Model comparison
Grok 4.1 vs Kimi K2 (Jul 2025)
Grok 4.1 and Kimi K2 (Jul 2025) score almost the same on the Noometry Index (41.5 vs 41.2), 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 4.1 scores higher in 7 categories and Kimi K2 (Jul 2025) in 2 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Kimi K2 (Jul 2025) leads 42.4 to 33.7.
- Kimi K2 (Jul 2025) has downloadable open weights; the other is API-only.
Side by side
| Grok 4.1 | Kimi K2 (Jul 2025) | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 41.5 | 41.2 |
| Released | 2025-11-17 | 2025-07-12 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.57 |
| Output $ / M tokens | — | $2.30 |
| Results tracked | 19 | 42 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Kimi K2 (Jul 2025) leads
Grok 4.1: 33.7 (#253), Kimi K2 (Jul 2025): 42.4 (#102)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Coding | 1445 | 1399 |
| SWE-bench Verified (bash only) | — | 63.4% |
| Aider Polyglot | — | 59.1% |
| LMArena WebDev | 1214 | — |
| GSO | — | 4.9% |
| WeirdML | — | 42.8% |
| ALE-Bench | — | 597.5 |
Agentic & Tool Use Grok 4.1 leads
Grok 4.1: 34.1 (#49), Kimi K2 (Jul 2025): 32.4 (#64)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| Terminal-Bench | — | 35.7% |
| Berkeley Function Calling Leaderboard | — | 59.1% |
| Cybench | 39% | — |
| METR Time Horizons | — | 59.2% |
Reasoning Grok 4.1 leads
Grok 4.1: 29.5 (#91), Kimi K2 (Jul 2025): 23.3 (#179)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Hard Prompts | 1435 | 1384 |
| SimpleBench | — | 26.3% |
| Kagi LLM Benchmark | — | 64.4% |
| Epoch Capabilities Index | — | 146.01 |
| ForecastBench | — | 60.2 |
Math Kimi K2 (Jul 2025) leads
Grok 4.1: 38.9 (#120), Kimi K2 (Jul 2025): 42.7 (#83)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Math | 1422 | 1397 |
| Omni-MATH | — | 65.4% |
| FrontierMath (Feb 2025 set) | — | 21.4% |
| FrontierMath Tier 4 (v1) | — | 0% |
Knowledge Grok 4.1 leads
Grok 4.1: 39.5 (#133), Kimi K2 (Jul 2025): 37.3 (#157)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Expert | 1417 | 1365 |
| MMLU-Pro | — | 81.9% |
| Confabulations | — | 20.4% |
| Vectara Hallucination Rate | — | 17.9% |
| GPQA (HELM) | — | 65.3% |
Multilingual Grok 4.1 leads
Grok 4.1: 53.4 (#68), Kimi K2 (Jul 2025): 49.6 (#130)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Non-English | 1425 | 1372 |
| LMArena Chinese | 1465 | 1415 |
| LMArena French | 1448 | 1379 |
| LMArena German | 1446 | 1387 |
| LMArena Japanese | 1397 | 1349 |
| LMArena Korean | 1407 | 1325 |
| LMArena Russian | 1434 | 1385 |
| LMArena Spanish | 1438 | 1386 |
Instruction Following Grok 4.1 leads
Grok 4.1: 73.8 (#111), Kimi K2 (Jul 2025): 71.1 (#156)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Instruction Following | 1400 | 1348 |
| IFEval | — | 85% |
Long Context Grok 4.1 leads
Grok 4.1: 43.2 (#100), Kimi K2 (Jul 2025): 41.2 (#145)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Longer Query | 1416 | 1353 |
| Fiction.LiveBench | — | 66.7% |
| CL-bench | — | 17.6% |
Writing & Preference Too close to call
Grok 4.1: 62.4 (#75), Kimi K2 (Jul 2025): 62.3 (#78)
| Benchmark | Grok 4.1 | Kimi K2 (Jul 2025) |
|---|---|---|
| LMArena Text | 1437 | 1380 |
| LMArena Creative Writing | 1411 | 1350 |
| LMArena Multi-Turn | 1437 | 1371 |
| Short-Story Creative Writing | — | 85.6% |
| EQ-Bench Creative Writing | — | 1666 |
| WildBench | — | 86.2% |
Frequently asked questions
Is Grok 4.1 better than Kimi K2 (Jul 2025)?
Grok 4.1 and Kimi K2 (Jul 2025) score almost the same on the Noometry Index (41.5 vs 41.2), so choose on price, context window or the category you care about most.
Is Grok 4.1 or Kimi K2 (Jul 2025) better for coding?
Kimi K2 (Jul 2025) scores higher on coding benchmarks: 42.4 versus 33.7 in the Noometry coding category.
How many benchmarks do Grok 4.1 and Kimi K2 (Jul 2025) share?
17 benchmarks have published results for both models. Grok 4.1 has 19 scored results on Noometry and Kimi K2 (Jul 2025) has 42.