GPT-5 vs Kimi K2.6
GPT-5 
Kimi K2.6 Verdict
- GPT-5 and Kimi K2.6 are level on quality (60.8 vs 60.7).
- GPT-5 is stronger in agents & tools, coding, human preference, knowledge, maths.
- Kimi K2.6 is stronger in composite, instruction following, long context, multimodal, reasoning.
- Kimi K2.6 is 2.0× cheaper ($1.71 vs $3.44 per 1M blended).
- GPT-5 streams 2.0× faster (85 vs 42 tokens per second).
| Metric | GPT-5 | Kimi K2.6 |
|---|---|---|
| BenchLeader Index | 60.8 | 60.7 |
| Agents & tools score | 51.0 | 45.1 |
| Coding score | 60.9 | 60.3 |
| Composite score | 58.1 | 68.6 |
| Human preference score | 61.7 | 60.7 |
| Instruction following score | 65.0 | 73.7 |
| Knowledge score | 62.2 | 58.6 |
| Long context score | 65.6 | 67.1 |
| Maths score | 72.8 | 53.8 |
| Multimodal score | 59.6 | 63.7 |
| Reasoning score | 64.2 | 66.0 |
| Blended price $/M | $3.44 | $1.71 |
| Output speed | 85 tok/s | 42 tok/s |
| Time to first answer | 60.7 s | 109.5 s |
| Context window | 400k | 262k |
| 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% |
| Terminal-Bench | 49.6% | – |
| OSWorld-Verified 2.0 | – | 4.6% |
| SciCode | 42.9% | 53.5% |
| Remote Labor Index | 1.7% | – |
| WeirdML | 39.8% | 55.9% |
| APEX-Agents | 18.3% | 18.9% |
| ProofBench | – | 16.0% |
| Epoch Capabilities Index | 150 | 151.0 |
| LMArena Text | 1427 | 1461 |
| LMArena Hard Prompts | 1449 | 1485 |
| LMArena Coding | 1462 | 1514 |
| LMArena WebDev | – | 1509 |
| LMArena Vision | 1232 | 1281 |
| AA Intelligence Index | 23.0 | 31.3 |
| IFBench | 73.1% | 76.0% |
| AA-LCR | 78.2% | 81.0% |
| MMMU-Pro | 74.2% | 79.4% |
| AA-Omniscience | -8.7 | 5.3 |
| Terminal-Bench Hard | 32.6% | 43.9% |
| GPQA Diamond (AA) | 85.3% | 91.1% |
| Humanity's Last Exam (AA) | 28.5% | 37.5% |
| SciCode (AA) | – | 51.5% |
| τ²-Bench Telecom (AA) | 84.8% | 95.9% |
| 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 | 51.3% | – |
| PRBench Legal | 49.0% | – |
| VISTA | 49.7% | – |
| MultiNRC | 52.1% | – |
| HiL-Bench | – | 18.7% |
| TutorBench | 55.3% | – |
| EQ-Bench 4 | – | 1202 |
| Kagi LLM Benchmark | 72.7% | – |
| IFEval (HELM) | 87.5% | – |
| Omni-MATH (HELM) | 64.7% | – |
| WildBench (HELM) | 85.7% | – |
| MMLU-Pro (HELM) | 86.3% | – |
| GPQA Diamond (HELM) | 79.1% | – |
| HELM Capabilities mean | 80.7% | – |
| Aider Polyglot | 88.0% | – |
| SWE-bench Verified (any scaffold) | 75.6% | – |
Data as of 2026-09-12. Best configuration of each model; every score links to its source on the model pages.
GPT-5 vs Kimi K2.6: questions
- Is GPT-5 better than Kimi K2.6?
- GPT-5 and Kimi K2.6 are level on quality (60.8 vs 60.7). The BenchLeader Index combines every independent quality benchmark; GPT-5 is ahead overall as of 2026-09-12, but check the category scores for your use.
- Is GPT-5 better than Kimi K2.6 for coding?
- GPT-5 scores higher in coding (61 vs 60 on the category index, where 50 is average).
- Is GPT-5 better than Kimi K2.6 for agentic tasks?
- GPT-5 scores higher in agentic tasks (51 vs 45 on the category index, where 50 is average).
- Which is cheaper, GPT-5 or Kimi K2.6?
- Kimi K2.6 is cheaper: $1.71 against $3.44 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5 or Kimi K2.6?
- GPT-5 streams faster: 85 against 42 output tokens per second.
- Which has the larger context window?
- GPT-5 accepts more context: 400k against 262k tokens.