can you update model prams using session update options LiveKit Community #ask-ai

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can you update model prams using session.update_op...

# ask-ai

polite-dog-12152

09/14/2025, 7:53 AM

can you update model prams using session.update_options()

tall-airline-16756

09/14/2025, 7:53 AM

Thanks for reaching out, arpan. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.

tall-airline-16756

09/14/2025, 7:53 AM

Absolutely, you can update model parameters using

session.update_options()

in LiveKit. The exact parameters you can change depend on the plugin you're working with: • Google Realtime API: You can update parameters like

voice

temperature

, and

tool_choice

. Just a heads-up, updating

instructions

might need a session restart. • OpenAI Realtime API: Parameters such as

voice

temperature

turn_detection

tool_choice

, and more can be updated smoothly without restarting the session. • Gladia STT: You have the flexibility to update a variety of parameters like

languages

translation_enabled

, and

custom_vocabulary

, which will affect all active streams. • Deepgram STT: Parameters including

language

model

interim_results

, and

keywords

can be updated for all active streams as well. If you'd like, I’m here to help with more details about any specific plugin or parameter—just let me know! Sources: livekit-agents/livekit/agents/voice/agent_activity.py

polite-dog-12152

09/14/2025, 8:17 AM

no i talike if middle of conversation user change language can i change language with session.update_options()

tall-airline-16756

09/14/2025, 8:18 AM

If you'd like to change the language in the middle of a conversation, the best way is to call

update_options(language=...)

directly on the STT (Speech-to-Text) and TTS (Text-to-Speech) components of your agent, instead of using

session.update_options()

. This helps ensure everything switches smoothly. Here’s a simple example to guide you:

Copy code

async def _switch_language(self, language_code: str):
    if self.tts is not None:
        self.tts.update_options(language=language_code)
    
    if self.stt is not None:
        self.stt.update_options(language=language_code)
    
    await self.session.say(f"Switched to {language_code}")

This way, both the transcription and voice output languages get updated dynamically. If you want to see this in action, there’s a helpful example in the Change Language recipe. And of course, if you’d like a hand implementing this or have any questions about a specific plugin, just reach out—I’m here to help! Sources: Hume TTS integration guide | LiveKit Docs | pipeline-tts/elevenlabs_change_language.py | livekit-plugins/livekit-plugins-google/livekit/plugins/google/stt.py | LiveKit Docs

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