How to Connect OpenCode to Any LLM Provider Using One API Key

OpenCode is an open-source AI coding agent designed for the terminal, offering developers flexibility and control by supporting over 75 language model (LLM) providers, making it a viable alternative to tools like Claude Code and GitHub Copilot. While this flexibility is a significant advantage, managing multiple API keys and configurations for different providers can be cumbersome and prone to errors. An AI gateway, such as Eden AI, LiteLLM, or OpenRouter, streamlines this process by acting as a unified API layer that handles routing, credentials, and format translation, allowing developers to manage one configuration instead of multiple. Eden AI, in particular, offers a managed cloud solution with automatic fallback, per-request cost tracking, and EU-hosted infrastructure, making it a preferred choice for those needing compliance with data residency requirements like GDPR. In contrast, LiteLLM is suitable for those requiring self-hosting and infrastructure control, while OpenRouter provides a broad model catalog with transparent pricing. This setup allows seamless switching between providers like Claude, GPT-4o, and Gemini without reconfiguration, enhancing efficiency and reliability for developers using OpenCode.