Which should you pick?
Cartesia Sonic 3.5 costs 5 credits (headline rate) and Inworld TTS 1.5 Max costs 4 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.
Cartesia Sonic 3.5 holds the stronger leaderboard position (#5 in text to audio against #7 in text to audio). Those are two different leaderboards unless the category matches — Versely ranks each capability separately.
What a job costs
Cartesia Sonic 3.5
5 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters12 credits
Inworld TTS 1.5 Max
4 credits (headline rate)
It bills per 1,000 characters of input text.
- per 1,000 characters12 credits
All figures are Versely credits. Your plan's credit allowance is on the pricing page.
Spec comparison
| Spec | Cartesia Sonic 3.5 | Inworld TTS 1.5 Max |
|---|---|---|
| Provider | Cartesia | Inworld |
| Cost per job | 5 credits (headline rate) | 4 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 | #7 in text to audio |
| Released | Jun 16, 2026 | Jan 21, 2026 |
What each one does that the other doesn't
Only Cartesia Sonic 3.5
voice clone, voice clone, emotion control, speed control, top ranked
Only Inworld TTS 1.5 Max
expressive, voice library
Both list: text to audio, text to speech, multilingual, high quality.
Leaderboard positions
Versely ranks each capability on its own leaderboard, so a position is only comparable between two models within the same row.
Cartesia Sonic 3.5
- Text to audio#5
Inworld TTS 1.5 Max
- Text to audio#7
Full Cartesia Sonic 3.5 spec sheet →
Cartesia's newest and top-ranked TTS model (Sonic 3.5). Multilingual, highly expressive, with emotion control, speed tuning, and voice cloning.
Full Inworld TTS 1.5 Max spec sheet →
Inworld Realtime TTS 1.5 Max — the #1 ranked Inworld model, delivering the best balance of quality and speed. Expressive, multilingual (15 languages), with voice library support.
Frequently asked questions
Which is cheaper, Cartesia Sonic 3.5 or Inworld TTS 1.5 Max?+
They are not directly comparable on price: Cartesia Sonic 3.5 costs 5 credits (headline rate) and Inworld TTS 1.5 Max costs 4 credits (headline rate), and one of those is a headline rate rather than the cost of a complete job.
What can Cartesia Sonic 3.5 do that Inworld TTS 1.5 Max can't, or vice versa?+
Only Cartesia Sonic 3.5 lists voice clone, voice clone, emotion control, speed control, top ranked. Only Inworld TTS 1.5 Max lists expressive, voice library. Both list text to audio, text to speech, multilingual, high quality.
How do Cartesia Sonic 3.5 and Inworld TTS 1.5 Max bill?+
Cartesia Sonic 3.5 bills per 1,000 characters of input text. Inworld TTS 1.5 Max bills per 1,000 characters of input text. Both are charged in Versely credits.
Which ranks higher, Cartesia Sonic 3.5 or Inworld TTS 1.5 Max?+
Cartesia Sonic 3.5 sits at #5 in text to audio and Inworld TTS 1.5 Max at #7 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
The all-in-one AI studio for creators. 60+ models for video, image, voice, music and lipsync in a single app.