This guide shows you how to install and run OpenAI’s Codex CLI inside Termux on Android, using the DioNanos/codex-termux fork (bionic-compatible), with full support for:
- Shell tool execution
- OpenRouter models (Grok, Claude Opus, GPT-5, Gemini, etc.)
- A dynamic fzf launcher that auto-detects all
[profiles.*]in your Codex config - Clean
.env-based secret handling - Automatic model switching