Codex with GPT-5.4 Is Actually Good Now

GBT 5.4 extra high was able to build out functionality that I either wouldn't have gotten or I would have to pay for and I did it with 20 minutes. Let me

just show you. I talk a lot about Claude Code, but in this video we're going to talk about codecs and GBT 5.4 because we should always give credit where credit's due. And not only is GPT 5.4 a great

due. And not only is GPT 5.4 a great model with a 1 million token context window. The official Codex app is really

window. The official Codex app is really good. It's actually better than the

good. It's actually better than the Codex CLI experience and it was recently released for Windows and it now also supports GSD. So with all that being

supports GSD. So with all that being said, the Codex experience got a lot better. So, in this video, I'm going to

better. So, in this video, I'm going to go over GPT 5.4, the Codex app, how to add MCP, how to add skills, why I like the Codeex app over the Codex CLI, and we're going to build something really quickly. So, if you haven't GPT

quickly. So, if you haven't GPT subscription, or you've only used Cloud Code and haven't tried Codex yet, stick around for this video because GPD 5.4 is almost as good, if not as good, as Opus 4.6. And now, because GSD supports

4.6. And now, because GSD supports Codex, we can move between Codex and Cloud Code within the same GSD projects.

And this is a huge unlock. So, first of all, Codex has been around for a while in the CLI. They also have a VS Code extension, but a few weeks ago they released Codeex for Mac OS and they just released it as well for Windows.

Essentially, this Codex Mac app is a wrapper for the CLI, but it actually has a few more features, which makes it a better experience. In my last video, I

better experience. In my last video, I talked about how a Chad GBT subscription is a better value for money than a cloud subscription. Because with Chad GBT, you

subscription. Because with Chad GBT, you get a lot more usage even from the $20 plan. And using Codex with a $20 plan

plan. And using Codex with a $20 plan already gets you a lot of usage, but with a Codex app, they're giving two times rate limits right now. So, you can get double that. You can get so much work done. It's definitely worth it for

work done. It's definitely worth it for you to try out right now while you have two times rate limits. Before I show you the Codex app, I just want to show you the CLI. So, if I type in CEX, we can

the CLI. So, if I type in CEX, we can see on the latest version.13.0.

And one of my biggest problems with the Codex CLI is that OpenAI had to be different. Unlike other agents, they

different. Unlike other agents, they don't use slash commands. They use the dollar sign to invoke skills or commands. Everywhere else, it's a slash,

commands. Everywhere else, it's a slash, but also they had to do MCP differently.

Codex wants TOML. It's actually pretty easy, but it's just annoying to set it up because everyone else does it with JSON. On top of that, Codeex only allows

JSON. On top of that, Codeex only allows you to add global MCP servers, not project level MCP servers, and you can't even toggle them on and off. Unlike

Cloud Code, you could do SLMCP, look at all the MCP servers that are activated, either via project or via global, and you can deactivate them within a session. In Codex, you can't do that.

session. In Codex, you can't do that.

You have to go to settings and pretty much just remove it. If I did /mcp, we could look at the MCPS that are installed here. We can see I have

installed here. We can see I have Context 7 already enabled, Figma and Superbase. Some of them are enabled,

Superbase. Some of them are enabled, some of them disabled, but from here, I have no way of turning them on and off.

So now let's open up the C codeex app.

Right here on the top left you can see a bunch of new features. They have

automations which are essentially scheduled tasks and they give you a bunch of templates. They also support skills and they have a bunch of recommended skills you could download here. But to add a new skill, it uses

here. But to add a new skill, it uses its own skill creator skill. Now this is where I take a skill that I already built for Claude and just dump the whole thing in here and tell Codex to make it work for Codeex. Now if we go to Codex

settings, we now have MCP server tag.

And this is what the Codex CLI was missing because from here we could toggle them on and off at runtime. It's

also easier to add MCP servers for all of Codex here within the Codex app because instead of having to configure TOML, you can just enter it into this form. So, let's just install the Bright

form. So, let's just install the Bright Data MCP. Bright Data is the sponsor of

Data MCP. Bright Data is the sponsor of this video. I actually use Bright Data

this video. I actually use Bright Data all the time because it's able to scrape the entire internet. The MCP server has over 63 tools, has tons of data sets.

Unlike other web search tools, it is able to bypass captas and go deeper than most of these scrapers. Let's just set that up really quickly. So, we're going to bright data. We're going to create an account. Once we're logged in, we're

account. Once we're logged in, we're going to go to MCP and we're going to click configure MCP. Now, you get 5,000 calls per month on the free tier. Like I

said, they have over 63 tools. You can

choose the tools on a granular level or you can do it by category. What I'm

going to choose here is browser automation, research, app stores, but you can also add e-commerce and social media data. Not relevant for what I'm

media data. Not relevant for what I'm going to build today. So, I'm going to press continue to configure, and I'm going to switch it to streamable HTTP.

And now it gives it to me in one string.

So, first we're going to give it a name.

