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% | 1687elo | 73.1 | 20.7% | 86.6% | 30.1% | 58.0% | 83.5% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 45.2% | 83.2% | 68.7% | 45.0% | 49.5% | 70.7% | 79.2% | 74.3% | 47.0% | 20.6% | 89.5% | 91.3% | - | 16.7% | - | 35.6% | 6.1% | - | 84.7% | 12.13 | - | 83.8% | - | 87.1% | - | - | 89.5% | 100.0% | 37.4 | - | 36.0% | 77.5% | 45.3 | - | 61.8 | - | - | 64.8% |
| Kimi K2.5 Moonshot AI | 68.3% | 1579elo | 74.9 | 27.9% | 87.9% | 30.7% | 70.2% | 78.5% | 72.5% | 77.9% | 61.4% | 57.4% | 77.7% | 84.9% | 76.0% | 39.3% | 76.4% | 66.5% | 49.9% | 49.0% | 67.3% | 70.8% | 74.2% | 34.8% | 17.5% | 95.9% | - | 96.1 | - | 35.0% | - | - | 35.8% | - | - | 95.4 | - | 10421 | - | 62.0% | 87.1 | - | - | - | 63.3% | - | - | - | 73 | - | 69.4 | 26.3% | 59.8% |
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 | open |
| 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 | $2.75 |
| Cache read $/1M | $0.500 | $0.150 |
| 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 Diamond87.9% (AA) Humanity's Last Exam (HLE)30.7% (AA) IFBench70.2% (AA) SciCode49.0% (AA) τ²-bench (Tau²-bench)95.9% (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 18 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 86.6% and Kimi K2.5 scores 87.9% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or Kimi K2.5?
- Kimi K2.5 is cheaper at $2.75 per million output tokens against $25.00 for Claude Opus 4.5 - about 9.1x.
- 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.
Other head-to-heads
56Claude Opus 4.5 vs GPT-5.235 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Opus 4.5 vs GPT-5 Mini31 shared evalsClaude Opus 4.6 vs Kimi K2.531 shared evalsGemini 3.1 Pro Preview vs Kimi K2.530 shared evalsGPT-5.2 vs Kimi K2.529 shared evalsClaude Opus 4.5 vs Grok 4.1 Fast29 shared evalsKimi K2.5 vs Qwen3.6 Plus29 shared evalsClaude Sonnet 4.5 vs Kimi K2.528 shared evalsGPT-5.5 vs Kimi K2.528 shared evalsClaude Opus 4.5 vs Gemini 3.1 Pro Preview28 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsClaude Opus 4.5 vs Claude Opus 4.628 shared evalsClaude Opus 4.5 vs GPT-5.428 shared evalsGPT-5.4 vs Kimi K2.528 shared evalsClaude Opus 4.7 vs Kimi K2.528 shared evalsClaude Opus 4.5 vs DeepSeek V3.227 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Opus 4.5 vs GPT-5 Nano26 shared evalsClaude 4 Sonnet vs Claude Opus 4.526 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsGLM 5.1 vs Kimi K2.526 shared evalsGPT-5 Mini vs Kimi K2.525 shared evalsClaude Opus 4.5 vs GPT-5.525 shared evalsClaude Opus 4.5 vs GLM 4.725 shared evalsClaude Opus 4.5 vs GPT-5.4 Mini25 shared evalsDeepSeek V3.2 vs Kimi K2.525 shared evalsGPT-5.4 Mini vs Kimi K2.525 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.5 vs Claude Opus 4.724 shared evalsClaude Opus 4.5 vs Gemini 2.5 Pro24 shared evalsGrok 4.1 Fast vs Kimi K2.524 shared evalsClaude Opus 4.5 vs GPT-523 shared evalsClaude Fable 5 vs Claude Opus 4.523 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.623 shared evalsClaude Opus 4.5 vs GLM 5.123 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Opus 4.5 vs Qwen3.6 Plus22 shared evalsClaude Opus 4.5 vs gpt-oss-120b21 shared evalsGemini 2.5 Pro vs Kimi K2.521 shared evalsGLM 4.7 vs Kimi K2.520 shared evalsgpt-oss-120b vs Kimi K2.519 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Opus 4.5 vs GPT-4o18 shared evalsClaude Opus 4.5 vs GPT-4.1 Mini16 shared evalsClaude Opus 4.5 vs GPT-4.116 shared evalsClaude Opus 4.5 vs GPT-4o-mini15 shared evalsClaude Opus 4.5 vs GPT-4.1 Nano15 shared evalsGPT-4o vs Kimi K2.515 shared evalsGPT-6 Astra vs Kimi K2.513 shared evalsGPT-4.1 Mini vs Kimi K2.512 shared evalsGPT-4.1 vs Kimi K2.512 shared evalsGPT-4o-mini vs Kimi K2.512 shared evalsGPT-4.1 Nano vs Kimi K2.512 shared evalsClaude Opus 4.5 vs GPT-6 Astra11 shared evals
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