List available TTS models at runtime with GET /v1/audio/models

GET /v1/audio/models returns the text-to-speech models you can pass as the model parameter, so a model picker can be populated at runtime instead of hardcoding the list.

Each entry carries the model id, a human-readable name and description, a default flag (the model a request resolves to when it omits model), a recommended flag (what we suggest for new integrations, kept distinct from the default so backwards compatibility never shifts underneath you), and the languages it can synthesize as BCP-47 locale strings. These values reflect current support and change over time, so read them at runtime rather than caching them.

The Build changelog entry has the full response shape.