Speech-to-Text (STT)

Telnyx hosts Deepgram models on dedicated GPUs. Access them through the Telnyx plugin:

from livekit.plugins import telnyx

stt = telnyx.deepgram.STT(model="nova-3", language="en")

The plugin provides two STT classes:

telnyx.deepgram.STT — Recommended. Connects to Deepgram models hosted on Telnyx GPUs. Takes a model parameter (nova-3, nova-2, flux).
telnyx.STT — Connects to Telnyx’s own transcription engine (default) or Deepgram via transcription_engine="Deepgram". Takes a transcription_engine parameter instead of model.

For most use cases, telnyx.deepgram.STT is the simpler interface.

Plugin source on GitHub

Available models

Nova-3 (recommended)

Latest generation, best accuracy.

stt = telnyx.deepgram.STT(
    model="nova-3",
    language="en",
    interim_results=True,
    keyterm=["YourBrand", "custom-term"],  # keyword boosting
)

Nova-2

Previous generation, stable and reliable. Uses weighted keyword boosting.

stt = telnyx.deepgram.STT(
    model="nova-2",
    language="en",
    interim_results=True,
    keywords=["YourBrand:2.0", "custom-term:1.5"],
)

Flux

Experimental, with built-in end-of-turn detection. Designed for real-time voice agents.

stt = telnyx.deepgram.STT(
    model="flux",
    language="en",
    interim_results=True,
    keyterm=["YourBrand", "custom-term"],
    eot_threshold=0.5,
    eot_timeout_ms=3000,
    eager_eot_threshold=0.3,
)

Parameters

Parameter	Default	Description
`model`	`nova-3`	Model to use (`nova-3`, `nova-2`, `flux`)
`language`	`en`	Language code
`interim_results`	`True`	Stream partial transcriptions
`keyterm`	—	Keyword boosting (Nova-3, Flux)
`keywords`	—	Weighted keyword boosting (Nova-2)
`eot_threshold`	—	End-of-turn confidence threshold (Flux only)
`eot_timeout_ms`	—	End-of-turn timeout in ms (Flux only)
`eager_eot_threshold`	—	Eager end-of-turn threshold (Flux only)

LiveKit on Telnyx (Beta)

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Plugin Reference

Observability

Telephony

Reference

For AI Agents

Speech-to-Text (STT)

Available models

Nova-3 (recommended)

Nova-2

Flux

Parameters

​Available models

​Nova-3 (recommended)

​Nova-2

​Flux

​Parameters

Available models

Nova-3 (recommended)

Nova-2

Flux

Parameters