Model comparison
Grok 4.1 Fast vs Llama 13b
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 24.4 on the Noometry Index.
Last verified . 8 shared benchmarks.
MetaSummary
- They share 8 benchmarks with published results for both. Grok 4.1 Fast scores higher in 6 categories and Llama 13b in 0 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 Fast leads 57.2 to 13.8.
- Llama 13b has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 Fast | Llama 13b | |
|---|---|---|
| Provider | xAI | Meta |
| Noometry Index | 41.4 | 24.4 |
| Released | 2025-06-27 | 2023-02-24 |
| Weights | Proprietary | Open |
| Context window | 128K | — |
| Max output | 30K | — |
| Input $ / M tokens | $0.20 | — |
| Output $ / M tokens | $0.50 | — |
| Results tracked | 32 | 21 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Grok 4.1 Fast leads
Grok 4.1 Fast: 34.1 (#245), Llama 13b: 21.4 (#337)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Coding | 1411 | 683 |
| LMArena WebDev | 1242 | — |
| ALE-Bench | 394.93 | — |
Agentic & Tool Use Not comparable
Grok 4.1 Fast: 36.3 (#39), Llama 13b: —
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| Berkeley Function Calling Leaderboard | 69.6% | — |
| τ²-bench Banking | 13.1% | — |
| LMArena Search | 1171 | — |
| Vending-Bench 2 | 1,107 | — |
Reasoning Grok 4.1 Fast leads
Grok 4.1 Fast: 43.4 (#49), Llama 13b: 14.0 (#329)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Hard Prompts | 1407 | 728 |
| SimpleBench | 56% | — |
| NYT Connections (extended) | 87.4% | — |
| DTBench | 87.7% | — |
| BIG-Bench Hard | — | 37.9% |
| Epoch Capabilities Index | — | 100.58 |
| ForecastBench | 61 | — |
| HellaSwag | — | 79.2% |
| LAMBADA | — | 75.2% |
| PIQA | — | 80.1% |
| WinoGrande | — | 73% |
Math Grok 4.1 Fast leads
Grok 4.1 Fast: 31.9 (#221), Llama 13b: 26.7 (#256)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Math | 1408 | 838 |
| MathArena Final-Answer Competitions | 60.9% | — |
| ProofBench | 4% | — |
| GSM8K | — | 20.6% |
Knowledge Not comparable
Grok 4.1 Fast: 33.1 (#207), Llama 13b: —
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | — |
| LMArena Expert | 1399 | — |
| ARC (AI2) Challenge | — | 52.7% |
| BoolQ | — | 78.7% |
| MMLU | — | 47.7% |
| OpenBookQA | — | 56.4% |
| TriviaQA | — | 77.9% |
Multimodal Not comparable
Grok 4.1 Fast: 37.0 (#76), Llama 13b: —
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Vision | 1201 | — |
| ScienceQA | — | 43.3% |
Multilingual Grok 4.1 Fast leads
Grok 4.1 Fast: 51.0 (#114), Llama 13b: 16.6 (#297)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Non-English | 1391 | 819 |
| LMArena Chinese | 1441 | — |
| LMArena French | 1415 | — |
| LMArena German | 1404 | — |
| LMArena Japanese | 1349 | — |
| LMArena Korean | 1361 | — |
| LMArena Russian | 1387 | — |
| LMArena Spanish | 1413 | — |
Instruction Following Grok 4.1 Fast leads
Grok 4.1 Fast: 72.7 (#133), Llama 13b: 36.7 (#305)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Instruction Following | 1376 | 781 |
Long Context Not comparable
Grok 4.1 Fast: 42.4 (#126), Llama 13b: —
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Longer Query | 1390 | — |
Writing & Preference Grok 4.1 Fast leads
Grok 4.1 Fast: 57.2 (#131), Llama 13b: 13.8 (#312)
| Benchmark | Grok 4.1 Fast | Llama 13b |
|---|---|---|
| LMArena Text | 1408 | 834 |
| LMArena Creative Writing | 1394 | 794 |
| LMArena Multi-Turn | 1389 | 753 |
| EQ-Bench Creative Writing | 1327 | — |
Frequently asked questions
Is Grok 4.1 Fast better than Llama 13b?
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 24.4 on the Noometry Index.
Is Grok 4.1 Fast or Llama 13b better for coding?
Grok 4.1 Fast scores higher on coding benchmarks: 34.1 versus 21.4 in the Noometry coding category.
How many benchmarks do Grok 4.1 Fast and Llama 13b share?
8 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Llama 13b has 21.