Two terminal / coding agents, side by side. Facts below link to their sources; last checked 2026-10-17.

Open-source (Apache-2.0) coding agent from OpenAI that runs on your machine. Sign in with ChatGPT or use an API key; also available as IDE extension, desktop app and cloud agent. source

Terminal rebuilt as an agentic development environment: run multiple coding agents, review diffs and edit code alongside your shell. source
Codex CLI: OpenAI's open-source coding agent that runs locally in your terminal. Warp: Agentic development environment: a modern terminal with built-in coding agents.
Codex CLI: From $20/month (free tier available). Warp: From $20/month (free tier available). Prices change often; confirm on the official pricing pages.