Xiaomi MiMo-V2.6 Pro vs Union Alpha (Stealth)
A direct, empirical evaluation of Xiaomi MiMo-V2.6 Pro (Xiaomi AI Lab (Fuli Luo)) against Union Alpha (Stealth) (OpenRouter & OpenCode).
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.
Union Alpha (Stealth)
Developed by OpenRouter & OpenCode · Multi-Model Ensemble Mixture parameters
Terminal coding agents, pull-request synthesis, multi-model consensus verification, and zero-cost autonomous refactoring.
| Metric | Xiaomi MiMo-V2.6 Pro | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 71.9% | 74.2% |
| MMLU-Pro | 89.2% | 89.8% |
| MATH-500 | 93.8% | 95.4% |
| Context Window | 128,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $0.10 | $0.00 |
| Output Pricing (per 1M) | $0.20 | $0.00 |