)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Non-English | 1425 | 1248 |
| LMArena Chinese | 1464 | 1242 |
| LMArena French | 1448 | 1278 |
| LMArena German | 1447 | 1252 |
| LMArena Japanese | 1396 | 1208 |
| LMArena Korean | 1407 | 1184 |
| LMArena Russian | 1434 | 1265 |
| LMArena Spanish | 1438 | 1259 |
Instruction Following Grok 4.1 leads
Grok 4.1: 74.0 (#106), Llama 3.1-405B: 66.1 (#209)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Instruction Following | 1400 | 1259 |
| IFEval | — | 81.1% |
Long Context Grok 4.1 leads
Grok 4.1: 43.2 (#96), Llama 3.1-405B: 38.4 (#192)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Longer Query | 1416 | 1266 |
Writing & Preference Grok 4.1 leads
Grok 4.1: 62.6 (#71), Llama 3.1-405B: 39.1 (#246)
| Benchmark | Grok 4.1 | Llama 3.1-405B |
|---|---|---|
| LMArena Text | 1437 | 1284 |
| LMArena Creative Writing | 1411 | 1262 |
| LMArena Multi-Turn | 1438 | 1297 |
| EQ-Bench Creative Writing | — | 870 |
| WildBench | — | 78.3% |
Frequently asked questions
Is Grok 4.1 better than Llama 3.1-405B?
Grok 4.1 is the stronger model overall, scoring 40.8 to 30.4 on the Noometry Index.
Is Grok 4.1 or Llama 3.1-405B better for coding?
They score almost the same on coding (33.4 vs 32.7); test both on your own repository before choosing.
How many benchmarks do Grok 4.1 and Llama 3.1-405B share?
18 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Llama 3.1-405B has 42.