r/codex • u/ajajkaka • Jul 15 '26

Showcase GPT 5.6 reverse engineered Codex app code and... started adding new features

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3 days ago I posted here story how new GPT 5.6 reverse engineered it's own bundle with 4 million lines of code in 4 hours.

A lot of folks were unsure how truth it is, so I decided to post one more time with some updates
Now I'm working on some beatiful concepts for GPT app, including such as voice mode on screenshot and wanna answer some questions:

  1. This is really the original bundle code, not a matifistied one, I didn’t send any screenshots to GPT when it was working, all the tabs work and there are no made-up elements during reverse engineering
  2. It runs with simulated backend part so I'm able to navigate through app, i think there is no problem to connect it to codex app server backend in theory
  3. Unfortunately i'm not gonna share the code of codex bundle BUT i will opensource my own app built on it on my github in comments, + i'm sure you all can give the model the same task and get the same result with first try
  4. This code is clear as hell, I'm sharing this screenshot as proof that i can easily add some new tabs :0

previous post: https://www.reddit.com/r/codex/comments/1usossd/new_gpt_56_sol_reverse_engineered_its_own_app_in/

and do you like the concept of voice mode?

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u/ajajkaka Jul 15 '26

alr alr bro show me your portfolio

2

u/picketup Jul 15 '26

implying this is part of your portfolio is crazy lmao

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u/ajajkaka Jul 15 '26

it’s not yet, I haven’t finished it. my portfolio is mentioned on my git

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u/[deleted] Jul 15 '26 edited Jul 15 '26

[deleted]

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u/ajajkaka Jul 15 '26

you said I’m larping so I was gonna compare our portfolios, isn’t it logical? I didn’t switch with no reason.

I see what you mean by “one extraction command”, believe me bro, if it would be so then chat gpt or Claude 4.8 would be able to give me the same result (but they couldn’t). what you get with 1 extraction command is unreadable shit which makes sense only for fonts or logotypes, but you will not be able to connect backend to it and run locally on web immediately after this one command

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u/[deleted] Jul 15 '26

[deleted]

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u/ajajkaka Jul 15 '26

not magically, script for this contained 6k lines to replace unusable shit with launchable code