Which should you pick?
Gemini 3.1 Flash TTS costs 12 credits (headline rate) and Inworld TTS 2 Flash costs 2 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.
Inworld TTS 2 Flash holds the stronger leaderboard position (#13 in text to audio against #16 in text to audio). Those are two different leaderboards unless the category matches — Versely ranks each capability separately.
What a job costs
Gemini 3.1 Flash TTS
12 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters12 credits
Inworld TTS 2 Flash
2 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters2 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | Gemini 3.1 Flash TTS | Inworld TTS 2 Flash |
|---|---|---|
| Provider | Inworld | |
| Cost per job | 12 credits (headline rate) | 2 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 | #16 in text to audio | #13 in text to audio |
| Released | Apr 15, 2026 | Sep 2, 2026 |
What each one does that the other doesn't
Only Gemini 3.1 Flash TTS
expressive, audio tags, multi speaker, 30 voices
Only Inworld TTS 2 Flash
fast, low latency, 200+ languages, voice clone, value
Both list: text to audio, text to speech, multilingual.
Leaderboard positions
Versely ranks each capability on its own leaderboard, so a position is only comparable between two models within the same row.
Gemini 3.1 Flash TTS
- Text to audio#16
Inworld TTS 2 Flash
- Text to audio#13
Full Gemini 3.1 Flash TTS spec sheet →
Google Gemini 3.1 Flash TTS — expressive text-to-speech with 30 voices, natural-language style control, inline audio tags ([sigh], [laughing], [whispering]), multilingual synthesis, and multi-speaker dialogue.
Full Inworld TTS 2 Flash spec sheet →
Inworld Realtime TTS-2 Flash: the low-latency tier of TTS-2, around five times faster to first audio and 40% cheaper, with the same 200+ languages and voice cloning. Best for high-volume and conversational use.
Frequently asked questions
Which is cheaper, Gemini 3.1 Flash TTS or Inworld TTS 2 Flash?+
They are not directly comparable on price: Gemini 3.1 Flash TTS costs 12 credits (headline rate) and Inworld TTS 2 Flash costs 2 credits (headline rate), and one of those is a headline rate rather than the cost of a complete job.
What can Gemini 3.1 Flash TTS do that Inworld TTS 2 Flash can't, or vice versa?+
Only Gemini 3.1 Flash TTS lists expressive, audio tags, multi speaker, 30 voices. Only Inworld TTS 2 Flash lists fast, low latency, 200+ languages, voice clone, value. Both list text to audio, text to speech, multilingual.
How do Gemini 3.1 Flash TTS and Inworld TTS 2 Flash bill?+
Gemini 3.1 Flash TTS bills per 1,000 characters of input text. Inworld TTS 2 Flash bills per 1,000 characters of input text. Both are charged in Versely credits.
Which ranks higher, Gemini 3.1 Flash TTS or Inworld TTS 2 Flash?+
Gemini 3.1 Flash TTS sits at #16 in text to audio and Inworld TTS 2 Flash at #13 in text to audio on Versely's live model rankings. Versely ranks each capability on its own leaderboard, so those positions are only a direct comparison when the category is the same.
Try both inside Versely
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