Shortest Sume TTS job: a 1 cent minimum and a 95 cent ceiling

Sume TTS 1.0 is priced at $0.0475 per 1,000 characters. The catalog sets a minimum charge of 1 cent per request and a maximum of 95 cents, which is the price of a full 20,000-character request. Spaces and punctuation count as characters.

Cost by length

The rounding catch

Rounding is per job. 100 voice lines of 50 characters each, submitted as 100 jobs, bill $1.00. The same 5,000 characters in one job bill $0.24. If you need separate files, ask for sentence segments from one job (wav container, timestamps.words true) instead of submitting every line alone.

When separate jobs still win

One job per line is simpler when lines change at different times: a game with 400 lines where a writer edits a few each week re-renders only the edited ones. Batch when the text is stable, and keep one job per line when it is not.

• Stable narration: one job with sentence segments.
• Frequently edited lines: one job per line, with an idempotency key derived from the text.
• Unknown future edits: start with per-line jobs and consolidate for the final render.

Check the number yourself

Use the live catalog price before you plan a large run, because rate cards change. The figures here are the catalog values in Sume's repository on 2026-10-05, based on Cartesia's list price times Sume's standard 1.25 margin.