Claude Sonnet 4.5 vs Kimi K2.5
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
91evals · sort by any column, ⤢ to expand fullscreen
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| Kimi K2.5 Moonshot AI | 96.1 | 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% | 63.3% | 49.9% | 49.0% | 67.3% | 70.8% | 74.2% | 34.8% | 17.5% | 95.9% | - | - | - | - | - | - | - | - | - | - | 35.0% | - | - | - | - | 35.8% | - | - | - | - | - | - | - | - | 95.4 | - | 10421 | - | - | - | - | - | - | 62.0% | - | - | 87.1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 73 | - | - | - | - | - | 69.4 | - | 26.3% | - | - | 59.8% |
| Claude Sonnet 4.5 Anthropic | 100 | 60.8% | 1678elo | 71.4 | 15.2% | 83.4% | 17.8% | 57.3% | 83.8% | 70.7% | 80.4% | 57.0% | 53.4% | 76.5% | 79.3% | 77.6% | 40.6% | 84.5% | 64.0% | 62.9% | 32.9% | 45.7% | 67.0% | 74.8% | 73.3% | 35.6% | 22.6% | 78.1% | 0.0% | 0.0% | 88.0% | 0.0% | 0.0% | 0.0% | 5.0% | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 0.0% | 0.0% | - | 0.0% | 0.0% | 83.9% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | - | 87.5% | - | 0.0% | 0.0% | 71.4% | 0.75 | 0.75 | 0.0% | - | 0 | 0 | - | 87.5% | 0.0% | 0.0% | 0.0% | 0.0% | 19.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0 | 0.0% | 0.0% | - | 77.2% | 0.0% | 0 | 0 | 50.34 | - | 0 | - | 0.0% | 1.49 | 29.2% |
2 / 2 models
| Attribute | Claude Sonnet 4.5 Anthropic | Kimi K2.5 Moonshot AI |
|---|---|---|
| Description | anthropic/claude-sonnet-4.5 is an AI model. | Kimi K2.5 is an AI model from Kimi. |
| Family | Claude | Kimi |
| Params | Undisclosed (closed) | - |
| Open weights | closed | open |
| License | proprietary | Modified MIT |
| Released | 29 Sep 2025 | 27 Jan 2026 |
| Context | 1,000,000 | 262,144 |
| Input $/1M | $3.00 | $0.60 |
| Output $/1M | $15.00 | $2.75 |
| Cache read $/1M | $0.300 | $0.070 |
| Cache write $/1M | $3.750 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image, file | text, image |
| Providers | anthropic, aws-bedrock, vertex-ai | - |
| Publisher | Anthropic | Moonshot AI |
| Reported scores | TaxEval v273.3% LiveBench - Math79.3% (LiveBench) LiveBench - Coding80.4% (LiveBench) LiveBench - Language76.5% (LiveBench) LiveBench - Data Analysis57.0% (LiveBench) | 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 Sonnet 4.5 or Kimi K2.5 better?
- Across the 28 benchmarks both models report on Sophon, Kimi K2.5 leads on 18 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Sonnet 4.5 and Kimi K2.5 compare on GPQA Diamond?
- Claude Sonnet 4.5 scores 83.4% and Kimi K2.5 scores 87.9% on GPQA Diamond.
- Which is cheaper, Claude Sonnet 4.5 or Kimi K2.5?
- Kimi K2.5 is cheaper at $2.75 per million output tokens against $15.00 for Claude Sonnet 4.5 - about 5.5x.
- When were Claude Sonnet 4.5 and Kimi K2.5 released?
- Claude Sonnet 4.5 was released 29 Sep 2025 by Anthropic. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.
Other head-to-heads
56Claude Sonnet 4.5 vs GPT-4.1 Mini35 shared evalsClaude Opus 4.5 vs Claude Sonnet 4.534 shared evalsClaude Sonnet 4.5 vs GPT-5.232 shared evalsClaude Sonnet 4.5 vs GPT-5 Mini31 shared evalsClaude Sonnet 4.5 vs GPT-531 shared evalsClaude Sonnet 4.5 vs GPT-5 Nano31 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 evalsKimi K2.5 vs Qwen3.6 Plus29 shared evalsClaude 4 Sonnet vs Claude Sonnet 4.528 shared evalsClaude Opus 4.6 vs Claude Sonnet 4.528 shared evalsClaude Sonnet 4.5 vs Grok 4.1 Fast28 shared evalsGPT-5.5 vs Kimi K2.528 shared evalsClaude Opus 4.8 vs Kimi K2.528 shared evalsGPT-5.4 vs Kimi K2.528 shared evalsClaude Opus 4.7 vs Kimi K2.528 shared evalsClaude Sonnet 4.5 vs Gemini 3.1 Pro Preview27 shared evalsClaude Sonnet 4.5 vs DeepSeek V3.227 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Sonnet 4.5 vs GPT-5.526 shared evalsClaude Sonnet 4.5 vs GPT-5.426 shared evalsClaude Sonnet 4.5 vs Gemini 2.5 Pro26 shared evalsClaude Opus 4.5 vs Kimi K2.526 shared evalsClaude Fable 5 vs Kimi K2.526 shared evalsGLM 5.1 vs Kimi K2.526 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.525 shared evalsClaude Sonnet 4.5 vs GLM 4.725 shared evalsGPT-5 Mini vs Kimi K2.525 shared evalsDeepSeek V3.2 vs Kimi K2.525 shared evalsGPT-5.4 Mini vs Kimi K2.525 shared evalsClaude Fable 5 vs Claude Sonnet 4.524 shared evalsClaude Sonnet 4.5 vs Claude Sonnet 4.624 shared evalsClaude Opus 4.7 vs Claude Sonnet 4.524 shared evalsGrok 4.1 Fast vs Kimi K2.524 shared evalsClaude Sonnet 4.5 vs GLM 5.123 shared evalsClaude Sonnet 4.5 vs gpt-oss-120b23 shared evalsClaude Sonnet 4.5 vs GPT-5.4 Mini23 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsClaude Sonnet 4.5 vs Qwen3.6 Plus22 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude Sonnet 4.5 vs GPT-4o21 shared evalsGemini 2.5 Pro vs Kimi K2.521 shared evalsGLM 4.7 vs Kimi K2.520 shared evalsClaude Sonnet 4.5 vs GPT-4.119 shared evalsgpt-oss-120b vs Kimi K2.519 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Sonnet 4.5 vs GPT-4o-mini17 shared evalsClaude Sonnet 4.5 vs GPT-4.1 Nano16 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 Sonnet 4.5 vs GPT-6 Astra11 shared evals
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