Which AI coding agent is free?

OpenAI Codex is the only one of the big three with a genuine free tier. Cursor has a free Hobby plan but doesn't publish its limits. OpenClaw is free software, though you pay for the model tokens. Claude Code has no free tier, and Gemini CLI lost its own on June 18, 2026.

What's the best AI for coding?

There isn't one. It depends on what you already pay for: ChatGPT means Codex, Claude Pro or Max means Claude Code, coming from VS Code and wanting a GUI means Cursor. Distrust any comparison that names a single winner without asking about your context.

Is Claude Code the best coding agent?

It goes furthest without supervision on large repositories, and that's a real advantage. But it's proprietary, has no free tier, only runs Anthropic models, and doesn't publish its usage limits. "Best" depends on how much those four things weigh in your case.

What are the best alternatives to Claude Code?

OpenAI Codex is the direct alternative (same format, free tier, Apache-2.0 CLI). If you need a genuinely open license, OpenClaw or Gemini CLI with a Code Assist license. If you prefer a GUI, Cursor.

What is an open source AI agent?

One whose code you can read, modify, and run under an OSI license. Watch the nuance: Codex has an open CLI but a closed service, and Gemini CLI is Apache-2.0 but you can no longer use it for free. Open and free are different things.

How does a coding agent work?

It receives an instruction, reads the relevant project files, plans the changes, edits the code, runs commands (tests, build, git), and evaluates the result. If it fails, it iterates. Almost all of them ask for approval before destructive actions, but they run with your user permissions.

Are coding agents worth it?

If you already know how to code, yes: they save serious time on mechanical work. If you're learning, they're worth it only with rules of use: see the section above, because used badly they remove exactly the practice you need.

Is it illegal to code with AI?

No. What does carry legal consequences is what you do with the output: check the license of the code it generates, your company's policy on uploading code to third-party services, and, if the project belongs to a client, what you signed. None of that is exclusive to AI.

Can I run several agents at once?

Yes, and it's increasingly common. It's the problem orchestrators like Xirp solve by isolating each session in its own git worktree. You can also do it by hand with `git worktree`, no install required.

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