Gemini 4 Argon vs Union Alpha (Stealth)
A direct, empirical evaluation of Gemini 4 Argon (Google DeepMind) against Union Alpha (Stealth) (OpenRouter & OpenCode).
Gemini 4 Argon
Developed by Google DeepMind · Frontier Coding & Security Engine on TPU v6e Ironclad parameters
Automated GitHub issue resolution (78.4% SWE-bench Verified), cybersecurity exploit auditing (91.4% CyberSecBench), 2M token context buffer, and aggressive $1.20/$4.80 API pricing.
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 | Gemini 4 Argon | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 78.4% | 74.2% |
| MMLU-Pro | 93.6% | 89.8% |
| MATH-500 | 97.6% | 95.4% |
| Context Window | 2,000,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $1.20 | $0.00 |
| Output Pricing (per 1M) | $4.80 | $0.00 |