GPT-5.4 Pro vs Kimi K2.6
GPT-5.4 Pro 
Kimi K2.6 Verdict
- GPT-5.4 Pro leads on quality: 64.3 vs 60.7.
- GPT-5.4 Pro is stronger in knowledge, multimodal, reasoning.
- Kimi K2.6 is stronger in instruction following, agents & tools, coding, composite, human preference, long context, maths.
- Kimi K2.6 is 39× cheaper ($1.71 vs $67.50 per 1M blended).
- Kimi K2.6 streams 44.4× faster (44 vs 1 tokens per second).
| Metric | GPT-5.4 Pro | Kimi K2.6 |
|---|---|---|
| BenchLeader Index | 64.3 | 60.7 |
| Instruction following score | 67.3 | 73.7 |
| Knowledge score | 73.6 | 58.6 |
| Multimodal score | 69.8 | 63.7 |
| Reasoning score | 75.3 | 66.0 |
| Agents & tools score | – | 45.1 |
| Coding score | – | 60.4 |
| Composite score | – | 68.6 |
| Human preference score | – | 60.8 |
| Long context score | – | 67.1 |
| Maths score | – | 53.8 |
| Blended price $/M | $67.50 | $1.71 |
| Output speed | 1 tok/s | 44 tok/s |
| Time to first answer | 6.5 s | 103.2 s |
| Context window | 1.1M | 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% |
| Humanity's Last Exam | 44.3% | – |
| SimpleBench | 74.1% | – |
| OSWorld-Verified 2.0 | – | 4.6% |
| SciCode | – | 53.5% |
| WeirdML | – | 55.9% |
| APEX-Agents | – | 18.9% |
| ProofBench | – | 16.0% |
| Epoch Capabilities Index | 158.9 | 151.0 |
| LMArena Text | – | 1461 |
| LMArena Hard Prompts | – | 1485 |
| LMArena Coding | – | 1514 |
| LMArena WebDev | – | 1509 |
| LMArena Vision | – | 1281 |
| AA Intelligence Index | – | 31.3 |
| IFBench | – | 76.0% |
| AA-LCR | – | 81.0% |
| MMMU-Pro | – | 79.4% |
| AA-Omniscience | – | 5.3 |
| Terminal-Bench Hard | – | 43.9% |
| GPQA Diamond (AA) | – | 91.1% |
| Humanity's Last Exam (AA) | – | 37.5% |
| SciCode (AA) | – | 51.5% |
| τ²-Bench Telecom (AA) | – | 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 |
| MultiChallenge | 69.2% | – |
| VISTA | 53.9% | – |
| MultiNRC | 62.3% | – |
| HiL-Bench | – | 18.7% |
| TutorBench | 56.6% | – |
| EQ-Bench 4 | – | 1202 |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5.4 Pro vs Kimi K2.6: questions
- Is GPT-5.4 Pro better than Kimi K2.6?
- GPT-5.4 Pro leads on quality: 64.3 vs 60.7. The BenchLeader Index combines every independent quality benchmark; GPT-5.4 Pro is ahead overall as of 2026-09-10, but check the category scores for your use.
- Which is cheaper, GPT-5.4 Pro or Kimi K2.6?
- Kimi K2.6 is cheaper: $1.71 against $67.50 per million tokens, blended at three input tokens per output token.
- Which is faster, GPT-5.4 Pro or Kimi K2.6?
- Kimi K2.6 streams faster: 44 against 1 output tokens per second.
- Which has the larger context window?
- GPT-5.4 Pro accepts more context: 1.1M against 262k tokens.