OpenAI Codex runs coding tasks in parallel cloud sandboxes, returns diffs and test citations for review, and integrates across CLI, IDE, and ChatGPT.
Aider
Aider is a free, open-source terminal AI coding agent. Works with any LLM, auto-commits to Git, and requires no subscription.
Gemini CLI
Gemini CLI is an open-source terminal coding agent built by Google under the Apache 2.0 license. Written in TypeScript, it launched in June 2025 and accumulated 104,000+ GitHub stars within a year. Google shut down free, Pro, and Ultra access to Jules on June 18, 2026, redirecting consumer users to Antigravity CLI, a closed-source Go-based […]