Gemini 3.8 Flash-Lite TTS vs Union Alpha (Stealth)
A direct, empirical evaluation of Gemini 3.8 Flash-Lite TTS (Google DeepMind) against Union Alpha (Stealth) (OpenRouter & OpenCode).
Gemini 3.8 Flash-Lite TTS
Developed by Google DeepMind · Proprietary Lightweight Acoustic Stream Transformer parameters
High-throughput bulk multilingual video dubbing, automated notification dispatch, real-time voice agents, customer support telephony, and accessibility readers.
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 3.8 Flash-Lite TTS | Union Alpha (Stealth) |
|---|---|---|
| SWE-bench Verified | 58.4% | 74.2% |
| MMLU-Pro | 82.1% | 89.8% |
| MATH-500 | 85.2% | 95.4% |
| Context Window | 64,000 characters input script | 256,000 tokens |
| Input Pricing (per 1M) | $0.08 | $0.00 |
| Output Pricing (per 1M) | $6.00 | $0.00 |