Cartesia Sonic production skill

Use this skill when a media-production agent is choosing, prompting, integrating, or reviewing Cartesia Sonic for speech output. Treat Sonic as a low-latency text-to-speech provider first; use adjacent Cartesia voice APIs only when the production need explicitly requires them.

All volatile facts below were checked against official Cartesia documentation or legal pages on 2026-07-10. Re-check before committing budgets, compliance claims, model IDs, pricing, concurrency, supported languages, or API behavior.

Provider boundary

Documented facts:

• Sonic is Cartesia's text-to-speech model family. The current production default is sonic-3.5; API references also list sonic-3 and sonic-latest.
• Sonic takes text and returns generated speech. It is suitable for realtime voice agents, narration, dubbing, avatars, notifications, ads, and localization when the workflow starts from a transcript.
• Cartesia also documents Ink speech-to-text, Line hosted voice agents, voice cloning, voice localization, infill, and voice changer. Do not present all of these as "Sonic TTS"; name the exact Cartesia surface being used.
• Voice changer is not TTS: it takes an input speech clip and returns speech with the same intonation in a different target voice.
• Speech-to-speech or voice conversion claims should be limited to the documented voice-changer endpoints unless Cartesia's docs explicitly add another supported path.

Production heuristics: