Gladia

Gladia is a speech-to-text plugin. It transcribes the caller’s audio into text for the LLM, with support for 90+ languages and automatic code-switching between them.

Setup

Set your Gladia API key in the worker environment. Generate a key from the Gladia dashboard:

export GLADIA_API_KEY=<key>

Usage

Import the plugin and pass it to the pipeline’s stt slot.

from zrt.plugins import GladiaSTT

stt = GladiaSTT()

# Pipeline(stt=stt, ...)

Parameters

Parameter	Type	Default	Description
`api_key`	`str \| None`	`None`	Gladia API key. Falls back to the `GLADIA_API_KEY` environment variable when unset.
`model`	`str`	`"solaria-1"`	Gladia recognition model. `"solaria-1"` is the only production model and the default.
`languages`	`List[str] \| None`	`None`	ISO 639-1 language codes to hint at (e.g. `["en", "fr"]`). Only the first element is used. When `None`, the default is `"english"`.
`code_switching`	`bool`	`True`	When `True`, language is re-detected on every utterance. When `False`, language is detected once on the first utterance and held for the session.
`input_sample_rate`	`int`	`48000`	Sample rate (Hz) of the incoming audio before any resampling. Valid values: `8000`, `16000`, `32000`, `44100`, `48000`.
`output_sample_rate`	`int`	`16000`	Sample rate (Hz) forwarded to the Gladia WebSocket session.
`encoding`	`str`	`"wav/pcm"`	PCM encoding format sent over the WebSocket. Valid values: `"wav/pcm"`, `"wav/alaw"`, `"wav/ulaw"`.
`bit_depth`	`int`	`16`	Bit depth of the PCM samples. Valid values: `8`, `16`, `24`, `32`.
`channels`	`int`	`1`	Number of audio channels (1-8). Default is mono.
`receive_partial_transcripts`	`bool`	`False`	When `True`, partial (non-final) transcripts are emitted over the WebSocket before the utterance is complete.

Transcribed text passes to the LLM once turn detection decides the caller has finished speaking.

Plugins

Inference Gateway

Speech-to-text

LLM

Text-to-speech

Realtime models

Avatars

Turn detection

Voice activity detection

Noise cancellation

Setup

Usage

Parameters

​Setup

​Usage

​Parameters

Setup

Usage

Parameters