First impressions look good to me, I’m going to test it today Answer from Numerous-Grass250 on reddit.com
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Reddit
reddit.com › r/claudecode › tried codex after all the noise here and i'm hating it profoundly
r/ClaudeCode on Reddit: Tried Codex after all the noise here and i'm hating it profoundly
September 3, 2025 -

I don't know what you all are seeing in Codex, but if Claude Code was magical, Codex really makes me feel uncomfortable and stupid, almost hating vibe coding all of a sudden. If skill issue is a thing, I never had skill issues with CC, but Codex is really bad for no-coders. I'm already planning to refund/cancel GPT-Pro that I bought today to run full testing and keep my CC, crossing my fingers that it stays decent and that Anthropic fixes it.

I loved Claude Code so much that I even introduced it to normie entrepreneurs to implement vibe coding at their companies, and they are loving it. I would have never suggested anyone "normal" use Codex for what it is today.

  1. While I understand a bit of development, Claude Code made me speedrun 20x my knowledge every day I used it. Codex doesn't say anything about what it's going to do, and generates text that is very unpleasant to read - all in one block of often confusing and underspecified final reports.

  2. Zero steering, while having no idea what it is doing. While Claude was trying to hammer a nail with a few misses, Codex is hammering with an electric hammer with my eyes folded. Can't learn, can't understand if my question was correct, just need to wait for the final outcome.

  3. Slow. Reasoning might be decent but it's also very slow. When it doesn't get it or overthinks, it's frustrating. Takes a long time to one-shot, sometimes in the wrong direction.

  4. Zero creative understanding. I've literally struggled and lost time in new sessions giving commands like "merge" that Claude clearly understands, getting me a "merged all your repository into one txt document, here you have it" absurd type of outcomes. It really doesn't get 1-2/10 commands.

  5. No plan mode: Man, I hate not planning. Over the past weeks before things got a bit rough, I was having love sessions where with CC we were planning for 40 minutes and then it executed everything in 10. Codex just doesn't have that: one shot, adapt, one shot, adapt.

  6. No resume: For someone who vibe-coded from the beach using cellphone/iPad/Mac on a Hetzner server, not having resume capabilities feels really like a big struggle. Yes, I used to fear the compacting of a sentence, but I used to continue for days on a 5-times compacted conversation, having multiple at a time, and it was a joy.

  7. UI/UX is very bad overall. I don't like how it talks, how it processes requests, how steering gets too long, how it doesn't teach me anything on the way.

More and more thoughts are growing in me, but this is the experience of someone having spent 16 hours a day in Claude Code for the past weeks and who tried Codex for the past 24 hours with huge frustration and disappointment.

What's your experience trying out Codex for real, and am I the only one really disliking it or is it really a skill issue of having to step up while CC was forgiving and welcoming?

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Reddit
reddit.com › r/claudeai › started using codex today and wow i'm impressed!
r/ClaudeAI on Reddit: Started using Codex today and wow I'm impressed!
August 24, 2025 -

I'm building a language learning platform mostly with Claude Code though I do use Gemini CLI and ChatGPT for some things. But CC is the main developer. Today I wanted to test Codex and wow, I'm loving it. Compared to CC, it is much more moderate, when you ask it to refactor something or modify the UI of a feature it does exactly what you asked, it doesn't go overoboard, it doesn't do something you didn't ask and it does it incrementally so you can always ask it to go one step further. All I've had it do so far has gone smoothly, without getting stuck on a loop, and even the design aspect is very good. I asked to re-design an admin feature and give me 5 designs and I loved all of them. If you haven't tried it, I'd give it a try. It's a great addition to your AI team!

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Reddit
reddit.com › r/chatgptcoding › is codex really that impressive?
r/ChatGPTCoding on Reddit: Is Codex really that impressive?
October 14, 2025 -

So I have been coding with Claude Code (Max 5x) using the VScode extension, and honestly it seems to handle codebases below a certain size really well.

I saw a good amount of positive reviews about Codex, so I used my Plus plan and started using Codex extension in VScode on Windows.

I do not know if I've set it up wrongly, or I'm using it wrongly - but Codex seems just "blah". I've tried gpt-5 and gpt-5-codex medium and it did a couple of things out of place, even though I stayed on one topic AND was using less than 50% tokens. It duplicated elements on the page (instead of updating them) or deleted entire files instead of editing them, changed certain styles and functionality when I did not ask it to, wiped out data I had stored locally for testing (again I didn't ask it to), and simply took too much time, and also needed me to approve for the session seemingly an endless number of times.

