Open sourceTypeScript · ≈31k stars · MIT
T3 Code
Open-source control plane for running multiple coding agents from one interface.
T3 Code, made by T3 Tools Inc., is an MIT-licensed GUI that drives existing coding-agent CLIs (Claude Code, Codex CLI, Antigravity, OpenCode, Cursor, Grok CLI) from a single app, using the user's own subscriptions rather than reselling tokens. Each agent thread writes to its own branch; inline diff review and a one-click commit/push/open-PR flow with generated descriptions close the loop. It runs on desktop with iOS and Android companion apps and is designed to be forked and customised.
Pros & cons
Each point cites its sources and says what kind of evidence backs it. A second reviewer tried to refute every claim before it was kept.
Pros
- DocsOne GUI drives the Claude Code, Codex, Cursor, Grok Build, OpenCode and Antigravity subscriptions already set up on your machine, and the README says it costs nothing.[1]
- DocsShips iOS and Android remote-control apps, a web app, and Homebrew, winget, scoop, .deb and nixpkgs packages.[1]
- User reportsA user who switched from cmux praises default worktree spawning, inbox-style threads, steer/queue messages and the built-in mini browser.[1]
- MetadataMIT-licensed and shipping fast (v0.1.5 released 2026-10-29).[1]
Cons
- DocsThe README says it is 'very very early', to expect bugs, that there is no docs site yet, and that big outside features will not be accepted.[1]
- User reportsUsers measured Claude usage about 3-5x higher than in the native app (a 71-comment issue). The maintainer traced it to Anthropic metering Agent SDK traffic, which T3 Code uses, at a higher rate.[1]
- User reportsFast churn: maintainers required an Orchestrator V1-to-V2 migration in October 2026, and users reported T3 Connect relay 504s and failed managed-endpoint setup on Windows 11.[1][2][3]
- MetadataAbout 1,340 open issues on a repo created in February 2026.[1]
- Best for
- Developers who switch between several CLI coding agents and want a polished desktop and mobile front end over their own subscriptions.
- Watch out for
- Its token usage can differ from the native agent, so compare quota burn before moving heavy work onto it.
Assessed Oct 29, 2026 · adversarially reviewedSuggest a correction
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Connections
Relations from the Harness Hub knowledge graph, as charted in the State of Harness reports.
Maintained by · 1
- T3 ToolsOrganisation
Built on · 1
- CodexProject
Sources
Verified Oct 29, 2026