T3 Code is an Open Source GUI and Control Plane for AI coding agents, developed by T3 Tools Inc. (the team around Theo Browne/t3.gg, repository pingdotgg/t3code). The tool is not an AI model itself, but orchestrates existing agent CLIs such as Claude Code, Codex, Cursor, Grok, OpenCode, and Antigravity through a unified interface for desktop, web, and mobile. It follows a "bring-your-own-subscription" model: users connect their own pre-paid agent accounts without T3 Code reselling Tokens or offering its own subscription. Since late September 2026, T3 Code has also been a launch partner of OpenAI's "Sign in with ChatGPT" feature, which makes ChatGPT quotas directly usable within the tool.

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