While I am not new to using tools (I've used CC and GitHub copilot previously), I recognise CC and Codex are different and will have their own strengths and weaknesses. Claude was impressive (until the recent frustrating limits) and it could tackle significant tasks on its own, and it had days when it would just forget too many things or introduce too many bugs, and other better days.

I am not trying to criticise anyone setup/anything, but I want to learn. Since, I have not yet found Codex's strengths, so I feel I am doing something wrong. Anyone has any tips for me, and maybe examples to share on how you used Codex well?

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Reddit
reddit.com › r/codex › codex app review
r/codex on Reddit: Codex App Review
February 4, 2026 -

Today, I started using the Codex app on macOS, and it looks really good. I work on multiple projects at the same time, and it helps by gathering all my projects in one place.

It also provides a feature I really needed: notifications every time Codex completes a task.

The first thing I noticed is that when I check the status in the app, it shows a 7-day limit, whereas it used to be a 5-day limit. Have you guys noticed it or am I missing something?

There are a few improvements needed. Right now, it only shows the context limit; it should also show all limits consistently in the UI.

The terminal inside the app needs significant improvement, as it is very basic. A VS Code–like terminal experience would be much better.

Lastly, there should be better project organization options. For example, instead of just listing projects, I should be able to nest multiple projects under a single folder.

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Reddit
reddit.com › r/codex › honest review gpt 5.4
r/codex on Reddit: Honest review GPT 5.4
1 month ago -

I am a software engineer and I got into using ai to identify and fix bugs and at times create ui for systems couple of months back. I started with Claude Max plan using opus 4.5/ then opus 4.6 honestly was great at imagining and making ui but still needed a lot of oversight and I read some reviews on gpt 5.3 on codex and was surprised by the analytical thinking in problem solving of gpt 5.3 it still wasn’t perfect when it had to be creative so used opus and codex back and forth but the new GPT 5.4 is just wow. I can literally trust it to handle large complex code where there is interconnected systems and it’s always perfect, if it got better in ui designing there’s nothing that can beat this

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Reddit
reddit.com › r/claudecode › new codex review: it just works
r/ClaudeCode on Reddit: New Codex review: It just works
September 16, 2025 -

I have been over 3 months user of Claude Code, and I used to love it so much, my wife was this close of kicking me out 🤏🏻 cause I was just on it 24/7.

Even when people started talking about how bad CC gotten, I was fine with it most of the time, yeah it did stupid things here and there, but with time I learnt how to avoid these mistakes and keep steering it correctly.

But since last week, there was an update to Claude Code CLI and things went down hell from that moment forward. And I was just banging my head against the wall. Even with that, I hated Codex and didn't want to try it as everybody said.

Comes yesterday, OpenAI released a new model just for codex with stupid name chatgpt 5 Codex. With update to Codex cli.

I went in, and asked it to fix something took Claude about 2 hours and still not working, it read all files and spent like 25 minutes just reading stuff, then did a very simple file name extension, and viola, it worked. But still, I said no way, this was just by chance. So I tested 5 more things, and everything just worked from my first ask, no going back and forth and trying to understand what it did and why it did it that way!! Just worked. I forgot the last time I felt this kind of relief.

Is it much slower than Claude? Yes and No Yes in reading and implementation to finish the task it is slower, but Much much MUCH faster than Claude in getting it right from the first go. So in comparison to the total time spent (reading, writing, testing, fixing the bugs, testing..... Etc) Codex is way faster.

Quick example where it amazed me: I asked it to build something, so it went and did it, but in very peculiar way, so I asked why it built it that way and not the way I was thinking of and I explained my way to it... With Claude I know you all know it will start changing what it did and make it my way instead of arguing with me, but with Codex, it explained that my way is good, but it would be better the way it did, so I don't have to manage several databases for the same purpose... Etc. I was like wosh 🤯

Give it a try you wouldn't regret it.

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Reddit
reddit.com › r/codex › those of you who switched from claude code to codex - what does codex do better? worse?
r/codex on Reddit: Those of you who switched from Claude Code to Codex - what does Codex do better? Worse?
3 weeks ago -

I love Claude Code but it's becoming unreliable with how regularly it goes down. Curious about the output from Codex, particularly with code not written by Codex.

How well does it seem to understand existing code? What about releasing code with bugs? Does it seem to interpret instructions pretty well or do long instructions throw it off?

Thanks in advance.

