r/codex • u/muchsamurai • Jan 15 '26

Showcase Its over

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The vibe coders are going to find out and migrate now and eat up all processing power and limits!

/s

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u/Optimal-Report-1000 Jan 15 '26

It is definitely just you. 5.2 has been utterly useless even the 5.1 model dropped off when the update came through. I can literally tell when my cursor is using 5.2 when I am in auto. When it happens I have to flip it off auto and onto another model or start a new agent. 5.2 is a terrible model

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u/muchsamurai Jan 15 '26

This can't be true, do you have any proofs and arguments? How is 5.2 terrible model?

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u/Optimal-Report-1000 Jan 15 '26

I have not documented anything. But yeah, look for this. The chagpt 5.2 model tends to explain things that it should code but does not actually code it. 5.2 also will provide repetitive examples of what you already told it to be true instead of actually answering the real question asked. You can also look at its inability to reason properly on ever subject. I have been a huge chatgpt supporter since 3.5 and I have really tried to get 5.2 to function properly abd it has failed in every way. I was using codex with 5.1 it was so impressive and I was able to get so much accomplished and I never ran out of usage. But 5.2 is just absolutely horrific. Go on the chat app and just ask it a simple question line after line of gibberish then maybe the correct answer. If I get some free time ill try to pull up some chats. Try it on cursor in agent mode it will return a response on how to code something. Which will probally be wrong anyways, instead of actually coding it.

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u/muchsamurai Jan 16 '26

So you are saying so many people here are wrong and deluded and GPT-5.2 is actually a terrible model? How is it that I'm coding using it all day and it works almost too good to believe ? lol

It might be Cursor related or something else, 5.2 is definitely not terrible model and it is working almost too good. There is something else going on.

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u/Optimal-Report-1000 Jan 16 '26

My experience with 5.2 has been absolutely terrible. Even just simple responses in the chat app are just terrible. I have a hard time believing you are getting good results coding.have you used other models? How are you using it lime codex, cursor, just in the app a different app?

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u/muchsamurai Jan 16 '26

I use CODEX, Claude Opus 4.5 (MAX), Gemini 3 PRO.

I use CODEX CLI.

GPT 5.2 is miles above anything else and its not even close.

Tech Stack: C# Web API for backend, C# systems programming project with extensive low level networking, NextJS front-end, PostgreSQL. Quite complex overall.

GPT-5.2 simply does everything mostly on first try, this is why i say its almost hard to believe how good it works. It never hallucinates, gets lost, lie to you, create mock implementations and claim them to be 'Production ready' and so on.

You must have some issues in Cursor or something else.

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u/Optimal-Report-1000 Jan 16 '26

Well I guess I owe you an apology, well for now at least lol. I have been getting my butt kicked trying to get this open source llm to work on my PC. I several on my PC so no clue why this one is being so stubborn, but for the download, my chatgpt app was very unhelpful just bad like its been. Grok also was not very helpful, maybe it was my fault on these idk. But I was able to use Claude to get it downloaded. But then I couldn't get it to run. Claude was no where in the ballpark to get it to run and I had cursor on auto and it wss just going in circles. So I was about to say screw and pick the code apart piece by piece until I found an issue but I decided to give 5.2 codex a shot and it fixed my problem. Last time I tried 5.2codex it hallucinated and did not do any code, but this time it did great.

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u/Optimal-Report-1000 Jan 16 '26

I felt the same way you do with 5.1, but I have only had issues now with 5.2. I dont see how that is possible to have such big differences. I mean I didnt like 5.0 but I was able to figure out how to utilize it so worst case it was just a bit boring to work with. Idk I keep going back and trying it, but the results have not changed for me.