Claude Opus 4.8 vs Kimi K2.5
Head to head on 28 shared benchmarks, with price, context window, and release dates.
Benchmark scores
51evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.8 Anthropic | 66.7% | 62.0% | 1840elo | 80.8 | 53.9% | 47.2% | 92.0% | 48.7% | 62.2% | 80.1% | 79.3% | 78.3% | 67.4% | 81.4% | 84.3% | 89.7% | 91.8% | 53.2% | 85.8% | 69.9% | 83.4% | 54.8% | 53.5% | 75.6% | 58.3% | 55.1% | 82.7% | 94.4% | - | 15.5% | 80.4% | 14.5% | 1281elo | 40.0% | 13.4% | 22.5% | 1890elo | 56.9% | - | - | - | 10.4% | - | 69.0% | - | - | - | 69.2% | 82.7% | - | 70.9% | 63.1% |
| Kimi K2.5 Moonshot AI | 68.3% | 35.0% | 1579elo | 74.9 | 35.8% | 27.9% | 87.9% | 30.7% | 70.2% | 72.5% | 77.9% | 61.4% | 57.4% | 77.7% | 84.9% | 76.0% | 62.0% | 39.3% | 76.4% | 66.5% | 63.3% | 49.9% | 49.0% | 74.2% | 34.8% | 26.3% | 17.5% | 95.9% | 96.1 | - | - | - | - | - | - | - | - | - | 95.4 | 78.5% | 10421 | - | 87.1 | - | 73 | 67.3% | 70.8% | - | - | 69.4 | - | 59.8% |
2 / 2 models
| Attribute | Claude Opus 4.8 Anthropic | Kimi K2.5 Moonshot AI |
|---|---|---|
| Description | Claude Opus 4.8 (Adaptive Reasoning, Max Effort) is an AI model from Anthropic. | Kimi K2.5 is an AI model from Kimi. |
| Family | Claude | Kimi |
| Params | - | - |
| Open weights | - | open |
| License | - | Modified MIT |
| Released | 28 May 2026 | 27 Jan 2026 |
| Context | 1,000,000 | 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 | text, image, file | 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 4.8 or Kimi K2.5 better?
- Across the 28 benchmarks both models report on Sophon, Claude Opus 4.8 leads on 24 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.8 and Kimi K2.5 compare on GPQA Diamond?
- Claude Opus 4.8 scores 92.0% and Kimi K2.5 scores 87.9% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.8 or Kimi K2.5?
- Kimi K2.5 is cheaper at $2.75 per million output tokens against $25.00 for Claude Opus 4.8 - about 9.1x.
- When were Claude Opus 4.8 and Kimi K2.5 released?
- Claude Opus 4.8 was released 28 May 2026 by Anthropic. Kimi K2.5 was released 27 Jan 2026 by Moonshot AI.
Other head-to-heads
56Claude Opus 4.8 vs GPT-5.541 shared evalsClaude Fable 5 vs Claude Opus 4.840 shared evalsClaude Opus 4.8 vs Gemini 3.1 Pro Preview38 shared evalsClaude Opus 4.6 vs Kimi K2.531 shared evalsGemini 3.1 Pro Preview vs Kimi K2.530 shared evalsClaude Opus 4.7 vs Claude Opus 4.830 shared evalsGPT-5.2 vs Kimi K2.529 shared evalsClaude Opus 4.8 vs Claude Sonnet 4.629 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 4.6 vs Claude Opus 4.828 shared evalsClaude Opus 4.8 vs GPT-5.428 shared evalsGPT-5.4 vs Kimi K2.528 shared evalsClaude Opus 4.7 vs Kimi K2.528 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Sonnet 4.6 vs Kimi K2.527 shared evalsClaude Opus 4.8 vs GPT-5.226 shared evalsClaude Opus 4.8 vs GPT-5.4 Mini26 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 evalsGPT-5 Mini vs Kimi K2.525 shared evalsClaude Opus 4.8 vs Qwen3.6 Plus25 shared evalsDeepSeek V3.2 vs Kimi K2.525 shared evalsGPT-5.4 Mini vs Kimi K2.525 shared evalsClaude Opus 4.8 vs GPT-5 Mini24 shared evalsClaude Opus 4.5 vs Claude Opus 4.824 shared evalsClaude Opus 4.8 vs Grok 4.1 Fast24 shared evalsGrok 4.1 Fast vs Kimi K2.524 shared evalsClaude 4 Sonnet vs Kimi K2.523 shared evalsClaude Opus 4.8 vs GPT-5 Nano22 shared evalsGPT-5 Nano vs Kimi K2.522 shared evalsClaude 4 Sonnet vs Claude Opus 4.822 shared evalsClaude Opus 4.8 vs DeepSeek V3.222 shared evalsClaude Opus 4.8 vs GLM 4.721 shared evalsGemini 2.5 Pro vs Kimi K2.521 shared evalsClaude Opus 4.8 vs Gemini 2.5 Pro20 shared evalsGLM 4.7 vs Kimi K2.520 shared evalsClaude Opus 4.8 vs GPT-6 Astra19 shared evalsgpt-oss-120b vs Kimi K2.519 shared evalsGPT-5 vs Kimi K2.518 shared evalsClaude Opus 4.8 vs gpt-oss-120b18 shared evalsClaude Opus 4.8 vs GPT-517 shared evalsGPT-4o vs Kimi K2.515 shared evalsClaude Opus 4.8 vs GPT-4o14 shared evalsGPT-6 Astra vs Kimi K2.513 shared evalsGPT-4.1 Mini vs Kimi K2.512 shared evalsClaude Opus 4.8 vs GPT-4o-mini12 shared evalsClaude Opus 4.8 vs GPT-4.1 Nano12 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 4.8 vs GPT-4.1 Mini11 shared evalsClaude Opus 4.8 vs GPT-4.111 shared evals
Comparing something else? Build your own side-by-side.