Model comparison
Grok 4.1 vs Kimi K3
Kimi K3 is the stronger model overall, scoring 59.5 to 41.5 on the Noometry Index.
Last verified . 18 shared benchmarks.
Summary
- They share 18 benchmarks with published results for both. Grok 4.1 scores higher in 0 categories and Kimi K3 in 9 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in math, where Kimi K3 leads 74.2 to 38.9.
- Kimi K3 has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 | Kimi K3 | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 41.5 | 59.5 |
| Released | 2025-11-17 | 2026-07-16 |
| Weights | Proprietary | Open |
| Context window | — | 1.05M |
| Max output | — | 1.05M |
| Input $ / M tokens | — | $3 |
| Output $ / M tokens | — | $15 |
| Results tracked | 19 | 53 |
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Category by category
Coding Kimi K3 leads
Grok 4.1: 33.7 (#253), Kimi K3: 61.0 (#10)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena WebDev | 1214 | 1654 |
| LMArena Coding | 1445 | 1508 |
| DeepSWE | — | 68.5% |
| FrontierCode | — | 44.2% |
| FrontierSWE | — | 25.9% |
| SciCode | — | 59.5% |
| WeirdML | — | 82.6% |
| ALE-Bench | — | 1,524 |
Agentic & Tool Use Kimi K3 leads
Grok 4.1: 34.1 (#49), Kimi K3: 41.8 (#20)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| APEX-Agents | — | 50.6% |
| τ²-bench Banking | — | 37.1% |
| Cybench | 39% | — |
| PostTrainBench | — | 32% |
| GBAEval | — | 48.3% |
| GDP.pdf | — | 19% |
| Vending-Bench 2 | — | 5,165 |
Reasoning Kimi K3 leads
Grok 4.1: 29.5 (#91), Kimi K3: 63.0 (#17)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Hard Prompts | 1435 | 1496 |
| ARC-AGI-2 | — | 60.4% |
| SimpleBench | — | 60.7% |
| NYT Connections (extended) | — | 93.6% |
| ARC-AGI-1 | — | 94.5% |
| CritPt | — | 23.4% |
| Chess Puzzles | — | 39% |
| Mystery Game Puzzles | — | 26% |
| DTBench | — | 91.2% |
| LMCA | — | 52.7% |
| Surface Evolver Bench | — | 95% |
| Epoch Capabilities Index | — | 157.45 |
| ForecastBench | — | 61.1 |
Math Kimi K3 leads
Grok 4.1: 38.9 (#120), Kimi K3: 74.2 (#16)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Math | 1422 | 1491 |
| FrontierMath (Tiers 1-3) | — | 72.2% |
| FrontierMath Tier 4 | — | 39% |
| MathArena Final-Answer Competitions | — | 87.8% |
| OTIS Mock AIME 2024-2025 | — | 97.2% |
| ProofBench | — | 87% |
Knowledge Kimi K3 leads
Grok 4.1: 39.5 (#133), Kimi K3: 63.2 (#21)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Expert | 1417 | 1521 |
| GPQA Diamond | — | 93.1% |
| SimpleQA Verified | — | 50.6% |
Multimodal Not comparable
Grok 4.1: —, Kimi K3: 37.8 (#70)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| Blueprint-Bench 2 | — | 29.5% |
| Furniture Assembly | — | 34.2% |
Multilingual Kimi K3 leads
Grok 4.1: 53.4 (#68), Kimi K3: 56.3 (#21)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Non-English | 1425 | 1466 |
| LMArena Chinese | 1465 | 1529 |
| LMArena French | 1448 | 1491 |
| LMArena German | 1446 | 1488 |
| LMArena Japanese | 1397 | 1487 |
| LMArena Korean | 1407 | 1458 |
| LMArena Russian | 1434 | 1482 |
| LMArena Spanish | 1438 | 1472 |
Instruction Following Kimi K3 leads
Grok 4.1: 73.8 (#111), Kimi K3: 77.7 (#14)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Instruction Following | 1400 | 1483 |
Long Context Kimi K3 leads
Grok 4.1: 43.2 (#100), Kimi K3: 45.8 (#29)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Longer Query | 1416 | 1494 |
Writing & Preference Kimi K3 leads
Grok 4.1: 62.4 (#75), Kimi K3: 76.6 (#4)
| Benchmark | Grok 4.1 | Kimi K3 |
|---|---|---|
| LMArena Text | 1437 | 1476 |
| LMArena Creative Writing | 1411 | 1454 |
| LMArena Multi-Turn | 1437 | 1488 |
| EQ-Bench Creative Writing | — | 2082 |
| EQ-Bench 4 | — | 1339 |
Frequently asked questions
Is Grok 4.1 better than Kimi K3?
Kimi K3 is the stronger model overall, scoring 59.5 to 41.5 on the Noometry Index.
Is Grok 4.1 or Kimi K3 better for coding?
Kimi K3 scores higher on coding benchmarks: 61.0 versus 33.7 in the Noometry coding category.
How many benchmarks do Grok 4.1 and Kimi K3 share?
18 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Kimi K3 has 53.