Gemini 3.8 Flash TTS vs GPT-6.1 Sol
A direct, empirical evaluation of Gemini 3.8 Flash TTS (Google DeepMind) against GPT-6.1 Sol (OpenAI).
Gemini 3.8 Flash TTS
Developed by Google DeepMind · Proprietary Multimodal Acoustic Flow Matching Transformer parameters
High-fidelity expressive podcasts, interactive video game dialogues, scripted multi-speaker conversations, and prompt-designed custom character voices.
GPT-6.1 Sol
Developed by OpenAI · Proprietary Frontier Workhorse Engine parameters
Near-Astra reasoning at 1/5th price ($1.25/$5.00), SWE-bench Verified 74.8%, OSWorld 2.0 desktop agent automation, and sub-80ms Ultrafast Mode.
| Metric | Gemini 3.8 Flash TTS | GPT-6.1 Sol |
|---|---|---|
| SWE-bench Verified | 64.2% | 74.8% |
| MMLU-Pro | 88.5% | 92.4% |
| MATH-500 | 91% | 96.2% |
| Context Window | 128,000 characters input dialogue script | 1,000,000 tokens |
| Input Pricing (per 1M) | $0.15 | $1.25 |
| Output Pricing (per 1M) | $15.00 | $5.00 |