Independent workflow comparison
T3 Code controls coding agents set up on your machine. Sandpi gives long-running Codex work a persistent workspace and sandbox in the cloud. Both can help you work with agents away from a terminal, but they keep the work in different places.
The short answer
Choose T3 Code when
T3 Code is an open-source control surface for agent CLIs you already run and authenticate. It is a strong fit when you want to keep provider access, repositories, and execution under your own machine or server.
Read T3 Code's public documentationChoose Sandpi when
Sandpi is built for repository work that needs a real workspace, terminal, sandbox, and enough continuity to investigate, make a change, and come back later to the same state.
Explore Sandpi's workspace featuresThe important distinction
This is not a browser-versus-desktop comparison. T3 Code has web, desktop, and mobile surfaces. The practical question is where the repository, terminal, provider session, and agent's ongoing work remain when you step away.
T3 Code
The agent runs where you have installed it. Remote access can extend the interface, while your host remains responsible for the working state.
Sandpi
The workspace, agent session, and tools stay together in the remote environment, so the task can remain available when the browser connection changes.
T3 Code vs. Sandpi
| Workflow question | T3 Code | Sandpi |
|---|---|---|
| Where agent work runs | On the computer or server where you set up T3 Code and the provider CLI. | In a Sandpi cloud environment with a workspace and sandbox available from the browser. |
| How state persists | Your machine or self-managed host remains the place that holds the repository, terminal, and provider session. | The environment keeps the workspace and native session together so you can reconnect after leaving the browser. |
| Agent access | Controls provider CLIs you have already installed and authenticated, including Codex and other supported harnesses. | Current public product guidance describes a native Codex account connection inside the remote environment. |
| Best fit | You want an open-source control surface around the agents and machine you already operate. | You want a durable, isolated place for a substantial Codex task to keep running beyond one local session. |
Start from the task
Use T3 Code when the repository and provider setup already belong on a machine you operate, and you want a flexible control surface around that setup.
Use Sandpi when the work needs an isolated repository, terminal, browser workspace, and persistent session that do not depend on keeping your local machine session open.
If you need both an interface and remote continuity, decide first who should operate the host and hold the agent's state. That answer is more useful than a generic feature checklist.
Questions to ask
Not across every workflow. They overlap when you want to direct coding agents away from a bare terminal, but T3 Code focuses on controlling agents on your host while Sandpi focuses on a persistent remote environment for the work itself.
No. T3 Code documents remote-ready web, desktop, and mobile access. The distinction here is that its public documentation describes controlling agents set up on your computer; remote access does not turn it into Sandpi's managed workspace model.
Do not assume that. Sandpi's current public guidance explicitly describes a native Codex connection. Verify current provider support before choosing a workflow that depends on another harness.
T3 Code is a third-party product. This independent comparison is based on public product documentation checked on August 1, 2026 and does not imply affiliation, endorsement, or support.
Persistent agent work