insightflo

insightflo / chatgpt-codex-proxy

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An Anthropic-compatible /v1/messages proxy that lets Claude Code use the ChatGPT Codex backend.

anthropic api-proxy chatgpt claude claude-code
29
6
80% credibility
Found Mar 02, 2026 at 29 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
TypeScript
AI Summary

This project is a local compatibility layer that lets users access ChatGPT's Codex coding features through an Anthropic Claude-like interface.

How It Works

1
🔍 Discover the coding bridge

You hear about a simple way to bring ChatGPT's powerful coding abilities into your Claude coding assistant.

2
📥 Bring it home

You download the helper tool to your computer and get it ready in a few moments.

3
🔐 Sign in easily

A web browser pops open so you can log into your ChatGPT account with Plus or Pro – quick and secure.

4
▶️ Turn on the helper

You launch the helper with one easy action, and it runs quietly on your machine.

5
🔗 Connect your assistant

You update your Claude coding app to point to the helper, like giving it a special address.

6
💻 Start coding magic

Now you chat with Claude, and it taps into ChatGPT's coding smarts for better results.

🎉 Code like a pro

You enjoy seamless, powerful coding help right where you love to work, with tools and suggestions flowing perfectly.

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Star Growth

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AI-Generated Review

What is chatgpt-codex-proxy?

This TypeScript-built chatgpt codex proxy creates an anthropic-compatible /v1/messages endpoint that lets Claude Code tap into the ChatGPT Codex backend. Developers point their Anthropic clients—like Claude tools—at localhost:19080, and it handles OAuth login via CLI, request/response transforms, and streaming over SSE. It solves the mismatch between Claude's API expectations and ChatGPT's Codex models, enabling seamless code generation without switching providers.

Why is it gaining traction?

It stands out with dead-simple setup: run `npm run login` for ChatGPT Plus auth, `npm run dev` to spin up the proxy, and set `ANTHROPIC_BASE_URL` to use it. Key hooks include automatic Claude-to-Codex model mapping, full tool calling roundtrips, and passthrough mode for custom models—all while preserving multi-turn chats and limited image inputs. No vendor lock-in; just bridge the backends for better code-focused responses.

Who should use this?

Claude Code users with ChatGPT Plus/Pro subscriptions experimenting with Codex models like gpt-5.2-codex for faster local coding sessions. AI agent builders needing an Anthropic API drop-in backed by ChatGPT for tool-heavy workflows. Devs testing hybrid setups before committing to one provider's ecosystem.

Verdict

Grab it for local Claude-Codex hacks if you have the sub—solid docs and CLI make it plug-and-play, though 29 stars and 0.800000011920929% credibility signal early-stage maturity; test tool calling thoroughly. Skip for production without adding auth and rate limits.

(187 words)

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