A 4.7MB portable, bring-your-own-model desktop workbench for AI coding. Open a folder — the main area is a real terminal — split it and run multiple Claude Code / Codex CLIs in parallel. No bundled keys, no server; point it at any OpenAI/Anthropic-compatible endpoint. Tauri 2 + React, reuses the system WebView (no 200MB Electron).

Hey PH 👋 I built OpenCodex to scratch my own itch: open a project folder, split the view into several terminals, and run multiple Claude Code / Codex sessions side by side — without a 200MB Electron app. It's folder-based: the main area is a real terminal, split left/right or top/bottom, run as many AI CLIs as you want. Splitting only repositions panes so a running session is never killed; closing a pane kills the whole child process tree (no orphans). ~4.7MB (Tauri 2, reuses the system WebView), bring-your-own-model — no bundled keys, no server, any OpenAI/Anthropic-compatible endpoint. Early Demo, I use it daily. Feedback on what to add next very welcome 🙏 https://github.com/dongsheng1231...

Love that it reuses the system WebView instead of bundling Electron, getting the whole thing under 5MB feels almost rebellious. The split terminal for running multiple CLIs side by side is exactly the kind of no-nonsense feature I want.

OpenCodex

Run multiple Claude Code sessions in split terminals

Run multiple Claude Code sessions in split terminals