Skip to main content
Aider works with OpenAI-compatible endpoints through environment variables. 
export OPENAI_API_BASE="https://api.ethereal.llc/v1"
export OPENAI_API_KEY="eth-..."

aider --model openai/claude-sonnet-4-6
Other models: 
aider --model openai/claude-opus-4-8     # complex tasks
aider --model openai/claude-haiku-4-5    # fast and cheap
The openai/ prefix tells Aider to use the OpenAI-compatible path to the model via the configured OPENAI_API_BASE.