I'm going to call it BRD. So I'm just going to copy this whole URL and I'm going to press save. So I'm going to say something like look up the Elgato stream deck pedal with BRD. So you can see calling search engine tool from BRDMCP

and we can see that it's scraping the data here. Okay, great. Now GST is my

data here. Okay, great. Now GST is my favorite specriven development and context engineering framework. I've been

using it for months. I did a video on it a few weeks ago specifically for cloud code, but everything in that video is transferable here to codeex. Now in

short, GSD is essentially an orchestration layer. What it does is it

orchestration layer. What it does is it allows you to break down a feature or a product on a high level and then also down into very low-level planning. It

asks you a lot of questions. It does

research and then it breaks it down into very focused milestones and phases. And

essentially what they say here is it solves context rot. The whole concept here is it allows you to break everything down into small enough tasks but allows the agent to have a greater understanding of what you're trying to build and how it connects to past

phases, future phases and helps you build the whole thing out. But now

what's great is if you started a project with GSD in Cloud Code or in Gemini, you could also now continue it with Codeex.

And especially because Codex is much more generous with usage and it has double usage limits right now. It's

definitely worth it. I suggest watching that other video I did. I'll link to that above. So now let's build something

that above. So now let's build something really quickly. Here's the context. I

really quickly. Here's the context. I

have this Steam Deck pedal that I got from Elgato. Right now I use it for

from Elgato. Right now I use it for dictation and from taking screenshots.

You can assign it macros and all these different applications, but what it doesn't support is mouse gestures. And

that's really annoying because sometimes I want to slowly be able to scroll but without my hands. And they have a plug-in marketplace but they don't have mouse control. Well, there's something

mouse control. Well, there's something we could buy here, but if we search on their website on the Elgato marketplace, I see here mouse control. Click into it and there's a problem. It's Windows

only. That doesn't help me. And I think it's quite frustrating that I bought this hardware that doesn't have such basic functionality. And again, I just

basic functionality. And again, I just want to be able to scroll up and scroll down just like it does with a scroll wheel. Maybe I'll even add a click. But

wheel. Maybe I'll even add a click. But

I think this is functionality that should exist. and I don't want to pay

should exist. and I don't want to pay more for a plugin that I'm not even sure will work. So, let's just have Codex

will work. So, let's just have Codex build it. So, we already had to look up

build it. So, we already had to look up the Elgato Stream Deck pedal with BRD.

So, it has some context, but we wanted to build a plugin that will be able to emulate mouse gestures work for Mac OS and with this Stream Deck pedal. So, I'm

just going to create a new folder called pedal mouse control. I dictated this long prompt pretty much explaining to Codeex what I wanted to do. I told it could use the bright data MCP to understand the Stream Deck to understand mouse emulation. I'm changing it to GPT

mouse emulation. I'm changing it to GPT 5.4 extra high. Now, I'm going to send it off. Okay, so it took some time, but

it off. Okay, so it took some time, but it finished and it works. And I'm just going to show you what happened here.

Basically, it did research. It asked me a bunch of clarifying questions, and then it made this plan. And it doesn't say the amount of time here, but I want to say it took about 20 to 25 minutes.

And eventually, it built this plugin, and it wired it directly into my Stream Deck pedal software locally. It did

everything because YOLO mode was on. And

again, this is just a very simple use case. I didn't even use GSD here. I let

case. I didn't even use GSD here. I let

it use GPT 5.4 for extra high with bright data to go and get all the context, look at documentation, understand what needs to be done, understand Mac OS. And let me just show you. It added this new thing called

you. It added this new thing called pedal mouse. And it added three

pedal mouse. And it added three functions. Scroll, click, and hold drag.

functions. Scroll, click, and hold drag.

So, let's just go to like context slop.

And hands are up here. I'm going to do the scroll down gesture. I think it's the right pedal. Yeah, I could go back up. I stop. Very easy. Just scroll up

up. I stop. Very easy. Just scroll up and down. Now, if I want to click, I'm

and down. Now, if I want to click, I'm just going to click the left pedal.

Boom. And that's the functionality that I expected this pedal to have. Now, this

is just a really easy example, but I guess my greater point is with a powerful model that has the ability to use tools and MCPs to get more context on the web, and in this case in YOLO mode, was able to build out functionality that I either wouldn't

have gotten or would have to pay for.

And I did it with 20 minutes by giving it proper context, telling it to ask me questions, making sure it invoked plan mode, and let it just run. And this is the second time Codeex oneshot something that used external libraries that

interfaced directly with Mac OS. And I

think that's pretty cool. And I hope that this video will help you understand that you are able to build things.

Sometimes they're really small, very personal things like I built right here.

And other times they're big features or even bigger projects. And while Codeex used to be very far behind cla code, this new Codeex app with skills, with automations, with an easier way to add MCPS and toggle them on and off makes it

so much more powerful. And I highly suggest checking it out. So I hope you found this video helpful or insightful.

If you have any questions, drop them in the comments below. I'll drop a link to Bright Data in the pinned comment. If

you haven't done so already, subscribe to the channel. It really helps me grow.

Thank you guys for watching and have a great night or day.