Grok 4 vs Kimi K3
Grok 4 
Kimi K3 Verdict
- Kimi K3 leads on quality: 66.5 vs 58.6.
- Grok 4 is stronger in instruction following, reasoning.
- Kimi K3 is stronger in agents & tools, coding, composite, human preference, knowledge, long context, maths, multimodal.
- Grok 4 is 3.8× cheaper ($1.56 vs $6.00 per 1M blended).
| Metric | Grok 4 | Kimi K3 |
|---|---|---|
| BenchLeader Index | 58.6 | 66.5 |
| Agents & tools score | 55.3 | 67.4 |
| Coding score | 61.2 | 65.0 |
| Composite score | 57.4 | 74.3 |
| Human preference score | 59.8 | 71.2 |
| Instruction following score | 62.4 | – |
| Knowledge score | 58.3 | 68.2 |
| Long context score | 69.0 | 71.0 |
| Maths score | 58.0 | 78.1 |
| Multimodal score | 53.8 | 65.1 |
| Reasoning score | 58.3 | – |
| Blended price $/M | $1.56 | $6.00 |
| Output speed | – | 38 tok/s |
| Time to first answer | – | 56.0 s |
| Context window | 256k | 1.0M |
| GPQA Diamond | 87.0% | – |
| OTIS Mock AIME | 84.0% | – |
| Terminal-Bench | 27.2% | – |
| SimpleBench | 60.5% | – |
| Fiction.LiveBench 120k | 96.9% | – |
| SciCode | – | 58.7% |
| Cybench | 43.0% | – |
| WeirdML | 45.7% | – |
| APEX-Agents | 15.2% | 39.3% |
| FrontierCode | – | 44.2% |
| ProofBench | – | 87.0% |
| Epoch Capabilities Index | 146.4 | 157.6 |
| LMArena Text | 1411 | – |
| LMArena Hard Prompts | 1420 | – |
| LMArena Coding | 1435 | – |
| LMArena Vision | 1210 | – |
| LiveBench | – | 79.2% |
| LiveBench Reasoning | – | 90.7% |
| LiveBench Coding | – | 81.5% |
| LiveBench Agentic Coding | – | 62.2% |
| LiveBench Mathematics | – | 84.4% |
| LiveBench Data Analysis | – | 78.7% |
| LiveBench Language | – | 85.5% |
| AA Intelligence Index | 22.5 | 43.8 |
| IFBench | 53.7% | – |
| AA-LCR | 68.0% | 88.7% |
| MMMU-Pro | 68.8% | 80.5% |
| AA-Omniscience | 2.1 | 19.7 |
| Terminal-Bench Hard | 37.9% | – |
| GPQA Diamond (AA) | 87.7% | 93.5% |
| Humanity's Last Exam (AA) | 26.7% | 46.9% |
| SciCode (AA) | – | 59.5% |
| τ²-Bench Telecom (AA) | 74.8% | – |
| AIME (Vals) | 90.6% | – |
| LiveCodeBench | 83.3% | – |
| MMLU-Pro | 85.3% | – |
| LegalBench | 83.2% | 86.0% |
| CorpFin | 66.0% | 71.6% |
| TaxEval | 65.1% | 75.7% |
| MedQA | 92.5% | – |
| MGSM | 90.9% | – |
| Terminal-Bench 2.1 (Vals) | – | 80.9% |
| SWE-bench (Vals) | 57.8% | 93.4% |
| GPQA Diamond (Vals) | 88.1% | 92.9% |
| Vals Index | – | 57.8 |
| IMO 2025 | 21.4% | – |
| MathArena Apex | 2.1% | – |
| EQ-Bench 4 | – | 1339 |
| 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 2026-09-12. Best configuration of each model; every score links to its source on the model pages.
Grok 4 vs Kimi K3: questions
- Is Grok 4 better than Kimi K3?
- Kimi K3 leads on quality: 66.5 vs 58.6. The BenchLeader Index combines every independent quality benchmark; Kimi K3 is ahead overall as of 2026-09-12, but check the category scores for your use.
- Is Grok 4 better than Kimi K3 for coding?
- Kimi K3 scores higher in coding (65 vs 61 on the category index, where 50 is average).
- Is Grok 4 better than Kimi K3 for agentic tasks?
- Kimi K3 scores higher in agentic tasks (67 vs 55 on the category index, where 50 is average).
- Which is cheaper, Grok 4 or Kimi K3?
- Grok 4 is cheaper: $1.56 against $6.00 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Kimi K3 accepts more context: 1.0M against 256k tokens.