v1alpha support for Live API 'gemini-live-2.5-flash-preview-native-audio-09-2025' in Google AKD Agents

[bhavyajoshi-mahindra]

How do I use 'gemini-live-2.5-flash-preview-native-audio-09-2025' in Google ADK agents. I am facing this issue:

from google.adk.agents import Agent
import os 

from google.genai.types import (
    GenerateContentConfig,
    HarmBlockThreshold,
    HarmCategory,
    SafetySetting,
)

from .prompts import AGENT_INSTRUCTION

genai_config = GenerateContentConfig(
    temperature=0.5
)

root_agent = Agent(
   name='agents',
   model="gemini-2.5-flash-native-audio-preview-09-2025",
   description="A helpful AI assistant.",
   instruction=AGENT_INSTRUCTION
)

I am getting this logs:

Starting client_to_agent_messaging task
Connection closed: received 1008 (policy violation) models/gemini-live-2.5-flash-preview-native-audio-09-2025 is not found for API version v1alpha, or is not supported for bid; then sent 1008 (policy violation) models/gemini-live-2.5-flash-preview-native-audio-09-2025 is not found for API version v1alpha, or is not supported for bid.
Error in agent_to_client_messaging loop: received 1008 (policy violation) models/gemini-live-2.5-flash-preview-native-audio-09-2025 is not found for API version v1alpha, or is not supported for bid; then sent 1008 (policy violation) models/gemini-live-2.5-flash-preview-native-audio-09-2025 is not found for API version v1alpha, or is not supported for bid
agent_to_client_messaging task finished

Google AKD version : 1.19.0

[adk-bot]

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

TLDR: The error message suggests that the model gemini-live-2.5-flash-preview-native-audio-09-2025 is not available in the v1alpha API version that your ADK agent is currently using. You are also using a slightly different model name in your Agent configuration (gemini-2.5-flash-native-audio-preview-09-2025).

---

Hello! Thanks for reaching out. Let's break down the issue.

The error message you're seeing is key: models/gemini-live-2.5-flash-preview-native-audio-09-2025 is not found for API version v1alpha.

This indicates two things:

1. API Version: Your Agent is attempting to use the v1alpha version of the API. The model you're trying to use is a preview model and likely requires a newer API version (e.g., v1beta). The v1alpha version may not support this model.

2. Model Name: There's a slight difference between the model name in your code and the one in the error log.

   • In your Agent config: gemini-2.5-flash-native-audio-preview-09-2025
   • In the error message: gemini-live-2.5-flash-preview-native-audio-09-2025

The correct model name for the Live API is indeed gemini-2.5-flash-native-audio-preview-09-2025. It seems the ADK might be implicitly adding "live" to the model name, which could be part of the issue if that's not the expected behavior.

While I don't have the specific instructions on how to force a newer API version within the ADK v1.19.0, the root cause is very likely the v1alpha API version. You may need to check the ADK documentation or examples for how to configure the agent to use a more recent API version that supports this preview model.

I hope this helps you move in the right direction!

[1] https://ai.google.dev/gemini-api/docs/models
[2] https://ai.google.dev/gemini-api/docs/live

[hangfei]

Please checkout this to understand how to use the right API: https://google.github.io/adk-docs/streaming/dev-guide/part1/#12-gemini-live-api-and-vertex-ai-live-api