GPT-5 Pro vs Kimi K3
GPT-5 Pro 
Kimi K3 Verdict
- Kimi K3 leads on quality: 66.5 vs 60.8.
- GPT-5 Pro is stronger in multimodal, reasoning.
- Kimi K3 is stronger in knowledge, agents & tools, coding, composite, human preference, long context, maths.
- Kimi K3 is 6.9× cheaper ($6.00 vs $41.25 per 1M blended).
| Metric | GPT-5 Pro | Kimi K3 |
|---|---|---|
| BenchLeader Index | 60.8 | 66.5 |
| Knowledge score | 68.0 | 68.2 |
| Multimodal score | 67.4 | 65.0 |
| Reasoning score | 57.6 | – |
| Agents & tools score | – | 67.4 |
| Coding score | – | 65.0 |
| Composite score | – | 74.2 |
| Human preference score | – | 71.2 |
| Long context score | – | 71.1 |
| Maths score | – | 78.1 |
| Blended price $/M | $41.25 | $6.00 |
| Output speed | – | 38 tok/s |
| Time to first answer | – | 56.3 s |
| Context window | 400k | 1.0M |
| Humanity's Last Exam | 31.6% | – |
| SimpleBench | 61.6% | – |
| SciCode | – | 58.7% |
| APEX-Agents | – | 39.3% |
| FrontierCode | – | 44.2% |
| ProofBench | – | 87.0% |
| Epoch Capabilities Index | 150.3 | 157.6 |
| 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% |
| LegalBench | – | 86.0% |
| CorpFin | – | 71.6% |
| TaxEval | – | 75.7% |
| Terminal-Bench 2.1 (Vals) | – | 80.9% |
| SWE-bench (Vals) | – | 93.4% |
| GPQA Diamond (Vals) | – | 92.9% |
| Vals Index | – | 57.8 |
| PRBench Finance | 51.1% | – |
| PRBench Legal | 49.9% | – |
| VISTA | 52.4% | – |
| MultiNRC | 65.2% | – |
| EQ-Bench 4 | – | 1339 |
| Kagi LLM Benchmark | 76.8% | – |
| ARC-AGI-1 | 70.2% | – |
| ARC-AGI-2 | 18.3% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GPT-5 Pro vs Kimi K3: questions
- Is GPT-5 Pro better than Kimi K3?
- Kimi K3 leads on quality: 66.5 vs 60.8. The BenchLeader Index combines every independent quality benchmark; Kimi K3 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Which is cheaper, GPT-5 Pro or Kimi K3?
- Kimi K3 is cheaper: $6.00 against $41.25 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Kimi K3 accepts more context: 1.0M against 400k tokens.