Inworld TTS-2 Flash price: $15 per 1M characters, and Sume's count
Inworld lists TTS-2 Flash at $15 per 1M characters on On-Demand, less on paid plans. How characters are counted on Sume TTS 1.0, and its limits per request.
Inworld's pricing page lists TTS-2 Flash at $15 per 1M characters on On-Demand, which is $0.015 per 1,000 characters, and lower on paid plans. Sume has no Flash tier to match it: TTS 1.0 is a single listing at $0.0475 per 1,000 characters.
How much does Flash save on a 5,000-character script?
Using only the On-Demand rates on the page, a 5,000-character script is 5 x $0.015 = $0.075 on Flash and 5 x $0.025 = $0.125 on TTS-2. Under the page's Enterprise column, custom pricing, Flash is listed as "Sub-$5/1M" and TTS-2 as "As low as $5/1M". Read 2026-10-01.
| Model | Per 1M characters | 5,000 characters |
|---|---|---|
| TTS-2 Flash | $15 | $0.075 |
| TTS-2 | $25 | $0.125 |
Is there a Flash-style tier on Sume?
No. TTS 1.0 has no engine picker, so there is no second tier to select; model and model_id are not how an engine is chosen. Named Sonic ids are in the Router catalog, described in Cartesia Sonic 3.6 model ids. Counting rules are in the API reference.
Where is the rest of the pricing picture?
Read text-to-speech API pricing for Sume's per-character quote and what counts toward it.
Sources
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Written by Sume