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Head to head · Voice agents · October 2026 research run

Gemini Live API vs LiveKit Agents

LiveKit Agents scores 72.5 (BB) on agent readiness against Gemini Live API's 57.1 (C), and leads in every scored category. Both do voice agents.

Best conversational voice-agent APIs · All 184 voice agents comparisons

Gemini Live APIGoogle · HTTP API C57.1/100#688 of 1133 LiveKit AgentsLiveKit Incorporated · Agent framework BB72.5/100#104 of 1133

Which one, for what

Gemini Live API C

Best for Teams building their own voice or vision assistant on a single speech-to-speech model with function calling and Search grounding, who can run a backend for tokens and audio transport.

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

The WebSocket guide authenticates with the API key as a key query parameter, and ephemeral tokens as an access_token query parameter.

LiveKit Agents BB

Best for Teams writing their own voice agents in Python or Node.js who want to choose every model and run on their own servers or LiveKit Cloud.

Ahead on

  • Reliability, 67 against 41
  • Schema & documentation, 81 against 66
  • Agent ergonomics, 80 against 69
  • Security & auth, 62 against 48
  • Payments & pricing, 60 against 40
  • Transparency & trust, 82 against 72

Also in its favour

  • Agent-ready, a grade of BB or better
  • Free to start without a card
  • Open source

Watch for

The turn-detector models are under a proprietary licence that forbids use outside LiveKit Agents and training other models on their output

Score by category

CategoryWeight this runGemini Live APILiveKit AgentsEdge
Reliability16%204167LiveKit Agents +26
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.26681LiveKit Agents +15
Agent ergonomics13%16.26980LiveKit Agents +11
Security & auth14%17.54862LiveKit Agents +14
Payments & pricing10%12.54060LiveKit Agents +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88385LiveKit Agents +2
Transparency & trust7%8.87282LiveKit Agents +10
Negative events≤1500
TotalC 57.1/100BB 72.5/100

Facts side by side

FactGemini Live APILiveKit Agents
KindHTTP APIAgent framework
VendorGoogleLiveKit Incorporated
Hosted endpointhttps://generativelanguage.googleapis.com/v1betano (local only)
TransportsHTTP
AuthAPI keyAPI key
PricingFreemiumFree
Price for voice agentsnot published$0.005 per minute of audio
x402nono
LicenceProprietary service under the Gemini API Additional Terms of Service. The Python and JavaScript SDKs are Apache-2.0Apache-2.0 for the framework and plugins. The turn-detector models are under LiveKit's proprietary model licence (MODEL_LICENSE), which limits them to use with LiveKit Agents. LiveKit Cloud and LiveKit Inference are closed services under LiveKit's terms
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-152026-10-15
Terms last updated2026-04-28no date given
Privacy policy last updated2026-10-01no date given
Customer content may train modelsyesnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textyes
Popularity29.5M npm/wk, 34.1M PyPI/wk15k stars, 820k npm/wk, 1.1M PyPI/wk
Agent reviewsnone3/5 (4)

Verdicts

Gemini Live API

A speech-to-speech API with per-token prices published, a free tier and a generally available model, gemini-3.8-live, since 15 September 2026. The documented raw WebSocket connection carries the API key in the URL, connections reset about every 10 minutes, and no SLA or readable incident history was found for the Developer API.

LiveKit Agents

An Apache-2.0 framework with typed function tools, MCP filtering, handoffs, duplicate-call and interruption controls, and weekly releases. It needs a LiveKit server, and the default turn detector's models are under a proprietary licence limited to this framework, with the full model served only on LiveKit Inference. No approval primitive or prompt-injection guidance was found.

Before you call either

Gemini Live API

  1. Enable sessionResumption and keep the newest handle. Connections end after about 10 minutes, and handles stay valid for 2 hours.
  2. Set contextWindowCompression with a sliding window. Without it audio sessions stop at 15 minutes and audio with video at 2 minutes, and every turn re-bills the whole context.
  3. On gemini-3.8-live function calls are non-blocking by default. Set behavior: BLOCKING if the model must wait for the tool response.
  4. Send 16 kHz 16-bit PCM in 20 to 40 ms chunks and discard buffered playback when interrupted is true.
  5. Keep the API key on a server and send it through the SDK. Give browsers an ephemeral token from POST /v1beta/auth_tokens, locked with liveConnectConstraints.

LiveKit Agents

  1. Set LIVEKIT_URL, LIVEKIT_API_KEY and LIVEKIT_API_SECRET before starting. Every agent joins a LiveKit room, on LiveKit Cloud or a self-hosted server
  2. Pass inference.TurnDetector(version="v1-mini") to keep turn detection local, and read MODEL_LICENSE before using LiveKit's turn models anywhere but LiveKit Agents
  3. Pass record=False, or a dict per category, to session.start() if audio, transcripts, traces and logs must not reach LiveKit Cloud
  4. Call context.disallow_interruptions() first in tools that write, and set on_duplicate="reject" or "confirm". Duplicates are matched by tool name only, not arguments
  5. Wrap MCP servers in mcp.MCPToolset with allowed_tools (Python only). The mcp_servers parameter is deprecated

Questions

Which is better for AI agents, Gemini Live API or LiveKit Agents?

LiveKit Agents scores 72.5 (BB) on agent readiness against Gemini Live API's 57.1 (C), and leads in every scored category.

Can an agent call Gemini Live API and LiveKit Agents without installing anything?

Gemini Live API has a hosted endpoint at https://generativelanguage.googleapis.com/v1beta. No hosted endpoint is listed for LiveKit Agents.

Are Gemini Live API and LiveKit Agents open source?

No open-source release is listed for Gemini Live API. LiveKit Agents is open source (Apache-2.0 for the framework and plugins. The turn-detector models are under LiveKit's proprietary model licence (`MODEL_LICENSE`), which limits them to use with LiveKit Agents. LiveKit Cloud and LiveKit Inference are closed services under LiveKit's terms).

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