Gemini

You’ll need a Gemini API key.

First, install aider:

python -m pip install aider-install
aider-install

Then configure your API keys:

export GEMINI_API_KEY=<key> # Mac/Linux
setx GEMINI_API_KEY <key> # Windows, restart shell after setx

Start working with aider and Gemini on your codebase:

# Change directory into your codebase
cd /to/your/project
# You can run the Gemini 2.5 Pro model with this shortcut:
aider --model gemini
# You can run the Gemini 2.5 Pro Exp for free, with usage limits:
aider --model gemini-exp
# List models available from Gemini
aider --list-models gemini/

You may need to install the google-generativeai package.

# If you installed with aider-install or `uv tool`
uv tool run --from aider-chat pip install google-generativeai
# Or with pipx...
pipx inject aider-chat google-generativeai
# Or with pip
pip install -U google-generativeai