How Anthropic Engineers Actually Prompt Fable 5

So we've all waited long enough. Fable 5 is finally coming back to us. And it's an incredible model. It's the strongest one that I've ever used, hands down. I've built things like my second brain, my AI operating

system. So obviously I've been playing around with this model a ton, and I've been trying to figure out the best way to use it so that you can actually use it efficiently and you're not paying for tokens for no

reason. I've looked at what people have said on X. I've listened to Anthropic engineers. And also I've read through this entire documentation right here on the best practices for prompting Claude Fable 5.

So today what I did is I distilled all of this into the six most simple and effective things that you should be doing right now when you are prompting Claude Fable 5 to get the most out of it. But it's certainly not a cheap model.

It costs double Opus at $10 per million input tokens and $50 per million output tokens. And the other thing is it won't always be on your Claude plan. And they're calling this a promotional period and you can

only use up to 50% of your weekly limits with Claude Fable 5 at no extra cost. But then after that you would have to switch to usage credits. Unfortunately, the promotional period ends July 7th.

So we only have like six days. And part of that is 4th of July weekend. Come on. Anyways, it will pretty much work anywhere though. Claude desktop app, VS Code, in Claude Code, you know,

wherever you want to use it. You can see right here, I just got this message that Claude Fable 5 is back. And if I go to /model, we can see that we do have access to Fable.

Once again, thank you so much. I'm glad that you're back. And because this certainly isn't cheap and I want to be able to test it a ton for you guys, then I hope you'll forgive me for pausing for a

quick message from today's sponsor. Real quick guys, a message from the sponsor of today's video, HyperAgent. HyperAgent has helped me fix a major problem that AI has.

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One of them will play the skeptical investor. One will dig up what competitors are already doing. One will stress test the numbers. They'll all go pull real data and come back to me with actual brutally honest feedback, not something like, "Looks

great, Nate." It'll tell me where stuff is weak and why and how to fix it. So, by the time they're done, I've got a sharper idea and the receipts to back it. And that's the part I love because it's not just

one chatbot nodding along, but it's a team that disagrees with me on purpose. And I built the whole thing myself in just an afternoon. So, if you want to build your own council, link's

in the description with free credits. So, go get roasted. Let's get back to the video. So, the first thing to understand about Claude Fable 5 is that it is obviously built a little bit different