Grok 4 vs Kimi K2.6
Grok 4 
Kimi K2.6 Verdict
- Grok 4 and Kimi K2.6 are level on quality (59.8 vs 59.4).
- Grok 4 is stronger in agents & tools, coding, long context, maths.
- Kimi K2.6 is stronger in human preference, instruction following, knowledge, multimodal, reasoning, composite.
- They cost about the same ($1.56 per 1M blended).
| Metric | Grok 4 | Kimi K2.6 |
|---|---|---|
| BenchLeader Index | 59.8 | 59.4 |
| Agents & tools score | 53.4 | 44.1 |
| Coding score | 61.2 | 60.3 |
| Human preference score | 59.8 | 60.7 |
| Instruction following score | 67.7 | 70.6 |
| Knowledge score | 56.0 | 57.8 |
| Long context score | 77.7 | 64.7 |
| Maths score | 58.0 | 53.8 |
| Multimodal score | 54.5 | 63.0 |
| Reasoning score | 58.3 | 66.0 |
| Composite score | – | 62.6 |
| Blended price $/M | $1.56 | $1.71 |
| Output speed | – | 36 tok/s |
| Time to first answer | – | 126.5 s |
| Context window | 256k | 262k |
| GPQA Diamond | 87.0% | 90.8% |
| FrontierMath Tiers 1–3 | – | 57.2% |
| FrontierMath Tier 4 | – | 25.6% |
| OTIS Mock AIME | 84.0% | 96.1% |
| SWE-bench Verified (Epoch) | – | 76.7% |
| SimpleQA Verified | – | 34.9% |
| Terminal-Bench | 27.2% | – |
| SimpleBench | 60.5% | – |
| OSWorld-Verified 2.0 | – | 4.6% |
| Fiction.LiveBench 120k | 96.9% | – |
| SciCode | – | 53.5% |
| Cybench | 43.0% | – |
| WeirdML | 45.7% | 55.9% |
| APEX-Agents | 15.2% | 18.9% |
| ProofBench | – | 16.0% |
| Epoch Capabilities Index | 146.4 | 151.0 |
| LMArena Text | 1411 | 1461 |
| LMArena Hard Prompts | 1420 | 1485 |
| LMArena Coding | 1435 | 1514 |
| LMArena WebDev | – | 1509 |
| LMArena Vision | 1210 | 1281 |
| AA Intelligence Index | – | 31.3 |
| IFBench | – | 76.0% |
| AA-LCR | – | 81.0% |
| MMMU-Pro | – | 79.4% |
| AA-Omniscience | – | 5.3 |
| Terminal-Bench Hard | – | 43.9% |
| GPQA Diamond (AA) | – | 91.1% |
| Humanity's Last Exam (AA) | – | 37.5% |
| SciCode (AA) | – | 51.5% |
| τ²-Bench Telecom (AA) | – | 95.9% |
| AIME (Vals) | 90.6% | – |
| LiveCodeBench | 83.3% | 86.8% |
| MMLU-Pro | 85.3% | 87.6% |
| LegalBench | 83.2% | 84.7% |
| CorpFin | 66.0% | 66.7% |
| TaxEval | 65.1% | 74.7% |
| MedQA | 92.5% | – |
| MGSM | 90.9% | – |
| Terminal-Bench 2.1 (Vals) | – | 53.6% |
| SWE-bench (Vals) | 57.8% | 76.2% |
| GPQA Diamond (Vals) | 88.1% | 89.1% |
| Vals Index | – | 43.5 |
| IMO 2025 | 21.4% | – |
| MathArena Apex | 2.1% | – |
| HiL-Bench | – | 18.7% |
| EQ-Bench 4 | – | 1202 |
| Kagi LLM Benchmark | 73.6% | – |
| IFEval (HELM) | 94.9% | – |
| Omni-MATH (HELM) | 60.3% | – |
| WildBench (HELM) | 79.7% | – |
| MMLU-Pro (HELM) | 85.1% | – |
| GPQA Diamond (HELM) | 72.6% | – |
| HELM Capabilities mean | 78.5% | – |
| Aider Polyglot | 79.6% | – |
| ARC-AGI-1 | 79.6% | – |
| ARC-AGI-2 | 29.4% | – |
| BFCL Overall | 63.0% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
Grok 4 vs Kimi K2.6: questions
- Is Grok 4 better than Kimi K2.6?
- Grok 4 and Kimi K2.6 are level on quality (59.8 vs 59.4). The BenchLeader Index combines every independent quality benchmark; Grok 4 is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is Grok 4 better than Kimi K2.6 for coding?
- Grok 4 scores higher in coding (61 vs 60 on the category index, where 50 is average).
- Is Grok 4 better than Kimi K2.6 for agentic tasks?
- Grok 4 scores higher in agentic tasks (53 vs 44 on the category index, where 50 is average).
- Which is cheaper, Grok 4 or Kimi K2.6?
- Grok 4 is cheaper: $1.56 against $1.71 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Kimi K2.6 accepts more context: 262k against 256k tokens.