opencodex

Open-source local proxy that runs Codex and Claude Code on any LLM — 40+ providers, zero client patches.

Open Source Coding & Development
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What is opencodex?

opencodex is an independent, open-source local proxy that lets you run Codex and Claude Code against any LLM provider instead of being locked to one. It translates each wire format — streaming, tool calls, reasoning, and images — across 40+ providers like Anthropic, Google, xAI, Kimi, DeepSeek, and Ollama. Features include OAuth or API-key login, ChatGPT account pooling with quota-aware routing, failover model combos, and a desktop dashboard in beta.

Key features

  • Local proxy serving Codex and Claude Code from one port
  • 40+ built-in LLM providers (Anthropic, Google, xAI, Kimi, DeepSeek, Ollama)
  • Streaming, tool calls, reasoning tokens, and images translated bidirectionally
  • OAuth or API-key login — no client patches needed
  • ChatGPT account pooling with quota-aware routing
  • Model combos with failover or weighted round-robin
  • Sub-agent model pinning (up to five models)
  • Search and vision sidecars for non-OpenAI models

Pros

  • Frees coding agents from single-provider lock-in
  • Zero client patches — Codex and Claude Code work natively
  • Desktop dashboard plus simple npm install workflow
  • Active open-source project with MIT license

Cons

  • Requires a provider API key or account login of your own
  • Third-party proxying may violate some providers' Terms of Service
  • Beta desktop app installers are not yet code-signed

opencodex at a glance

PricingOpen Source
CategoryCoding & Development
Platformsweb, windows, macos, linux
Official websiteopencodex.me
open-sourcecoding-agentllm-proxycodexclaude-codemulti-modelmitdeveloper-tools

How to choose the right Coding & Development tool

The right coding tool depends on where you write code and how much of your codebase it can understand. IDE integration is the first filter — a tool that lives in your editor, sees your project files and respects your stack will help far more than a general chatbot you paste snippets into. Look for accurate completions, clear explanations of suggested changes, and strong refactoring and debugging support for your main languages. Privacy deserves real attention: check whether your code is used for training, and whether a self-hosted or enterprise option exists for sensitive projects. Price against the hours it actually saves — most developers feel the difference within the first week of real use.

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opencodex FAQs

What is opencodex?

opencodex is an independent, open-source local proxy that lets you run Codex and Claude Code against any LLM provider instead of being locked to one. It translates each wire format — streaming, tool calls, reasoning, and images — across 40+ providers like Anthropic, Google, xAI, Kimi, DeepSeek, and Ollama. Features include OAuth or API-key login, ChatGPT account pooling with quota-aware routing, failover model combos, and a desktop dashboard in beta.

What are the main features of opencodex?

opencodex offers Local proxy serving Codex and Claude Code from one port, 40+ built-in LLM providers (Anthropic, Google, xAI, Kimi, DeepSeek, Ollama), Streaming, tool calls, reasoning tokens, and images translated bidirectionally, OAuth or API-key login — no client patches needed, ChatGPT account pooling with quota-aware routing, Model combos with failover or weighted round-robin, Sub-agent model pinning (up to five models) and Search and vision sidecars for non-OpenAI models.

How much does opencodex cost?

opencodex is open source, so the software itself is free to download, use and self-host. Your only costs are the infrastructure you run it on and any paid services you connect to it.

What are the pros and cons of opencodex?

Strengths of opencodex include Frees coding agents from single-provider lock-in; Zero client patches — Codex and Claude Code work natively; Desktop dashboard plus simple npm install workflow. On the downside, Requires a provider API key or account login of your own; Third-party proxying may violate some providers' Terms of Service; Beta desktop app installers are not yet code-signed.