Claude Fable 5.5 (Leaked Checkpoint) vs Xiaomi MiMo-V2.6 Pro
A direct, empirical evaluation of Claude Fable 5.5 (Leaked Checkpoint) (Anthropic) against Xiaomi MiMo-V2.6 Pro (Xiaomi AI Lab (Fuli Luo)).
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 Pro
Developed by Xiaomi AI Lab (Fuli Luo) · 1.02 Trillion (Sparse MoE) parameters
High-accuracy autonomous coding (71.9% DeepSWE), cybersecurity defense (94.0% CyberGym), multimodal document reasoning, and cost-effective agentic workflows.
| Metric | Claude Fable 5.5 (Leaked Checkpoint) | Xiaomi MiMo-V2.6 Pro |
|---|---|---|
| SWE-bench Verified | 84.2% | 71.9% |
| MMLU-Pro | 94.6% | 89.2% |
| MATH-500 | 98.4% | 93.8% |
| Context Window | 1,500,000 tokens | 128,000 tokens |
| Input Pricing (per 1M) | $3.50 | $0.10 |
| Output Pricing (per 1M) | $17.50 | $0.20 |