Gemini 4 Pro (Projected) vs Union Alpha (Stealth)
A direct, empirical evaluation of Gemini 4 Pro (Projected) (Google DeepMind) against Union Alpha (Stealth) (OpenRouter & OpenCode).
Gemini 4 Pro (Projected)
Developed by Google DeepMind · Proprietary Omni-Modal Unified Diffusion Transformer parameters
Repository-scale 10M-token refactoring, automated formal theorem proving, parametric SVG and 3D GLTF asset synthesis, and zero-hallucination execution.
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 Pro (Projected) | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 75.8% | 74.2% |
| MMLU-Pro | 92.4% | 89.8% |
| MATH-500 | 97.2% | 95.4% |
| Context Window | 2,000,000 - 10,000,000 tokens | 256,000 tokens |
| Input Pricing (per 1M) | $1.50 | $0.00 |
| Output Pricing (per 1M) | $7.50 | $0.00 |