DeepSeek V5 (Leaked Staging) vs Union Alpha (Stealth)
A direct, empirical evaluation of DeepSeek V5 (Leaked Staging) (DeepSeek AI) against Union Alpha (Stealth) (OpenRouter & OpenCode).
DeepSeek V5 (Leaked Staging)
Developed by DeepSeek AI · 1.8 Trillion (Sparse MoE) parameters
Autonomous coding agents scoring 81.4% on SWE-bench Verified, zero-telemetry self-hosting, sub-cent 1M-token processing, and formal mathematical proofs.
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 | DeepSeek V5 (Leaked Staging) | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 81.4% | 74.2% |
| MMLU-Pro | 87.5% | 89.8% |
| MATH-500 | 96.8% | 95.4% |
| Context Window | 1,000,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $0.12 | $0.00 |
| Output Pricing (per 1M) | $0.48 | $0.00 |