Model comparison
Grok-3 mini vs Grok 4.1 Fast
Grok-3 mini and Grok 4.1 Fast score almost the same on the Noometry Index (41.2 vs 41.4), so choose on price, context window or the category you care about most.
Last verified . 17 shared benchmarks.
Summary
- They share 17 benchmarks with published results for both. Grok-3 mini scores higher in 4 categories and Grok 4.1 Fast in 4 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 13.6.
Side by side
| Grok-3 mini | Grok 4.1 Fast | |
|---|---|---|
| Provider | xAI | xAI |
| Noometry Index | 41.2 | 41.4 |
| Released | 2025-04-09 | 2025-06-27 |
| Weights | Proprietary | Proprietary |
| Context window | — | 128K |
| Max output | — | 30K |
| Input $ / M tokens | — | $0.20 |
| Output $ / M tokens | — | $0.50 |
| Results tracked | 35 | 32 |
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Category by category
Coding Grok-3 mini leads
Grok-3 mini: 40.8 (#131), Grok 4.1 Fast: 34.1 (#245)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Coding | 1379 | 1411 |
| Aider Polyglot | 49.3% | — |
| LMArena WebDev | — | 1242 |
| WeirdML | 42.6% | — |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Not comparable
Grok-3 mini: —, Grok 4.1 Fast: 36.3 (#39)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| 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-3 mini: 13.6 (#334), Grok 4.1 Fast: 43.4 (#49)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Hard Prompts | 1375 | 1407 |
| ARC-AGI-2 | 0.4% | — |
| SimpleBench | — | 56% |
| Kagi LLM Benchmark | 61.3% | — |
| NYT Connections (extended) | — | 87.4% |
| ARC-AGI-1 | 16.5% | — |
| DTBench | — | 87.7% |
| Epoch Capabilities Index | 140.35 | — |
| ForecastBench | — | 61 |
Math Grok-3 mini leads
Grok-3 mini: 42.1 (#85), Grok 4.1 Fast: 31.9 (#221)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1386 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| OTIS Mock AIME 2024-2025 | 77.8% | — |
| ProofBench | — | 4% |
| Omni-MATH | 31.8% | — |
| MATH Level 5 | 90.9% | — |
| FrontierMath (Feb 2025 set) | 5.9% | — |
Knowledge Grok-3 mini leads
Grok-3 mini: 46.4 (#81), Grok 4.1 Fast: 33.1 (#207)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Expert | 1395 | 1399 |
| GPQA Diamond | 76.3% | — |
| MMLU-Pro | 79.9% | — |
| Confabulations | 10.8% | — |
| Vectara Hallucination Rate | — | 17.8% |
| GPQA (HELM) | 67.5% | — |
Multimodal Not comparable
Grok-3 mini: —, Grok 4.1 Fast: 37.0 (#76)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | — | 1201 |
Multilingual Grok 4.1 Fast leads
Grok-3 mini: 48.1 (#145), Grok 4.1 Fast: 51.0 (#114)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1352 | 1391 |
| LMArena Chinese | 1387 | 1441 |
| LMArena French | 1357 | 1415 |
| LMArena German | 1349 | 1404 |
| LMArena Japanese | 1342 | 1349 |
| LMArena Korean | 1335 | 1361 |
| LMArena Russian | 1353 | 1387 |
| LMArena Spanish | 1381 | 1413 |
Instruction Following Grok-3 mini leads
Grok-3 mini: 78.5 (#9), Grok 4.1 Fast: 72.7 (#133)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1357 | 1376 |
| IFEval | 95.1% | — |
Long Context Grok 4.1 Fast leads
Grok-3 mini: 41.0 (#147), Grok 4.1 Fast: 42.4 (#126)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1372 | 1390 |
| Fiction.LiveBench | 66.7% | — |
Writing & Preference Grok 4.1 Fast leads
Grok-3 mini: 52.5 (#169), Grok 4.1 Fast: 57.2 (#131)
| Benchmark | Grok-3 mini | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1370 | 1408 |
| LMArena Creative Writing | 1342 | 1394 |
| LMArena Multi-Turn | 1355 | 1389 |
| Short-Story Creative Writing | 73.5% | — |
| EQ-Bench Creative Writing | — | 1327 |
| WildBench | 65.1% | — |
Frequently asked questions
Is Grok-3 mini better than Grok 4.1 Fast?
Grok-3 mini and Grok 4.1 Fast score almost the same on the Noometry Index (41.2 vs 41.4), so choose on price, context window or the category you care about most.
Is Grok-3 mini or Grok 4.1 Fast better for coding?
Grok-3 mini scores higher on coding benchmarks: 40.8 versus 34.1 in the Noometry coding category.
How many benchmarks do Grok-3 mini and Grok 4.1 Fast share?
17 benchmarks have published results for both models. Grok-3 mini has 35 scored results on Noometry and Grok 4.1 Fast has 32.