Grok 4.20 Multi-Agent vs Kimi K3
Grok 4.20 Multi-Agent 
Kimi K3 Verdict
- Kimi K3 (max) leads on quality: 67.1 vs 59.2.
- Kimi K3 (max) is stronger in coding, human preference, maths, multimodal, reasoning, agents & tools, composite, knowledge, long context.
- Grok 4.20 Multi-Agent is 3.8× cheaper ($1.56 vs $6.00 per 1M blended).
- Grok 4.20 Multi-Agent streams 7.1× faster (304 vs 43 tokens per second).
| Metric | Grok 4.20 Multi-Agent | Kimi K3 (max) |
|---|---|---|
| BenchLeader Index | 59.2 | 67.1 |
| Coding score | 65.5 | 67.0 |
| Human preference score | 67.0 | 68.8 |
| Maths score | 64.4 | 65.3 |
| Multimodal score | 60.4 | 65.1 |
| Reasoning score | 65.9 | 68.6 |
| Agents & tools score | – | 67.5 |
| Composite score | – | 84.0 |
| Knowledge score | – | 64.4 |
| Long context score | – | 70.9 |
| Blended price $/M | $1.56 | $6.00 |
| Output speed | 304 tok/s | 43 tok/s |
| Time to first answer | 9.9 s | 50.5 s |
| Context window | 1M | 1.0M |
| GPQA Diamond | – | 93.1% |
| FrontierMath Tiers 1–3 | – | 72.2% |
| FrontierMath Tier 4 | – | 39.0% |
| OTIS Mock AIME | – | 97.2% |
| SimpleQA Verified | – | 50.6% |
| SimpleBench | – | 60.7% |
| SciCode | – | 58.7% |
| WeirdML | – | 82.6% |
| LMArena Text | 1470 | 1485 |
| LMArena Hard Prompts | 1483 | 1514 |
| LMArena Coding | 1508 | 1538 |
| LMArena WebDev | – | 1674 |
| LMArena Vision | 1260 | – |
| LMArena Agent | – | 6.2 |
| AA Intelligence Index | – | 43.6 |
| 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% |
| LiveCodeBench | – | 87.2% |
| MMLU-Pro | – | 88.0% |
| IOI | – | 48.9% |
| MCP Atlas | – | 82.3% |
| ARC-AGI-1 | – | 94.5% |
| ARC-AGI-2 | – | 60.4% |
| CritPt | – | 23.4% |
| GDPval (AA) | – | 51.2% |
| τ²-Bench Banking (AA) | – | 46.0% |
| ITBench SRE (AA) | – | 47.7% |
| Analyst Agent (AA) | – | 38.8% |
| APEX-Agents (AA) | – | 41.3% |
| BioMysteryBench | – | 71.5% |
| Code Migration | – | 16.1% |
| Excel Modeling Benchmark | – | 66.4% |
| Tax Agent Bench | – | 68.7% |
| Terminal-Bench 4.0 (Vals) | – | 12.6% |
| Terminal-Bench Science | – | 2.9% |
| Time Horizon Index: KSP | – | 10.5% |
| Vibe Code Bench 1-100 | – | 18.2% |
| FORTRESS | – | 26.6% |
| LMArena Maths | 1453 | 1501 |
| LMArena Creative Writing | 1448 | 1458 |
| LMArena Instruction Following | 1443 | 1484 |
| LMArena Multi-turn | 1473 | 1496 |
| LMArena Longer Queries | 1457 | 1500 |
| LMArena Search | 1205 | – |
| Chess Puzzles | – | 39.0% |
| Mystery Game Puzzles | – | 26.0% |
| Surface Evolver Bench | – | 93.0% |
| DeepSWE | – | 68.5% |
| LMCA | – | 52.7% |
| DTBench | – | 91.2% |
| CursorBench | – | 60.8% |
| ALE-Bench | – | 1524.5 |
| GDP.pdf | – | 19.0% |
| FrontierSWE | – | 25.9% |
Data as of 2026-09-21. Best configuration of each model; every score links to its source on the model pages.
Grok 4.20 Multi-Agent vs Kimi K3: questions
- Is Grok 4.20 Multi-Agent better than Kimi K3?
- Kimi K3 (max) leads on quality: 67.1 vs 59.2. The BenchLeader Index combines every independent quality benchmark; Kimi K3 (max) is ahead overall as of 2026-09-21, but check the category scores for your use.
- Is Grok 4.20 Multi-Agent better than Kimi K3 for coding?
- Kimi K3 scores higher in coding (67 vs 66 on the category index, where 50 is average).
- Which is cheaper, Grok 4.20 Multi-Agent or Kimi K3?
- Grok 4.20 Multi-Agent is cheaper: $1.56 against $6.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Grok 4.20 Multi-Agent or Kimi K3?
- Grok 4.20 Multi-Agent streams faster: 304 against 43 output tokens per second.
- Which has the larger context window?
- Kimi K3 accepts more context: 1.0M against 1M tokens.