Gemini 2 to 3

Migrate a Gemini 2.5 session to Gemini 3.1 Pro Preview by sharing history through SqliteDb.

Google shut down Gemini 3 Pro Preview on March 9, 2026. The pinned gemini-3-pro-preview ID currently aliases to gemini-3.1-pro-preview; replace it explicitly before running.

gemini_2_to_3.py

"""
Async example using Gemini with tool calls.
"""

import asyncio
from uuid import uuid4

from agno.agent import Agent
from agno.db.sqlite.sqlite import SqliteDb
from agno.models.google import Gemini
from agno.tools.websearch import WebSearchTools

# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------

session_id = str(uuid4())

agent = Agent(
    model=Gemini(id="gemini-2.5-flash"),
    db=SqliteDb(db_file="tmp/data.db"),
    tools=[WebSearchTools()],
    markdown=True,
    add_history_to_context=True,
)

asyncio.run(
    agent.aprint_response(
        "Whats the current news in France?", session_id=session_id, stream=True
    )
)

# Create a new agent with Gemini 3 Pro and re-use the history from the previous session
agent = Agent(
    model=Gemini(id="gemini-3-pro-preview"),
    db=SqliteDb(db_file="tmp/data.db"),
    markdown=True,
    add_history_to_context=True,
)
asyncio.run(
    agent.aprint_response(
        "Write a 2 sentence story the biggest news highlight in our conversation.",
        session_id=session_id,
        stream=True,
    )
)

# ---------------------------------------------------------------------------
# Run Agent
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    pass

Run the Example

1. Set up your virtual environment

   Mac

   uv venv --python 3.12
   source .venv/bin/activate
   

   uv venv --python 3.12
   .venv\Scripts\activate
   
2. Install dependencies

   uv pip install -U agno ddgs google-genai sqlalchemy
   
3. Export your Google API key

   Mac/Linux

   export GOOGLE_API_KEY="your_google_api_key_here"
   

   $Env:GOOGLE_API_KEY="your_google_api_key_here"
   
4. Use Gemini 3.1 Pro Preview

   Replace gemini-3-pro-preview with gemini-3.1-pro-preview in the saved Python file before running.

5. Run the example

   Save the code above as gemini_2_to_3.py, then run:

   python gemini_2_to_3.py
   

Full source: cookbook/90_models/google/gemini/gemini_2_to_3.py