Which should you pick?
Gemini 3.8 Flash TTS costs 2 credits (headline rate) and Seed Audio 1.0 costs 17 credits (headline rate). One of the two does not publish what a full job costs, only a headline rate, so these two figures are not a like-for-like price comparison.
What a job costs
Gemini 3.8 Flash TTS
2 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters2 credits
Seed Audio 1.0
17 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters17 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | Gemini 3.8 Flash TTS | Seed Audio 1.0 |
|---|---|---|
| Provider | ByteDance | |
| Cost per job | 2 credits (headline rate) | 17 credits (headline rate) |
| Billing | per 1,000 characters of input text | per 1,000 characters of input text |
| Max resolution | — | — |
| Aspect ratios | — | — |
| Durations | — | — |
| Frame rates | — | — |
| Qualities | — | — |
| Requires starting image | No | No |
| Accepts video input | No | No |
| Reference images | — | — |
| Leaderboard | #5 in text to audio | Unranked |
| Released | Sep 23, 2026 | Jun 23, 2026 |
What each one does that the other doesn't
Only Gemini 3.8 Flash TTS
expressive, style direction, audio tags, multilingual, multi speaker, 30 voices
Only Seed Audio 1.0
reference audio, reference image, voice presets, pitch speed control
Both list: text to audio, text to speech.
Leaderboard positions
Versely ranks each capability on its own leaderboard, so a position is only comparable between two models within the same row.
Gemini 3.8 Flash TTS
- Text to audio#5
Seed Audio 1.0
Not on a Versely leaderboard yet.
Full Gemini 3.8 Flash TTS spec sheet →
Google Gemini 3.8 Flash TTS - Google's most expressive voice model: 30 voices, 130 languages, natural-language style direction, inline audio tags ([sigh], [laughs]) and two-speaker dialogue.
Full Seed Audio 1.0 spec sheet →
ByteDance Seed Audio 1.0 — high-quality, natural-sounding text-to-speech with preset voices, optional reference audio (@Audio1–@Audio3) or a reference image, and speed/pitch/volume controls.
More comparisons
Frequently asked questions
Which is cheaper, Gemini 3.8 Flash TTS or Seed Audio 1.0?+
They are not directly comparable on price: Gemini 3.8 Flash TTS costs 2 credits (headline rate) and Seed Audio 1.0 costs 17 credits (headline rate), and one of those is a headline rate rather than the cost of a complete job.
What can Gemini 3.8 Flash TTS do that Seed Audio 1.0 can't, or vice versa?+
Only Gemini 3.8 Flash TTS lists expressive, style direction, audio tags, multilingual, multi speaker, 30 voices. Only Seed Audio 1.0 lists reference audio, reference image, voice presets, pitch speed control. Both list text to audio, text to speech.
How do Gemini 3.8 Flash TTS and Seed Audio 1.0 bill?+
Gemini 3.8 Flash TTS bills per 1,000 characters of input text. Seed Audio 1.0 bills per 1,000 characters of input text. Both are charged in Versely credits.
Try both inside Versely
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