API: simba-3.0 is the new default TTS model

API: `simba-3.0` is the new default TTS model

POST /v1/audio/speech, POST /v1/audio/stream and POST /v1/audio/stream/with-timestamps now resolve a request that omits model to simba-3.0 instead of the legacy simba-english. GET /v1/audio/models marks the change on its default flag.

Nothing you already send changes shape, and nothing that worked starts failing. A request that names a model explicitly is untouched - model: "simba-english" keeps getting Simba 1.6 English, and that model stays fully supported with nothing scheduled for removal.

What changes if you omit model:

	Before (`simba-english`)	Now (`simba-3.0`)
Voices accepted	any voice in `GET /v1/voices`	unchanged - any voice, cloned voices self-serve
Non-English voices	synthesized by the English 1.6 training	routed to the Simba 3.0 multilingual training
`POST /v1/audio/stream/with-timestamps`	`400 speech_marks_unsupported`	supported
Audio	Simba 1.6	Simba 3.0 - streaming-native, lower time-to-first-byte

simba-3.0 was chosen over the recommended simba-3.2 precisely because it accepts everything the old default did: simba-3.2 serves a curated voice set and rejects non-English voices, so making it the default would have turned working calls into 400s.

The rendered audio does change if you omit model. Pin the old behaviour by sending model: "simba-english" explicitly if your integration depends on the Simba 1.6 output. For new English work we still recommend model: "simba-3.2" - see Models.