GPT-5 vs Kimi K2.5
Head to head on 18 shared benchmarks, with price, context window, and release dates.
Benchmark scores
81evals · sort by any column, ⤢ to expand fullscreen
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| Kimi K2.5 Moonshot AI | 68.3% | 1576elo | 74.9 | 27.9% | 78.9% | 13.2% | 43.7% | 78.5% | 39.3% | 76.4% | 66.5% | 49.9% | 39.6% | 70.8% | 74.2% | 18.9% | 17.5% | 81.3% | - | - | - | - | - | 96.1 | - | - | - | - | - | 39.0% | - | - | - | 35.8% | - | - | - | - | - | 95.4 | - | 10421 | - | 72.5% | 77.9% | 61.4% | 57.4% | 77.7% | 84.9% | 76.0% | - | - | - | - | - | - | 62.0% | - | - | - | - | - | 87.1 | - | - | - | - | 63.3% | - | - | 73 | - | 67.3% | - | 69.4 | - | - | 26.3% | - | - | - | 56.8% |
| GPT-5 OpenAI | 61.1% | 1623elo | 72.8 | 32.4% | 68.6% | 6.6% | 45.0% | 83.4% | 49.6% | 83.7% | 65.5% | 43.7% | 37.8% | 74.4% | 73.4% | 12.9% | 20.1% | 0.0% | 46.7% | 91.1% | 88.0% | 94.6% | 48.3% | - | 0.0% | 0.15 | 0.0% | 68.1% | 4.58 | - | 57.7% | 80.0% | 80.0% | - | 91.7% | 0.0% | 88.9% | 83.3% | 100.0% | - | 48.9% | - | 58.2% | - | - | - | - | - | - | - | 54.3% | 37.5% | 0.52 | 1.62 | 100.0% | 86.1% | - | 0.0% | 92.7% | 92.7% | 93.3% | 10.0% | - | 82.0% | 0.0% | 60.0% | 0.26 | - | 0.0% | 18.0% | - | 74.9% | - | 2.34 | - | 87.5% | 0.86 | - | 54.8% | 90.0% | 90.0% | 56.7% |
2 / 2 models
| Attribute | GPT-5 OpenAI | Kimi K2.5 Moonshot AI |
|---|---|---|
| Description | OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant. | Kimi K2.5 is an AI model from Kimi. |
| Family | GPT 5 | Kimi |
| Params | Undisclosed (closed) | - |
| Open weights | closed | closed |
| License | Proprietary | Modified MIT |
| Released | 7 Aug 2025 | 27 Jan 2026 |
| Context | 400,000 | 262,144 |
| Input $/1M | - | $0.60 |
| Output $/1M | - | $3.00 |
| Cache read $/1M | $0.125 | $0.100 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image |
| Providers | openai | - |
| Publisher | OpenAI | Moonshot AI |
| Reported scores | GPQA Diamond78.9% (AA) Humanity's Last Exam (HLE)13.2% (AA) IFBench43.7% (AA) SciCode39.6% (AA) τ²-bench (Tau²-bench)81.3% (AA) |
FAQ
- Is GPT-5 or Kimi K2.5 better?
- Across the 18 benchmarks both models report on Sophon, Kimi K2.5 leads on 10 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do GPT-5 and Kimi K2.5 compare on GPQA Diamond?
- GPT-5 scores 68.6% and Kimi K2.5 scores 78.9% on GPQA Diamond.
- When were GPT-5 and Kimi K2.5 released?
- GPT-5 was released 7 Aug 2025 by OpenAI. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.
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