T3 Code
Open-source "agent harness control surface" (github.com/pingdotgg/t3code) for running and reviewing Claude Code, Codex, Cursor, Grok Build, OpenCode and Google Antigravity agents from one desktop, web or mobile app, using the subscriptions you already have.
Coding agent control plane · Pricing: Free and open source (MIT); uses your existing agent subscriptions
Pros
- Drives six agent harnesses from one UI; doesn't resell tokens
- Each agent thread writes to its own branch; one button commits, pushes and opens a PR
- iOS and Android companion apps plus T3 Connect for remote control from your phone
- MIT licensed, so you can fork and self-host it
Cons
- Very early: the README says to expect bugs (latest stable release v0.1.6, Oct 31, 2026)
- Needs at least one supported agent CLI installed and signed in
- Mostly not accepting outside contributions yet
Recent changes
- 2026-10-31 T3 Code, the open-source control plane for Claude Code, Codex, Cursor, Grok Build, OpenCode and Antigravity agents, ships v0.1.6 and passes 40,000 GitHub stars. Source
Ranked in
Alternatives to T3 Code
- Cursor (AI code editor)
- Devin Desktop (formerly Windsurf) (AI code editor)
- Google Antigravity (Agent-first coding app)
- Kiro (Spec-driven coding agent)
- GitHub Copilot (AI coding assistant)
- OpenCode (Open-source coding agent)
FAQ
What is T3 Code?
T3 Code is a coding agent control plane. Open-source "agent harness control surface" (github.com/pingdotgg/t3code) for running and reviewing Claude Code, Codex, Cursor, Grok Build, OpenCode and Google Antigravity agents from one desktop, web or mobile app, using the subscriptions you already have.
How much does T3 Code cost?
Free and open source (MIT); uses your existing agent subscriptions. BuildJury only states prices confirmed on the official pricing page; check https://t3.codes for current plans.
What is T3 Code best for?
BuildJury ranks T3 Code for: Agent-first IDEs (#4), Open-source coding agents (#4).
What are the downsides of T3 Code?
Very early: the README says to expect bugs (latest stable release v0.1.6, Oct 31, 2026). Needs at least one supported agent CLI installed and signed in. Mostly not accepting outside contributions yet.