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Heavy CC user here, around 2 months ago, i started using codex as well. Just out of curiosity I started using gpt 5.2 xhigh to review opus 4.5/4.6 code against a small task. Almost 90 percent of the time, I found critical issues. After a month I got tired and realized that there has to be something wrong with my prompts. Visited anthropic official prompt engineering guideline for opus 4.5/4.6, improved my prompts. Now 5.2xhigh review results into 25-40 percent issues, down from 90. Then one day I tried the reverse, how about gpt 5.2xhigh codes and opus reviews but nope, opus says no critical and high issues. Extra: I have tried opus plan opus implements. 5.2xhigh plan opus implement. No, significant increase in performance. Not throwing blind prompts etc, everything is planned, problems already broken into small chunks depending upon complexity, test strategy always included, been doing ai assisted coding since December 2024 Now all of this is before when codex even had a plan mode. Fast forward most of the work is being done by codex now. With the release of gpt5.4 This is the first time in the past 8 months that I realized I wasted money this week by paying for CC sub. Maybe there are cases where opus excels compared to 5.4 but I'm not aware of any and I will be happy to find out. The only thing that I think codex needs is hooks and mcp disable and enable feature, let me check if they have been released.
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In general I think it adheres better to instructions. Though, it has regressed a bit in that area. It's not as strict in following agents.md and implementation plans anymore. Claude on the other hand has improved in those areas. So they've become more alike. There used to be a fairly large difference in tooling and speed as well, where Claude shined. Now the differences are to small for me to care. Codex writes extremely defensive code. To an extent that it often is dangerous. Also struggles immensely with cutting away code. Though, Claude has the same struggles. It's not as noticeable when you vibecode obviously. But at work, when I rather carefully look at each line of code. It takes a lot of iteration to remove junk. I often explicitly ask to avoid fallbacks, sending through empty objects and instead opting for errors. Yet, 150 lines of codes later, I have to iterate 5 times in order to get it down to 50. Because it was added regardless. My far largest annoyance right now. There's also the issue with duplicate implementations, wrapping legacy implementations instead of actually refactoring it into something new. But I'd say they are about the same there as well. Might give Claude a slight win in that area. Long instructions are not really an issue. Though, both Claude and Codex struggle with larger implementations. If you want something decent, aim for scopes that are small, and that can be manually verified (by Codex). Might sound negative to Codex here. But it's my daily driver. Though, it honestly mostly comes down to the fact that OpenAI are more generous with usage. At work I switch between them. Often I forget which one I'm using.
Find elsewhere
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Reddit
reddit.com › r/codex › codex is insane!
r/codex on Reddit: Codex is insane!
March 5, 2026 -

I was a fanboy of claude! So biased! Would do anything to code with claude code, idk why i had this opinion that gpt is so generic and its boring to code with. I had this impression since the gpt5.1 release that was the worst model imo.

So 2 days ago i noticed they are giving free month trial, and i was like "umm okay I'll give it a shot".

And rn im so amazed by gpt5.3 codex..... Bro wtf? Since 2 days working on it, very big plan in my android app! It is delivering it flawlessly. It does big phases in 1 go! The result is insanely excellent.

I've tried to do this plan with Gemini 3.1 and opus 4.6 in Antigravity (different IDE) and i reverted my files 2 or 3 times because they keep breaking my functions and files during implementation.

I just feel so happy and grateful haha, its like i found a gem. I needed this so bad! It's a time saver! And always delivering the task with 0 compilation errors or bugs. And the plan im doing is insanely complicated. Wow😲

Edit: i never let gpt do anything Ui related because i know claude is superior in this area.

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Reddit
reddit.com › r › CodexHacks
Focused group for discussing codex productivity boosts
November 3, 2025 - - When presenting feedback such as plans and code reviews: consider readability, such as larger fonts for section headings, leading emojis, bold text, using bullet points, numbered lists, code blocks, whitespace. Use the fidelity of markdown formatting. Have a sense of style and presentation ... I've always believed Claude Code's greatest strength lies in its mandatory planning mode. This gives me complete control over what it actually does. Codex still hasn't implemented this feature, which makes me worry about potential issues every time I use it.
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Reddit
reddit.com › r › codex
Codex coding tools by OpenAI - Codex CLI and IDE Extension
October 31, 2011 - Codex has 2 million weekly users, 5× growth in 3 months, 70% month‑over‑month usage growth ... LMAO reset again!!!! ... LMAO reset again!!!! ... I love opus but wtf man it’s been so lazy lately and thinks for like 2 seconds on every request. it missed so many things when I asked it to review a plan for a web app.
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Reddit
reddit.com › r/claudecode › claude code + codex is... really good
r/ClaudeCode on Reddit: Claude Code + Codex is... really good
January 18, 2026 -

I've started using Codex to review all the code Claude writes, and so far it's been working pretty well for me.

