Grok 4.1 vs Kimi K3
Grok 4.1 
Kimi K3 Verdict
- Kimi K3 leads on quality: 65.7 vs 57.4.
- Grok 4.1 (thinking) is stronger in agents & tools, reasoning.
- Kimi K3 is stronger in coding, human preference, knowledge, maths, multimodal, composite, long context.
- Grok 4.1 (thinking) is 3.8× cheaper ($1.56 vs $6.00 per 1M blended).
| Metric | Grok 4.1 (thinking) | Kimi K3 |
|---|---|---|
| BenchLeader Index | 57.4 | 65.7 |
| Agents & tools score | 78.3 | 67.4 |
| Coding score | 47.5 | 65.0 |
| Human preference score | 66.4 | 71.2 |
| Knowledge score | 57.2 | 66.8 |
| Maths score | 48.3 | 78.1 |
| Multimodal score | 53.2 | 64.0 |
| Reasoning score | 58.9 | – |
| Composite score | – | 70.6 |
| Long context score | – | 69.2 |
| Blended price $/M | $1.56 | $6.00 |
| Output speed | – | 37 tok/s |
| Time to first answer | – | 57.9 s |
| Context window | 2M | 1.0M |
| SimpleBench | 56.0% | – |
| SciCode | – | 58.7% |
| APEX-Agents | – | 39.3% |
| FrontierCode | – | 44.2% |
| ProofBench | 4.0% | 87.0% |
| Epoch Capabilities Index | – | 157.6 |
| LMArena Text | 1465 | – |
| LMArena Hard Prompts | 1477 | – |
| LMArena Coding | 1499 | – |
| LMArena WebDev | 1240 | – |
| LMArena Vision | 1199 | – |
| 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 | – | 43.8 |
| AA-LCR | – | 88.7% |
| MMMU-Pro | – | 80.5% |
| AA-Omniscience | – | 19.7 |
| GPQA Diamond (AA) | – | 93.5% |
| Humanity's Last Exam (AA) | – | 46.9% |
| SciCode (AA) | – | 59.5% |
| AIME (Vals) | 91.9% | – |
| LiveCodeBench | 80.6% | – |
| MMLU-Pro | 84.2% | – |
| LegalBench | 82.5% | 86.0% |
| CorpFin | 66.0% | 71.6% |
| TaxEval | 73.1% | 75.7% |
| MedQA | 92.1% | – |
| MGSM | 89.5% | – |
| Terminal-Bench 2.1 (Vals) | – | 80.9% |
| SWE-bench (Vals) | 41.4% | 93.4% |
| GPQA Diamond (Vals) | 84.3% | 92.9% |
| Vals Index | – | 57.8 |
| AIME 2026 | 94.2% | – |
| HMMT February 2026 | 86.4% | – |
| MathArena Apex | 5.2% | – |
| EQ-Bench 4 | – | 1339 |
| BFCL Overall | 69.6% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
Grok 4.1 vs Kimi K3: questions
- Is Grok 4.1 better than Kimi K3?
- Kimi K3 leads on quality: 65.7 vs 57.4. The BenchLeader Index combines every independent quality benchmark; Kimi K3 is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is Grok 4.1 better than Kimi K3 for coding?
- Kimi K3 scores higher in coding (65 vs 48 on the category index, where 50 is average).
- Is Grok 4.1 better than Kimi K3 for agentic tasks?
- Grok 4.1 scores higher in agentic tasks (78 vs 67 on the category index, where 50 is average).
- Which is cheaper, Grok 4.1 or Kimi K3?
- Grok 4.1 is cheaper: $1.56 against $6.00 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Grok 4.1 accepts more context: 2M against 1.0M tokens.