Model comparison
Grok 4 vs Kimi K2.6
Grok 4 and Kimi K2.6 score almost the same on the Noometry Index (48.1 vs 47.7), so choose on price, context window or the category you care about most.
Last verified . 25 shared benchmarks.
Summary
- They share 25 benchmarks with published results for both. Grok 4 scores higher in 4 categories and Kimi K2.6 in 6 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in long context, where Grok 4 leads 63.1 to 44.9.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 84% for Grok 4 and 96.1% for Kimi K2.6.
- Kimi K2.6 has downloadable open weights; the other is API-only.
Side by side
| Grok 4 | Kimi K2.6 | |
|---|---|---|
| Provider | xAI | Moonshot AI |
| Noometry Index | 48.1 | 47.7 |
| Released | 2025-07-09 | 2026-04-20 |
| Weights | Proprietary | Open |
| Context window | — | 262K |
| Max output | — | 262K |
| Input $ / M tokens | — | $0.95 |
| Output $ / M tokens | — | $4 |
| Results tracked | 48 | 51 |
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Category by category
Coding Too close to call
Grok 4: 50.3 (#46), Kimi K2.6: 50.7 (#43)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| WeirdML | 45.7% | 55.9% |
| LMArena Coding | 1408 | 1488 |
| SWE-bench Verified | — | 76.7% |
| Aider Polyglot | 79.6% | — |
| LMArena WebDev | — | 1509 |
| SciCode | — | 53.5% |
| ALE-Bench | — | 1,093 |
Agentic & Tool Use Grok 4 leads
Grok 4: 32.3 (#68), Kimi K2.6: 21.9 (#137)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| Terminal-Bench | 27.2% | — |
| Berkeley Function Calling Leaderboard | 63% | — |
| OSWorld 2.0 | — | 4.6% |
| GDPval | 21.1% | — |
| Cybench | 43% | — |
| DeepResearch Bench | 47.3% | — |
| BALROG | 43.6% | — |
| ExploitBench | — | 18.4% |
| GBAEval | — | 0.9% |
| GDP.pdf | — | 12% |
| LMArena Search | 1142 | — |
| METR Time Horizons | 66.6% | — |
| Vending-Bench 2 | — | 6,205 |
Reasoning Kimi K2.6 leads
Grok 4: 36.7 (#65), Kimi K2.6: 40.5 (#55)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| Chess Puzzles | 28% | 26% |
| LMArena Hard Prompts | 1409 | 1470 |
| Epoch Capabilities Index | 146.44 | 151.05 |
| ARC-AGI-2 | 16% | — |
| SimpleBench | 60.5% | — |
| Kagi LLM Benchmark | 73.6% | — |
| NYT Connections (extended) | — | 87.2% |
| ARC-AGI-1 | 66.7% | — |
| CritPt | — | 8% |
| EBR-Bench | — | 2.4% |
| Mystery Game Puzzles | — | 18% |
| DTBench | — | 90.9% |
| LMCA | — | 37.3% |
| ForecastBench | 60.9 | — |
Math Kimi K2.6 leads
Grok 4: 48.4 (#64), Kimi K2.6: 57.0 (#41)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 84% | 96.1% |
| LMArena Math | 1422 | 1475 |
| FrontierMath (Feb 2025 set) | 19.7% | 39% |
| FrontierMath Tier 4 (v1) | 2.1% | 14.6% |
| FrontierMath (Tiers 1-3) | — | 57.2% |
| FrontierMath Tier 4 | — | 25.6% |
| MathArena Final-Answer Competitions | — | 72.9% |
| ProofBench | — | 16% |
| Omni-MATH | 60.3% | — |
Knowledge Too close to call
Grok 4: 53.8 (#55), Kimi K2.6: 54.0 (#54)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| GPQA Diamond | 87% | 90.8% |
| LMArena Expert | 1415 | 1491 |
| SimpleQA Verified | — | 34.9% |
| MMLU-Pro | 85.1% | — |
| Confabulations | 12.4% | — |
| Vectara Hallucination Rate | — | 10.8% |
| GPQA (HELM) | 72.7% | — |
Multimodal Grok 4 leads
Grok 4: 33.7 (#94), Kimi K2.6: 31.6 (#103)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| LMArena Vision | 1210 | 1283 |
| GeoBench | 45% | — |
| Blueprint-Bench 2 | — | 3.9% |
| Furniture Assembly | — | 21.7% |
| LMArena Document | — | 1451 |
Multilingual Kimi K2.6 leads
Grok 4: 51.8 (#103), Kimi K2.6: 54.9 (#37)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| LMArena Non-English | 1403 | 1446 |
| LMArena Chinese | 1427 | 1521 |
| LMArena French | 1418 | 1471 |
| LMArena German | 1429 | 1450 |
| LMArena Japanese | 1394 | 1443 |
| LMArena Korean | 1377 | 1427 |
| LMArena Russian | 1410 | 1446 |
| LMArena Spanish | 1420 | 1464 |
Instruction Following Grok 4 leads
Grok 4: 79.2 (#5), Kimi K2.6: 76.3 (#43)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| LMArena Instruction Following | 1387 | 1451 |
| IFEval | 94.9% | — |
Long Context Grok 4 leads
Grok 4: 63.1 (#4), Kimi K2.6: 44.9 (#52)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| LMArena Longer Query | 1409 | 1468 |
| Fiction.LiveBench | 94.4% | — |
Writing & Preference Kimi K2.6 leads
Grok 4: 58.5 (#116), Kimi K2.6: 68.5 (#26)
| Benchmark | Grok 4 | Kimi K2.6 |
|---|---|---|
| LMArena Text | 1411 | 1455 |
| LMArena Creative Writing | 1397 | 1434 |
| LMArena Multi-Turn | 1416 | 1453 |
| Short-Story Creative Writing | 76.9% | — |
| EQ-Bench Creative Writing | — | 1725 |
| WildBench | 79.7% | — |
| EQ-Bench 4 | — | 1202 |
Frequently asked questions
Is Grok 4 better than Kimi K2.6?
Grok 4 and Kimi K2.6 score almost the same on the Noometry Index (48.1 vs 47.7), so choose on price, context window or the category you care about most.
Is Grok 4 or Kimi K2.6 better for coding?
They score almost the same on coding (50.3 vs 50.7); test both on your own repository before choosing.
How many benchmarks do Grok 4 and Kimi K2.6 share?
25 benchmarks have published results for both models. Grok 4 has 48 scored results on Noometry and Kimi K2.6 has 51.