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Codex 5.3 extra-high is so good its nuts

also way faster than 5.2
180 onyx useless brakes immigrant
  02/06/26
what do you use it for
mischievous market pocket flask
  02/06/26
AI-related development. I just used it on extra high mode an...
180 onyx useless brakes immigrant
  02/06/26
The SWE Bench Pro graph with number of tokens vs. accuracy i...
electric lilac tanning salon
  02/06/26
I got into the alpha for the codex app This thing is amaz...
Adventurous Effete Crotch
  02/06/26
its so 180. I have heard people complain that its an electro...
180 onyx useless brakes immigrant
  02/10/26


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Date: February 6th, 2026 12:25 AM
Author: 180 onyx useless brakes immigrant

also way faster than 5.2

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49650246)



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Date: February 6th, 2026 12:25 AM
Author: mischievous market pocket flask

what do you use it for

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49650249)



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Date: February 6th, 2026 12:31 AM
Author: 180 onyx useless brakes immigrant

AI-related development. I just used it on extra high mode and it edited (and created some new unit tests) 14 files in one shot, and fixed it to a quality level that would have taken like 12 rewrites with codex 5.2. plus it was like twice as fast.

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49650256)



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Date: February 6th, 2026 1:37 AM
Author: electric lilac tanning salon

The SWE Bench Pro graph with number of tokens vs. accuracy is interesting. At the limit, it converges on 5.2 codex max. Models are now becoming more token efficient, but not necessarily developing new capabilities?

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49650280)



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Date: February 6th, 2026 1:48 AM
Author: Adventurous Effete Crotch

I got into the alpha for the codex app

This thing is amazing

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49650289)



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Date: February 10th, 2026 2:04 PM
Author: 180 onyx useless brakes immigrant

its so 180. I have heard people complain that its an electron app and that developers won't use it. but whats funny is I normally do almost everything headless but now that this app is out i just want to do everything on here. and speed and scale aren't really an issue. its fast enough and in terms of scale the credits are enough if I wanted to add more compute and more complex automation it would just get out of control and I'd have no idea what the hell is going on in my codebase. the credits on pro are enough. i could probably push it past the limits but i just would lose track of whats happening

(http://www.autoadmit.com/thread.php?thread_id=5831622&forum_id=2Reputation#49661179)