Detailed comparison of capabilities, features, and performance.
| Feature | Kimi K2 (thinking) | Claude 4.5 Sonnet |
|---|---|---|
| AI Lab | Moonshot | Anthropic |
| Context Size | 256,000 tokens | 1,000,000 tokens |
| Max Output Size | 16,384 tokens | 64,000 tokens |
| Frontier Model | No | Yes |
| Vision Support | No | Yes |
| Description | Kimi K2 thinking is the latest, most capable version of open-source thinking model. Starting with Kimi K2, it was built as a thinking agent that reasons step-by-step while dynamically invoking tools. | The latest Claude 4.5 Sonnet model from Anthropic with a 1M token context window. |
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