Model comparison
Grok 4.1 Fast vs Wizardlm 13b
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 31.4 on the Noometry Index.
Last verified . 10 shared benchmarks.
MicrosoftSummary
- They share 10 benchmarks with published results for both. Grok 4.1 Fast scores higher in 7 categories and Wizardlm 13b in 0 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where Grok 4.1 Fast leads 57.2 to 30.5.
- Wizardlm 13b has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 Fast | Wizardlm 13b | |
|---|---|---|
| Provider | xAI | Microsoft |
| Noometry Index | 41.4 | 31.4 |
| Released | 2025-06-27 | — |
| Weights | Proprietary | Open |
| Context window | 128K | — |
| Max output | 30K | — |
| Input $ / M tokens | $0.20 | — |
| Output $ / M tokens | $0.50 | — |
| Results tracked | 32 | 10 |
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Category by category
Coding Grok 4.1 Fast leads
Grok 4.1 Fast: 34.1 (#245), Wizardlm 13b: 30.1 (#298)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Coding | 1411 | 1035 |
| LMArena WebDev | 1242 | — |
| ALE-Bench | 394.93 | — |
Agentic & Tool Use Not comparable
Grok 4.1 Fast: 36.3 (#39), Wizardlm 13b: —
| Benchmark | Grok 4.1 Fast | Wizardlm 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), Wizardlm 13b: 19.4 (#259)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Hard Prompts | 1407 | 1018 |
| SimpleBench | 56% | — |
| NYT Connections (extended) | 87.4% | — |
| DTBench | 87.7% | — |
| ForecastBench | 61 | — |
Math Grok 4.1 Fast leads
Grok 4.1 Fast: 31.9 (#221), Wizardlm 13b: 30.2 (#238)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Math | 1408 | 1017 |
| MathArena Final-Answer Competitions | 60.9% | — |
| ProofBench | 4% | — |
Knowledge Not comparable
Grok 4.1 Fast: 33.1 (#207), Wizardlm 13b: —
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| Vectara Hallucination Rate | 17.8% | — |
| LMArena Expert | 1399 | — |
Multimodal Not comparable
Grok 4.1 Fast: 37.0 (#76), Wizardlm 13b: —
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Vision | 1201 | — |
Multilingual Grok 4.1 Fast leads
Grok 4.1 Fast: 51.0 (#114), Wizardlm 13b: 27.1 (#277)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Non-English | 1391 | 1034 |
| LMArena Chinese | 1441 | 1023 |
| 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), Wizardlm 13b: 53.5 (#285)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Instruction Following | 1376 | 1048 |
Long Context Grok 4.1 Fast leads
Grok 4.1 Fast: 42.4 (#126), Wizardlm 13b: 32.0 (#273)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Longer Query | 1390 | 1054 |
Writing & Preference Grok 4.1 Fast leads
Grok 4.1 Fast: 57.2 (#131), Wizardlm 13b: 30.5 (#287)
| Benchmark | Grok 4.1 Fast | Wizardlm 13b |
|---|---|---|
| LMArena Text | 1408 | 1077 |
| LMArena Creative Writing | 1394 | 1091 |
| LMArena Multi-Turn | 1389 | 1047 |
| EQ-Bench Creative Writing | 1327 | — |
Frequently asked questions
Is Grok 4.1 Fast better than Wizardlm 13b?
Grok 4.1 Fast is the stronger model overall, scoring 41.4 to 31.4 on the Noometry Index.
Is Grok 4.1 Fast or Wizardlm 13b better for coding?
Grok 4.1 Fast scores higher on coding benchmarks: 34.1 versus 30.1 in the Noometry coding category.
How many benchmarks do Grok 4.1 Fast and Wizardlm 13b share?
10 benchmarks have published results for both models. Grok 4.1 Fast has 32 scored results on Noometry and Wizardlm 13b has 10.