How long can a live agent session remains open for?

[xuanyang15]

I have a streaming tool that needs to continuously monitor something for long periods of time, and I was wondering how long the session could remain open for without manual user input as well as whether the time it remains open for counts towards the free tier quota for Gemini Live.

Thank you!

[adk-bot]

Response from ADK Answering Agent (experimental, answer may be inaccurate)

TLDR: A live agent session duration is limited (15 minutes for audio-only, 2 minutes for audio-video without compression). The free tier is based on the number of concurrent sessions (3 for Gemini 2.5 Flash Live), not the duration of the sessions.

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Hello! I can provide some information regarding your questions about Gemini Live agent sessions.

Session Duration

The maximum duration of a live agent session depends on the session type:

• Audio-only sessions (without compression): 15 minutes
• Audio-video sessions (without compression): 2 minutes

If these limits are exceeded, the session will be terminated. [1]

Free Tier Quota

The free tier for the Gemini Live API is determined by the number of concurrent sessions, not the total duration of a session. For the Gemini 2.5 Flash Live model, you are limited to 3 concurrent sessions under the free tier. The input and output for the Live API are free of charge. [2, 3]

Therefore, while the length of a single session is limited, what counts towards the free tier is the number of sessions you have open at the same time.

I hope this helps!

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[1] https://ai.google.dev/gemini-api/docs/live-session
[2] https://ai.google.dev/gemini-api/docs/pricing
[3] https://ai.google.dev/gemini-api/docs/rate-limits