Gemini 3.8 Flash-Lite TTS vs GPT-6 Astra
A direct, empirical evaluation of Gemini 3.8 Flash-Lite TTS (Google DeepMind) against GPT-6 Astra (OpenAI).
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.
GPT-6 Astra
Developed by OpenAI · Proprietary Frontier parameters
Complex multi-step engineering, formal math proofs, autonomous computer/browser navigation, and CAD synthesis.
| Metric | Gemini 3.8 Flash-Lite TTS | GPT-6 Astra |
|---|---|---|
| SWE-bench Verified | 58.4% | 79.4% |
| MMLU-Pro | 82.1% | 91.2% |
| MATH-500 | 85.2% | 98.6% |
| Context Window | 64,000 characters input script | 1,050,000 tokens |
| Input Pricing (per 1M) | $0.08 | $10.00 |
| Output Pricing (per 1M) | $6.00 | $50.00 |