Detailed comparison of capabilities, features, and performance.
| Feature | Kimi K3 | Claude Fable 5 |
|---|---|---|
| AI Lab | Moonshot | Anthropic |
| Context Size | 1,000,000 tokens | 1,000,000 tokens |
| Max Output Size | 131,072 tokens | 128,000 tokens |
| Frontier Model | Yes | Yes |
| Vision Support | Yes | Yes |
| Description | Kimi K3 is Moonshot's most capable flagship model to date, with 2.8 trillion parameters. Built on Kimi Delta Attention (KDA), a hybrid linear attention mechanism, and Attention Residuals, with native visual understanding and a 1M-token context window. It is the world's first open-source model in the 3-trillion-parameter class, designed for frontier intelligence scenarios including long-horizon coding, knowledge work, and reasoning. | Anthropic's most capable widely released model, with a 1M token context window, 128k max output, and always-on adaptive thinking. |
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