Aider

Use Aider with Lightweight for AI pair programming with any model.

Aider is an AI pair programming tool that works in your terminal. Connect it to Lightweight to use any model in the catalog.

CLI Command

The quickest way to use Aider with Lightweight is to pass the configuration flags directly:

aider --openai-api-base https://api.lightweight.one/v1 \
      --openai-api-key lw_sk_your-key-here \
      --model openai/claude-sonnet-4.5

Aider requires the openai/ prefix when using OpenAI-compatible providers. For example, use openai/claude-sonnet-4.5 instead of claude-sonnet-4.5.

Environment Variable Alternative

If you prefer not to pass flags every time, set environment variables:

Bash / macOS / Linux

export OPENAI_API_BASE="https://api.lightweight.one/v1"
export OPENAI_API_KEY="lw_sk_your-key-here"

aider --model openai/gpt-5.4

PowerShell / Windows

$env:OPENAI_API_BASE = "https://api.lightweight.one/v1"
$env:OPENAI_API_KEY = "lw_sk_your-key-here"

aider --model openai/gpt-5.4

You can switch models on the fly by changing the --model flag. Browse all available models on the Models page.