The best agent app ever.
Every coding agent in one calm app, on the subscriptions you already pay for.
What people say
Tolerated by over 500,000 devs.
“It's like Claude Code if they didn't vibe-code the entire thing”
@DavidKPiano“...I don’t have a horse in this race, so believe me when I say T3 code is freaking transformational.”
@QuinnyPig“Omarchy is going to ship with an installer for T3 Code because it's a cool project...”
@dhh“Since I've started using T3 Code I no longer care which harness is used”
@MichaelArnaldi“I would just use T3 Code at that point and contribute back.”
@tannerlinsley“It takes what I liked so much about codex’s remote setup and improves upon it”
@RhysSullivan“I can't believe my favourite gui is built by a YouTuber and a Swedish guy named Julius”
@Rasmic“T3 Code is miles ahead of anything else i've tried”
@AtharvaIngle7“It is the most sane version of an agent orchestrator that I've used”
@appfactory“...gym app misses some exercises. So I launch a T3 Code thread and ship updates as I train.”
@linuz90“T3 Code is proof electron apps don't have to suck”
@ex0t1clol“T3 Code with connect in just a web browser is so killer I love it so much”
@mweinbach“I think I've finally found the one AI harness to steal me away from the terminal”
@ryanrhughes“...with t3 everything just works as expected and on my first try!”
@PavolRusnak“...I am in awe about how it connects to a remote VM seamlessly with no Tailscale”
@amritwt“Heartbreaking: AI-hater has to admit T3 Code is really good.”
@_winter_wonders“...it’s great especially if you have many subs and many machines to manage.”
@szdziedzic“I was 2,000 miles away on holiday and able to do iOS development from just my phone”
@JoshuaRileyDev“...got the terminal in t3 code so good that you can use advanced TUIs inside it is insane to me”
@pcstyle53“If you tried it once and bounced, give it a second chance.”
@serhiyhvala
FAQs
How much does T3 Code cost?
Nothing. T3 Code is free and open source under the MIT license. You keep paying your provider like you already do, and T3 Connect is free for up to 3 machines.
Can I use my Claude Code or ChatGPT subscription?
Yes. T3 Code runs Claude Code, Codex, Cursor, Grok Build, OpenCode, Antigravity, Pi and Muse Code on the plans you already pay for.
Will I get banned for using my subscription?
No. T3 Code stays within the terms of Claude Code, Codex and Google Antigravity, and the Grok Build and Cursor integrations were built with their teams.
Is T3 Code a harness?
No. Harnesses like Claude Code and Codex turn a model into an agent. T3 Code is the app you run them in, so you can switch between them without changing how you work.
Does my code go to T3 servers?
No. Your code and prompts go from your machine straight to your provider. T3 Code sends basic usage events, never prompts or file contents, and you can turn those off.
Can I use it from my phone or another computer?
Yes. Your agents run on the machine with T3 Code. Connect to it from the iOS or Android app or app.t3.codes, through T3 Connect, Tailscale or your local network.
Does it work on Windows, Mac and Linux?
Yes, all three, as a desktop app or the t3 command.