How to Configure Claude Code with a Third-Party OpenAI-Compatible API

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Claude Code is a terminal-first coding assistant. It can read a repository, explain code, edit files, run commands, and help with refactors from inside your development workflow. If you want to use it with a third-party API gateway, the setup is mostly environment variables. The part that often trips people up is this: Claude Code is not configured like a normal OpenAI-compatible