4h ago

Theo Browne, creator of the T3 Stack, says OpenAI's Codex app outperforms competing agentic coding tools thanks to internal usage, reliability, and mobile-git integrations

Greg Brockman quote-posted the assessment on X.

0
Original post

Subtext: every other "agentic coding app" is kind of trash right now. It's insane that only OpenAI is shipping something of this quality. It's clear they actually use it internally. I honestly believe T3 Code is the only thing close to the quality of Codex.

4:19 PM · May 19, 2026 View on X

codex app is very good

Theo - t3.ggTheo - t3.gg@theo

Honestly I'm still really impressed with the Codex app. It works reliably. It adds useful features consistently. It has taste. The mobile integration is awesome. The git integration is solid. If you haven't used it yet, I highly recommend it.

11:18 PM · May 19, 2026 · 205K Views
11:40 PM · May 19, 2026 · 63.1K Views

Mobile app did this to me.

Btw some feedback (too lazy to dm on slack): - I should be able to control a remote pc from both phone and desktop app - I should be able to tell codex to "grab this from github and make a project" on mobile (had to remote in and do this myself) - "Projects" don't sync properly between desktop and mobile. Saw like 8 projects on desktop app and 0 on mobile - Projects don't appear on mobile until a thread is made 🙃

Keep grinding 🫡

TiboTibo@thsottiaux

What happened to Theo. Who did this to him

2:00 AM · May 20, 2026 · 71.1K Views
2:03 AM · May 20, 2026 · 10.1K Views

@thsottiaux Learned I have to separately set up "connections" from the mobile stuff. Weird these are different primitives. Annoying to juggle in my head

Theo - t3.ggTheo - t3.gg@theo

Mobile app did this to me. Btw some feedback (too lazy to dm on slack): - I should be able to control a remote pc from both phone and desktop app - I should be able to tell codex to "grab this from github and make a project" on mobile (had to remote in and do this myself) - "Projects" don't sync properly between desktop and mobile. Saw like 8 projects on desktop app and 0 on mobile - Projects don't appear on mobile until a thread is made 🙃 Keep grinding 🫡

2:03 AM · May 20, 2026 · 10.1K Views
3:03 AM · May 20, 2026 · 1.1K Views
Theo Browne, creator of the T3 Stack, says OpenAI's Codex app outperforms competing agentic coding tools thanks to internal usage, reliability, and mobile-git integrations · Digg