Opencodex: A universal proxy to run Claude Code and OpenAI Codex with any LLM
The open-source project opencodex has been released, providing a TypeScript-based universal proxy that allows developers to connect Claude Code and OpenAI Codex clients to any LLM provider. This enables the use of alternative models such as Gemini, Grok, DeepSeek, and local models via Ollama. This tool gives developers the flexibility to bypass vendor lock-in, allowing them to use advanced coding CLI tools and agents with cheaper, local, or alternative AI models instead of being restricted to official APIs. Written in TypeScript, Opencodex acts as an intermediary that translates API requests between Codex/Claude Code clients and various LLM backends. It supports integration with major providers including Anthropic, Google Gemini, xAI Grok, DeepSeek, and local deployments via Ollama.
## BACKGROUND
Claude Code and OpenAI Codex are specialized tools designed to assist developers by automating software engineering tasks like writing, refactoring, and reviewing code. Typically, these tools are tightly integrated with their respective creators' proprietary APIs, which can limit developers who prefer using alternative or local models.