Steven Heidel, who works on APIs at OpenAI, revealed that the new drag-and-drop Agent Builder, which was recently released, was built end-to-end in just under six weeks. “Thanks to Codex writing 80% of the PRs.”

“It’s difficult to overstate how important Codex has been to our team’s ability to ship new products,” said Heidel.

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.

I’ve just tried Codex, and I’m genuinely amazed. It was able to identify poor code implementations (written by Opus 4.5) as well as a number of security vulnerabilities with impressive accuracy. For context, I only used GPT-5.2 Codex on the “extra-high” setting. OpenAI is definitely back in the game.

The competition between all these companies is great news for us as consumers.

Openai just launched Codex inside chatgpt, for pro users, and it looks wild. It can actually write, debug, test, and even understand entire codebases inside a sandbox. Openai claimed that it would take anywhere around 1 to 30 minutes to perform a task, depending on how complex it is.

Any of you tried it yet? How it compares to Cursor blackbox ai and GitHub copilot?

https://x.com/tszzl/status/1967821096545382858

Get started with Codex: OpenAl's coding agent, in this step-by-step onboarding walkthrough. You'll learn how to install Codex, set up the CLI and VS Code extension, configure your workflow, and use Agents.md and prompting patterns to write, review & reason across a real codebase.

This video covers:

Installing Codex (CLI + IDE)

Setting up a repo and getting your first runs working

Writing a great Agents.md (patterns + best practices)

Configuring Codex for your environment

Prompting patterns for more consistent results

Tips for using Codex in the CLI and IDE

Advanced workflows: headless mode + SDK

Source: OpenAi YT

Introducing the Codex app—a powerful command center for building with agents.

- Multitask effortlessly: Work with multiple agents in parallel and keep agent changes isolated with worktrees
- Create & use skills: package your tools + conventions into reusable capabilities
- Set up automations: delegate repetitive work to Codex with scheduled workflows in the background

Available starting today on macOS, with Windows coming soon.

And for a limited time, Codex is available through ChatGPT Free and Go subscriptions—and we’re doubling rate limits for Plus, Pro, Business, Enterprise, and Edu users—across the Codex app, CLI, IDE extension, and cloud.

Download the app → openai.com/codex

switched to ChatGPT Pro not too long ago and i genuinely love codex - simple tool, does what it needs to do, no fluff

but opencode is on another level as a harness. subagents, grep tools, proper file navigation - it's a much more serious setup for real engineering work

and the fact that you're letting us use it freely with the same limits as codex is huge. props for not gatekeeping it unlike, well, you know who

appreciate it OpenAI, this is how you treat your users

Hello,

Now that OpenAI is really clamping down on usage limits, I’m about to hit my cap on Codex (using the $200 ChatGPT Pro plan), and my reset is still several days away. I also have a $200 Claude setup that I’ve completely burned through, and that doesn't reset for a few days either.

What do you all do in this situation? I’ve heard that Anthropic strictly forbids having multiple Claude accounts. Is it the same for OpenAI? Can I just create a second OpenAI account with a different email for Codex to keep developing, or do I risk getting my main account banned? My biggest question right now is whether anyone here has successfully run two OpenAI accounts without getting flagged.

Also, are there any smarter alternatives out there that don't involve unpredictable pay-per-request API costs? I really don't want to go back to Cursor, though I realize it might be the last viable subscription option left. I also don't want to use Google's Antigravity IDE, i tried it and it was honestly terrible, even when using Claude or OpenAI models under the hood.

Any ideas or workarounds to keep coding without limits?

Thanks!

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?

Hello, I’ve been using OpenAI since the days of text-davinci-003 (or 002 can’t clearly remember exactly the first first model i’ve used). I’d like to share my experience and the recent issues I’ve encountered with the platform.

It all began when I stumbled upon OpenAI’s website. Back then, it wasn’t as widely known as it is today, but I decided to give it a try. After some testing, I was impressed by the project and started experimenting with it, providing feedback and suggestions.

In 2022, ChatGPT was released, and I was amazed by the rapid growth and evolution of AI. After that, I began exploring jailbreaks and experimenting with the platform further. As a result, I started spending more on OpenAI. I was constantly testing new products, watching for updates, and trying to provide as much feedback as possible. After a few years, the Pro version was released, which improved my experience even further. I continued to test Codex and explore other features.

However, I’ve encountered a problem with OpenAI recently. Last month, they introduced AI checks to conversations. Any lyrics or prompts containing swear words would trigger a warning. While I understand the intention behind this, it has been frustrating for me. For example, if I send the AI an image in another language that contains a swear word, it automatically warns me. This happened to me, and I was banned and warned. I’ve been banned for two weeks now, and I haven’t received any emails from the complains team for 2 weeks.

This issue has been quite frustrating for me, but I’m still committed to supporting OpenAI. My main review of the models is that GPT 5.3 Codex XH easily outperforms Claude 4.6 in C and Reverse Engineering (UNIX-based tools). It’s incredible how quickly OpenAI is growing, and even though I’ve been banned, I’ll continue to support the platform.

Just found this gem: Run OpenAI Codex Desktop in your browser

git clone https://github.com/friuns2/codex-unpacked-toolkit.git
cd codex-unpacked-toolkit
./launch_codex_webui_unpacked.sh --port 5999

Open http://your-mac-ip:5999

I'm surprised by the "low reasoning" guidance.

If you adopt only a few practices from this document, start with these:

- Select low reasoning level to begin with.

- Define your design system and constraints upfront (i.e., typography, color palette, layout).

- Provide visual references or a mood board (i.e., attach a screenshot) to provide visual guardrails for the model.

- Define a narrative or content strategy upfront to guide the model’s content creation.

They also provide a skill.

Ask us anything about:

• Codex

• Codex CLI

• codex-1 and codex-mini

Participating in the AMA: 

• Alexander Embiricos, Codex (u/embirico)

• Andrey Mishchenko, Research (u/andrey-openai)

• Calvin French-Owen, Codex (u/calvinfo)

• Fouad Matin, Codex CLI (u/pourlefou)

• Hanson Wang, Research (u/hansonwng)

• Jerry Tworek, VP of Research (u/jerrytworek)

• Joshua Ma, Codex (u/joshjoshma)

• Katy Shi, Research (u/katy_shi)

• Thibault Sottiaux, Research (u/tibo-openai)

• Tongzhoug Wang, Research (u/SsssnL)

We'll be online from 11:00am-12:00pm PT to answer questions. 

✅ PROOF: https://x.com/OpenAIDevs/status/1923417722496471429

Alright, that's a wrap for us now. Team's got to go back to work. Thanks everyone for participating and please keep the feedback on Codex coming! - u/embirico