GPT 5 6 + Claude Code is INSANE!

**Julian Goldie** (0:00)
Today, I'm going to show you a powerful system where you can plug in GPT 5.6 into Claude Code to get the best agent harness, which is Claude Code. And then you can plug in the brain, which is GPT 5.6. And the beautiful thing about that as well is that you don't have to worry about Fable 5 going away or any frontier models going away, because you can just plug in your existing setup with ChatGPT in your subscription to build and automate whatever you want. Also, the great thing about this as well is that you can actually switch between, for example, like GLM 5.2, and you can toggle any sort of model inside here. So you could even plug in free APIs into Claude Code using this. Now GPT 5.6 is a really powerful model.
It's also a lot more generous on the API tokens you get with this, whereas, for example, Fable runs out and we don't know how long Fable 5 is going to be available on the subscription. At some point, they've just extended it today, but at some point, they are going to remove the option to have Fable 5 on the subscription, which means you have to pay extra for it. So with this system, I call it the dual engine coder. You have one coding tab, two frontier engines and GPT 5.6 with your O-off login, which also means you can create images and get the full power of GPT 5.6 inside Claude. And you can flip between them mid build. You can have them building into your workspace and you can see an example of it working right here.
So we said build out a beautiful SEO website and it's like, yeah, I'll set the direction. Here's what we're going to do. I'm going to use 5.6 to build that out. Also, you can use this for generating images because GPT 5.6 can generate images for you. Now, you might say, okay, why would you do this? Well, I call this the tool juggling problem. You want to build with AI so you open a tab, then another for the cheaper model and then another for whatever drop this week. And each one has its own login, its own window, its own build. And to use GPT for real building, they tell you to get an API key in the start, second subscription. So now you're using the model in two different places, it gets messy and also you're worried about Fable 5 and the token limits. With this system, that breaks up because you have GLM 5.2, you have GPT 5.6 plugged in to Claude Code as well, or whatever you want. And also you can switch to the Claude tab over here. And so you have everything inside one system and you can switch between all your favorite frontier models and get the most out of each one.
And you might say, well, I'll just pick Fable 5 and live with that. But the thing is that at some point you're going to run out of tokens on Fable 5 or Fable 5 won't be included in the subscription. And this is an easy way to get around it. So you can see now that the page is created and we've just built out with Claude Code using GPT 5.6 inside the system. The other thing that I like about this is you get a UI you're familiar with. And also everything that you're doing right here is saved into the workspace. You don't miss out on anything. You got previews of everything you've built. I mean, you can see all the amazing stuff that we've built with this system. And it's pretty easy and simple to do. We've even, for example, like created this amazing game as you can see, and you can look around and you can preview everything you've built inside one place. Beautiful. And if you build anything new, it goes into the workspace so you can save it for later. You can also switch between GLM 5.2 and GPT 5.6 sole over here and then go back to the terminal and start coding again. Pretty amazing stuff. And it doesn't cost you anything extra because you're using your ORF login with ChatGPT, which is unbelievable.
So what this actually is, this is an AI coder that writes files for you. Writes you ask, you flip the switch, and it starts building out for you.
And you can switch between builders. You don't have to worry about tokens. Everything is saved in one side, one place. And also the other thing I would say is like before, I had a different tab for every AI that could code, one for GPT, one for a cheaper model, one for whatever was new that week. And I'd build something great, switch tools and then find it again. And to use GPT for real building, I was taught, you know, quite often people need like an API key and that sort of thing.