Claude Fable 5.1 vs Kimi K3
Claude Fable 5.1 (Anthropic) and Kimi K3 (Moonshot AI) compared on price, context window, speed and independent benchmarks. Claude Fable 5.1 scores higher on the Artificial Analysis Intelligence Index (65.7 vs 59.7), while Kimi K3 is 3.3× cheaper on a blended basis. Pick Claude Fable 5.1 for the hardest tasks and Kimi K3 when cost dominates.
| Claude Fable 5.1 | Kimi K3 | |
|---|---|---|
| Provider | Anthropic | Moonshot AI |
| Input $/1M | $10.0 | $3.00 |
| Output $/1M | $50.0 | $15.0 |
| Blended $/1M (3:1) | $20.0 | $6.00 |
| Cached input $/1M | $0.25 | $0.30 |
| Context window | 1M | 1.0M |
| Knowledge cutoff | 2026-06 | — |
| License | proprietary | open weights |
| Speed (tok/s) | 71 | 38 |
| Artificial Analysis Intelligence Index | 65.7 | 59.7 |
| LMArena Elo | — | 1476 |
| GPQA Diamond | 93.7% | 93.5% |
| SWE-bench Verified | — | 93.4% |
| Humanity's Last Exam | 59.1% | 46.9% |
| MMMU | — | 81.6% |