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Gemini Live API

GoogleAudio & SpeechProprietary

Google's real-time multimodal streaming API for voice-in, voice-out conversational AI. Supports low-latency audio interaction with function calling mid-conversation.

Abilities

Audio GenerationAudio TranscriptionFunction CallingMultilingualReasoning

Use Cases

ChatbotEnterpriseAutomationEducation

Available in Tools

Google AI Studiohttps://aistudio.google.com
LiveKithttps://livekit.io

Availability

APIhttps://ai.google.dev/gemini-api/docs/live-api
Google AI Studiohttps://aistudio.google.com
Vertex AIhttps://cloud.google.com/vertex-ai

How to Use

Use the Gemini Live API endpoint for real-time audio streaming. Supports session-based conversations with function calling. Billing is per-turn based on accumulated context tokens.

Pros

  • Real-time voice-in, voice-out — low-latency conversational audio
  • Function calling mid-conversation — agents can take actions while talking
  • Multimodal input — supports audio, video, and text simultaneously
  • Proactive audio mode — can listen and respond naturally in pauses
  • Multiple model options from Flash-Lite (cheapest) to Pro (best quality)

Cons

  • Token billing accumulates across turns — costs grow with conversation length
  • Requires stable internet connection for real-time streaming
  • Session management complexity for production applications
  • Closed source — no self-hosting option for latency-sensitive deployments

What to Use It For

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Perfect For

Real-time voice AI assistants

Low-latency voice-in/voice-out with function calling enables natural conversational agents

Interactive voice-driven applications

Session-based streaming with proactive listening creates natural dialogue experiences

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Good For

Customer service voice bots

Real-time responses with function calling can handle queries and take actions simultaneously

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Not Recommended

Batch audio processing

Designed for real-time streaming — batch processing is more cost-effective with standard API

Try instead: Gemini Flash (Audio)

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Do Not Use For

Offline voice applications

Real-time streaming requires constant internet connection

Image or video generation

Audio interaction API — not an image/video generation model

Try instead: Veo, Gemini Nano Banana

Technical Details

PricingToken-based, Flash-Lite from $0.25/1M tokens, per-turn billing

Links

language Website description API Documentation