Qwen 2.5 Max vs Union Alpha (Stealth)
A direct, empirical evaluation of Qwen 2.5 Max (Alibaba Cloud) against Union Alpha (Stealth) (OpenRouter & OpenCode).
Qwen 2.5 Max
Developed by Alibaba Cloud · Proprietary (~700B) parameters
Cross-lingual document extraction and structured structured output generation.
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 | Qwen 2.5 Max | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 51.4% | 74.2% |
| MMLU-Pro | 77.2% | 89.8% |
| MATH-500 | 89.4% | 95.4% |
| Context Window | 128,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $1.60 | $0.00 |
| Output Pricing (per 1M) | $6.40 | $0.00 |