Claude Fable 5.5 (Leaked Checkpoint) vs Xiaomi MiMo-V2.6 Flash
A direct, empirical evaluation of Claude Fable 5.5 (Leaked Checkpoint) (Anthropic) against Xiaomi MiMo-V2.6 Flash (Xiaomi AI Lab).
Claude Fable 5.5 (Leaked Checkpoint)
Developed by Anthropic · Proprietary Frontier Dynamic Reasoner parameters
Terminal-Bench 4.0 autonomous shell execution (78.5% target), recursive self-critique, and 1.5M-token repository refactoring.
Xiaomi MiMo-V2.6 Flash
Developed by Xiaomi AI Lab · 185 Billion (Sparse MoE) parameters
Low-latency agent loops, high-volume classification, and developer code completion.
| Metric | Claude Fable 5.5 (Leaked Checkpoint) | Xiaomi MiMo-V2.6 Flash |
|---|---|---|
| SWE-bench Verified | 84.2% | 64.2% |
| MMLU-Pro | 94.6% | 82.4% |
| MATH-500 | 98.4% | 89.5% |
| Context Window | 1,500,000 tokens | 128,000 tokens |
| Input Pricing (per 1M) | $3.50 | $0.04 |
| Output Pricing (per 1M) | $17.50 | $0.08 |