Claude Opus 4.5 vs Kimi K2.5
Head to head on 26 shared benchmarks, with price, context window, and release dates.
Benchmark scores
52evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 61.3% | 1683elo | 73.1 | 20.7% | 81.0% | 13.2% | 43.0% | 83.5% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 45.2% | 83.2% | 68.7% | 45.0% | 47.0% | 70.7% | 79.2% | 74.3% | 40.9% | 20.6% | 86.3% | 62.7% | - | 16.7% | - | 35.6% | 6.1% | - | 84.7% | 12.13 | - | 83.8% | - | 73.8% | - | - | 88.9% | 100.0% | 37.4 | - | 36.0% | 77.5% | 45.3 | - | 61.8 | - | - | 62.2% |
| Kimi K2.5 Moonshot AI | 68.3% | 1576elo | 74.9 | 27.9% | 78.9% | 13.2% | 43.7% | 78.5% | 72.5% | 77.9% | 61.4% | 57.4% | 77.7% | 84.9% | 76.0% | 39.3% | 76.4% | 66.5% | 49.9% | 39.6% | 67.3% | 70.8% | 74.2% | 18.9% | 17.5% | 81.3% | - | 96.1 | - | 39.0% | - | - | 35.8% | - | - | 95.4 | - | 10421 | - | 62.0% | 87.1 | - | - | - | 63.3% | - | - | - | 73 | - | 69.4 | 26.3% | 56.8% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | Kimi K2.5 Moonshot AI |
|---|---|---|
| Description | Claude Opus 4.5 is an AI model from Anthropic. | Kimi K2.5 is an AI model from Kimi. |
| Family | Claude | Kimi |
| Params | - | - |
| Open weights | closed | closed |
| License | proprietary | Modified MIT |
| Released | 24 Nov 2025 | 27 Jan 2026 |
| Context | 200,000 | 262,144 |
| Input $/1M | $5.00 | $0.60 |
| Output $/1M | $25.00 | $3.00 |
| Cache read $/1M | $0.500 | $0.100 |
| Cache write $/1M | $6.250 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | text, image |
| Providers | - | - |
| Publisher | Anthropic | 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 Claude Opus 4.5 or Kimi K2.5 better?
- Across the 26 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 20 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.5 and Kimi K2.5 compare on GPQA Diamond?
- Claude Opus 4.5 scores 81.0% and Kimi K2.5 scores 78.9% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or Kimi K2.5?
- Kimi K2.5 is cheaper at $3.00 per million output tokens against $25.00 for Claude Opus 4.5 - about 8.3x.
- When were Claude Opus 4.5 and Kimi K2.5 released?
- Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.
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