Kimi K2.6 vs o3
Kimi K2.6 
o3 Verdict
- Kimi K2.6 and o3 are level on quality (60.7 vs 61.6).
- Kimi K2.6 is stronger in composite, instruction following, knowledge, long context, multimodal, reasoning.
- o3 is stronger in agents & tools, coding, human preference, maths.
- Kimi K2.6 is 2.0× cheaper ($1.71 vs $3.50 per 1M blended).
- o3 streams 2.6× faster (107 vs 42 tokens per second).
| Metric | Kimi K2.6 | o3 |
|---|---|---|
| BenchLeader Index | 60.7 | 61.6 |
| Agents & tools score | 45.1 | 70.3 |
| Coding score | 60.3 | 62.0 |
| Composite score | 68.6 | 54.5 |
| Human preference score | 60.7 | 62.3 |
| Instruction following score | 73.7 | 65.0 |
| Knowledge score | 58.6 | 58.0 |
| Long context score | 67.1 | 63.8 |
| Maths score | 53.8 | 78.6 |
| Multimodal score | 63.7 | 57.9 |
| Reasoning score | 66.0 | 61.5 |
| Blended price $/M | $1.71 | $3.50 |
| Output speed | 42 tok/s | 107 tok/s |
| Time to first answer | 109.5 s | 6.3 s |
| Context window | 262k | 200k |
| GPQA Diamond | 90.8% | – |
| FrontierMath Tiers 1–3 | 57.2% | – |
| FrontierMath Tier 4 | 25.6% | – |
| OTIS Mock AIME | 96.1% | – |
| SWE-bench Verified (Epoch) | 76.7% | – |
| SimpleQA Verified | 34.9% | – |
| OSWorld-Verified 2.0 | 4.6% | – |
| SciCode | 53.5% | – |
| WeirdML | 55.9% | – |
| APEX-Agents | 18.9% | – |
| ProofBench | 16.0% | – |
| Epoch Capabilities Index | 151.0 | 146.9 |
| LMArena Text | 1461 | 1432 |
| LMArena Hard Prompts | 1485 | 1441 |
| LMArena Coding | 1514 | 1460 |
| LMArena WebDev | 1509 | – |
| LMArena Vision | 1281 | 1214 |
| AA Intelligence Index | 31.3 | 20.2 |
| IFBench | 76.0% | 71.4% |
| AA-LCR | 81.0% | 74.7% |
| MMMU-Pro | 79.4% | 70.1% |
| AA-Omniscience | 5.3 | -15.6 |
| Terminal-Bench Hard | 43.9% | 37.1% |
| GPQA Diamond (AA) | 91.1% | 82.7% |
| Humanity's Last Exam (AA) | 37.5% | 20.1% |
| SciCode (AA) | 51.5% | – |
| τ²-Bench Telecom (AA) | 95.9% | 80.7% |
| LiveCodeBench | 86.8% | – |
| MMLU-Pro | 87.6% | – |
| LegalBench | 84.7% | – |
| CorpFin | 66.7% | – |
| TaxEval | 74.7% | – |
| Terminal-Bench 2.1 (Vals) | 53.6% | – |
| SWE-bench (Vals) | 76.2% | – |
| GPQA Diamond (Vals) | 89.1% | – |
| Vals Index | 43.5 | – |
| PRBench Finance | – | 47.7% |
| PRBench Legal | – | 48.6% |
| HiL-Bench | 18.7% | – |
| EQ-Bench 4 | 1202 | – |
| MMMU (validation) | – | 82.9% |
| MMMU-Pro (official) | – | 76.4% |
| Kagi LLM Benchmark | – | 67.6% |
| IFEval (HELM) | – | 86.9% |
| Omni-MATH (HELM) | – | 71.4% |
| WildBench (HELM) | – | 86.1% |
| MMLU-Pro (HELM) | – | 85.9% |
| GPQA Diamond (HELM) | – | 75.3% |
| HELM Capabilities mean | – | 81.1% |
| Aider Polyglot | – | 81.3% |
| SWE-bench Verified (bash only) | – | 58.4% |
| SWE-bench Verified (any scaffold) | – | 58.4% |
| 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.
Kimi K2.6 vs o3: questions
- Is Kimi K2.6 better than o3?
- Kimi K2.6 and o3 are level on quality (60.7 vs 61.6). The BenchLeader Index combines every independent quality benchmark; o3 is ahead overall as of 2026-09-12, but check the category scores for your use.
- Is Kimi K2.6 better than o3 for coding?
- o3 scores higher in coding (62 vs 60 on the category index, where 50 is average).
- Is Kimi K2.6 better than o3 for agentic tasks?
- o3 scores higher in agentic tasks (70 vs 45 on the category index, where 50 is average).
- Which is cheaper, Kimi K2.6 or o3?
- Kimi K2.6 is cheaper: $1.71 against $3.50 per million tokens, blended at three input tokens per output token.
- Which is faster, Kimi K2.6 or o3?
- o3 streams faster: 107 against 42 output tokens per second.
- Which has the larger context window?
- Kimi K2.6 accepts more context: 262k against 200k tokens.