My workflow: Claude implements the feature, then I get it to submit the code to Codex (GPT 5.2 xhigh) for review. Codex flags what needs fixing, Claude addresses it, then resubmits. This loops until Codex approves. It seems to have cut down on a lot of the issues I was running into, and saves me from having to dig through my app looking for bugs.

The review quality from 5.2 xhigh seems solid, though it's quite slow. I haven't actually tested Codex for implementation yet, just review. Has anyone tried it for writing code? Curious how it compares to Claude Code.

I've got the Max plan so I still want to make use of Claude, which is why I went with this hybrid approach. But I've noticed Codex usage seems really high and it's also cheap, so I'm wondering if it's actually as capable as Claude Code or if there's a tradeoff I'm not seeing.

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Reddit
reddit.com › r/codex › i want the reasons why you use codex. currently trying it out and moving away from claude code
r/codex on Reddit: I want the reasons why you use Codex. Currently trying it out and moving away from Claude Code
February 4, 2026 -

Like the title says, I've been a Claude Code user and a fan of it, but after hearing the founder of OpenClaw say that he used Codex and he preferred it more, I decided to try it myself and I was pleasantly surprised at the experience just wondering if there are other reasons that you all like Codex over other AI coding tools since im still new to Codex. Any personal favorite features you have much appreciated <3

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Reddit
reddit.com › r/anthropic › people who switched from claude code to codex? was it worth it?
r/Anthropic on Reddit: people who switched from claude code to codex? was it worth it?
September 10, 2025 - I use models interchangeably. When one cannot sort an issue, I just check with another. Codex with GPT-5-high is very good and it takes it's time thinking and processing, and normally gives me Opus level results.
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Reddit
reddit.com › r/claudeai › is it just me, or is openai codex 5.2 better than claude code now?
r/ClaudeAI on Reddit: Is it just me, or is OpenAI Codex 5.2 better than Claude Code now?
January 14, 2026 -

Is it just me, or are you also noticing that Codex 5.2 (High Thinking) gives much better output?

I had to debug three issues. Opus 4.5 used 50% of the session usage. Nothing was fixed.

I switched to Codex 5.2 (High Thinking). It fixed all three bugs in one shot.

I also use Claude Code for my local non-code work. Codex 5.2 has been beating Claude for the last few days.

Gemini 3 Pro is giving the worst responses. The responses are not acceptable or accurate at all. I do not know what happened. It was probably at its best when it launched. Now its responses feel even worse than 2.0 Flash.

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Reddit
reddit.com › r/claudecode › as a claude code devotee i am currently using codex to do 95% of my coding
r/ClaudeCode on Reddit: As a Claude Code devotee I am currently using Codex to do 95% of my coding
February 8, 2026 -

I am/was a huge fan of Claude Code and found it the absolute best implementation of gen AI in coding until the last 1-2 weeks. I'm not sure what has happened, the quality is generally still very high but the usage limits have become absolutely beyond a joke, basically unusably restrictive.

I can code on GPT 5.3 Extra High for hours on end without a single thing getting in my way but I can give Claude one reasonably complex prompt and by the time it is done, I have used about 50-70% of my 5h limit. Two prompts and I'm done, 2 days and that's it for the week.

Am I the only one that has noticed an absolutely huge difference in what you can get done within your subscription tier lately?

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Reddit
reddit.com › r/openai › is codex enough to justify pro?
r/OpenAI on Reddit: Is Codex Enough to Justify Pro?
May 16, 2025 -

Hey folks, Codex was just announced in ChatGPT, and it seems great. I am a Software Dev and it can really accelerate my projects.

I’ve been a pro user, but switched to Plus as it didn’t feel like there was enough benefit. Now, it feels like Codex is making it worth it again.

I know it’s coming to Plus later on, but inevitably there’ll be restrictions. For one such as myself (where coding is my career), I feel very justified in $200 a month.

What do you think?

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Reddit
reddit.com › r/openai › for serious devs: can you give me insights on codex? how has it improved from 5 -> 5.1 -> max?
r/OpenAI on Reddit: For serious devs: Can you give me insights on Codex? How has it improved from 5 -> 5.1 -> Max?
November 23, 2025 -

I'm almost done with my subscriptions for Google and Cursor, and I'm looking for a new main AI code model. I was debating between Claude and Codex.

I saw that Codex has improved a lot recently, and I want to know what I should do. Specifically:

  1. Is Codex Max good enough now for creating full apps?

  2. How are the usage limits assuming I go for the most capable plan?

  3. How has it actually changed or improved over time between version 5, 5.1, and Max?

My usage: I create apps that require excellent frontend work and good connections between APIs and different pieces, especially for Salesforce.

Any advice is appreciated.