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T3 Code is a free, open-source app that brings coding agents such as Claude Code, Codex and Cursor into one interface. It can organize work in separate Git branches and let users review and open pull requests from the same workspace, while providers continue to bill users under their existing plans.
T3 Tools’ T3 Code brings several AI coding agents into one workspace, letting developers run tools such as Claude Code, Codex and Cursor without replacing the subscriptions they already use. The free, open-source app also organizes tasks into separate Git branches and provides a shared place to review changes, a setup aimed at developers managing multiple agents or working across devices.
T3 Code is an interface for coding tools that developers have installed and authenticated separately. The project describes it as a “control plane” for coding agents: it connects to their existing harnesses, the software that gives a model access to files and commands, instead of supplying a new model or harness of its own. Its homepage lists Claude Code, Codex, Antigravity, OpenCode, Cursor and Grok; an installation guide listed 10 providers on November 8, including Kiro, Pi, Muse Code and fx.
The app is available for macOS, Windows and Linux, with web, command-line server and mobile options. Agents run on a selected machine, such as a laptop, desktop or server; other devices can connect to that machine. Users can create a thread for a task, assign it a Git branch and working folder, and inspect the resulting diff. T3 Code also offers actions to commit, push and open a pull request from the same interface.
The project says it does not resell model tokens or charge for use. Users sign in through the relevant provider, which continues to apply its own billing and plan limits. The app includes a usage page with token data across agents, but its documentation says cost figures are API-equivalent estimates, not a statement of the user’s subscription bill. The project’s version was 0.1.7 on November 4, according to the source material.
T3 Code unites your coding agents
T3 Code brings existing AI coding tools into one workspace. Developers can organize agent tasks, review changes and work across devices while keeping their provider accounts and plans.
One workspace, familiar agents
The app connects to tools developers install and authenticate separately.
Bring existing tools
Claude Code, Codex, Cursor and other providers can share one interface.
Keep tasks organized
Give a task its own thread, Git branch and working folder, then inspect the diff.
Review and ship
Commit, push and open pull requests from the same workspace.
How work moves through T3 Code
Install and sign in to the coding agent on the machine where it will run.
Create a thread and choose its branch and working folder.
Review the diff, then commit, push or open a pull request.
What it handles—and what stays with providers
- Shared interface for coding agents
- Threads, branches and diff review
- Usage page with token data
- Authentication and plan limits
- Billing under existing accounts
- Actual subscription costs
Check the setup before relying on it
Early version and provider behavior may affect how well it fits a team’s workflow.
- Confirm provider support, sign-in needs and platform options.
- Review thread permissions and branch behavior before assigning work.
- Treat API-equivalent cost figures as estimates, not subscription bills.
One Workflow Across Coding Agents
For developers using several assistants, separate applications can make it harder to compare results and keep track of which tool changed which files. T3 Code’s shared thread and diff view could make it easier to assign different agents to a task, inspect their work and switch agents during a project. Separate branches can also help keep concurrent tasks apart in Git.
The potential benefit depends on how people already work. A developer who uses one agent in one terminal may gain little from another interface. For teams or individuals juggling multiple tools, the appeal is a shared workflow while keeping provider accounts and billing in place. The app’s usage estimates may help compare activity, though they do not show the actual subscription cost.
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AI coding products often bundle a model with a harness that lets it read project files, run commands and propose edits. T3 Code takes a different role: it brings existing harnesses together in one interface. Its FAQ says the app is neither the model nor the harness; the project’s description is that it provides a common surface for them.
The source material identifies the project as free and open source under the MIT license. It reported 51,990 GitHub stars on November 8, 2026, while the homepage rounded that figure to “51k+.” The site also claimed more than 500,000 developers use the app; that audience figure was not independently verified in the source material.
Authentication varies by provider and takes place on the machine running the agents. The installation instructions describe commands or sign-in flows for services including Claude Code, Codex and OpenCode, with Google sign-in for Antigravity. Users can also add a provider using API keys or OpenRouter, according to the project FAQ.
“The open-source control plane for coding agents.”
— T3 Code homepage
Limits and Adoption Still Need Testing
The project is at an early version, 0.1.7 as of November 4, 2026. The source material does not establish how reliably every listed provider works across operating systems, or how the app performs when several agents edit related code at once. Those details may matter to developers considering it for shared or production workflows.
Provider terms, authentication requirements and usage limits continue to apply, but the source does not spell out how every provider’s rules interact with remote access through T3 Code. Its usage page reports API-equivalent cost estimates; the source does not say those figures can be reconciled directly with subscription invoices. The claim of more than 500,000 users is also unverified in the material provided.
The source says new threads start in full-access mode unless the user changes the default. It does not detail the precise permissions granted by that mode. Users should review the app’s settings and their provider’s guidance before running agents against a project.
What Developers Should Check
The project’s next steps are not specified in the source material. Developers interested in trying T3 Code can consult its installation guide to check provider support, sign-in requirements and available platform options. Before assigning work, they can review thread permissions, branch behavior and their agent plans’ limits.
As the project develops, useful milestones to watch include changes to the supported provider list, improvements to the shared diff and Git workflow, and clearer documentation of remote access and permissions. Whether the app reduces day-to-day tool switching will depend on how well those features work with users’ existing setups.
Key Questions
What is T3 Code?
T3 Code is a free, open-source interface for managing multiple AI coding agents. It uses providers’ existing tools and harnesses rather than supplying a new model.
Does T3 Code replace my AI subscription?
No. The project says users sign in with their existing provider accounts, which continue to set billing and plan limits. T3 Code says it does not resell tokens.
Which coding agents does it support?
The homepage lists Claude Code, Codex, Antigravity, OpenCode, Cursor and Grok. An installation guide listed 10 providers on November 8, 2026, including Kiro, Pi, Muse Code and fx.
Can I use T3 Code from another device?
The project describes desktop, web, command-line server and mobile options. Agents run on a selected machine, and other devices can connect to it; the source material does not provide further details about remote-access requirements.
Does T3 Code show what my subscriptions cost?
Its usage page combines token activity and provides API-equivalent cost estimates. The documentation says those estimates are not the same as a user’s subscription bill.
Source: Thorsten Meyer AI
