Use Redline with Aider

Aider reaches an OpenAI-compatible endpoint through the OPENAI_API_BASE variable and an openai/ model prefix. Set both and Aider talks to Redline.

Set the base URL and prefix the model

# Windows (new shell required after setx)
setx OPENAI_API_BASE https://redline-gateway.pages.dev/v1
setx OPENAI_API_KEY rl-...

aider --model openai/deepseek/deepseek-chat-v3.1

Or put it in .aider.conf.yml:

model: openai/deepseek/deepseek-chat-v3.1
openai-api-base: https://redline-gateway.pages.dev/v1
openai-api-key: rl-...
The openai/ prefix is required Aider routes on the model prefix. Without openai/ it does not know to use OPENAI_API_BASE. Aider may warn "Unknown context window size"; add a .aider.model.metadata.json entry or pass --no-show-model-warnings.

Related guides

Claude CodePoint Claude Code at Redline through the Anthropic-compatible endpoint and run DeepSeek, Qwen, Kimi, GLM and more, with a hard spend cap on the key. Claude Agent SDK (TS)Run the Claude Agent SDK for TypeScript against Redline by passing the Anthropic base URL and auth token through the query env option. Claude Agent SDK (Python)Run the Python Claude Agent SDK against Redline by passing the Anthropic base URL and auth token through ClaudeAgentOptions env. Anthropic SDK (Python)Use the anthropic Python SDK against Redline by setting base_url to the Anthropic-compatible endpoint and passing your key as auth_token.

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