Transcription
Ladies and gentlemen, Fable 5 is back online, and in this video, we are going to be building an application using Fable 5 and comparing it to Anthropic's other models. We're going to be using the same prompts up against each other, comparing the results, and by the end of this video, you'll have a good idea of the capabilities of Fable 5 across all the Claude products.
I'm not just going to be doing a little demo where I build something small like Snake. What I'm going to be doing is actually building an application that connects to real data. And I'm going to be showing you how this compares and how it contrasts to other models like Opus. And for those of you who are living under a rock and you don't know what Claude Fable 5 is, it's Claude's new model. It's the best model that Claude has, the best model on the internet right now. And it claims that the longer and more complex the task, the larger Fable 5 has a lead over other models. And so with that in mind, we want to really put it to the test today. And we want to see how it can do oneshotting an application, meaning building an application with all of my data in one shot.
I'm kind of going to build this health dashboard that tracks my habits and tracks my sleep data. I've got this ring that connects to the internet and has an API. So, I'm going to be connecting all of my sleep data. Like I said, I'm going to take this video and I'm going to be using a lot of Claude features. I'm going to be building a Claude design system with Fable 5 so that my app that I build later has a nice user interface. This is what I recommend for whether you're creating an automation, whether you're creating a website, SAS company, it doesn't really matter. I would start with a Claude design system. Fable 5 is accessible via Claude design. And so first, we're going to do that. Then I'm going to move over to Claude code and I'm going to try to oneshot this application. I'm going to try to be efficient. I'm going to compare it up against Opus 4.8, maybe even Sonnet 5 now since that model is out, and we're just going to check the results and give an honest overview without any prior thoughts because this is my first time trying to build an app with this thing.
So here we are in Claude design, and in Claude design, we can see here Fable 5 is available in Claude design. What this does is it gives you a branding system that is the look, the feel, and the user experience of your application. So, what you do at the end of the day is just describe the vibe that you want. You can upload images for inspiration. You can just describe what you want. It doesn't really matter.
"Hey there, Claude. I want to build a personal dashboard that tracks my health and my habits and kind of just my life in general. I want this to be called the Drake OS, the Drake operating system. And I really want to build out a good user interface that I can eventually turn into an iOS app that I can kind of run my life from. I want to pull in things like my Aura Ring stats. I want nice stat cards. I want my goals being tracked. I think I'm going to have a Google Docs like system in there because I use Google Docs a lot and I want to replace all my tools. But right now, I'm really just needing some inspiration for design. So, I'm thinking I really like a liquid glass type style. I want a unique font. I don't want the typical serif fonts that you always provide. I want something like chakra patch. I think that might be a cool font pairing. But first, I kind of just want to go through an ideation process with you. So, give me a bunch of ideas. Walk me through something that's going to design the perfect styling guide for me and my app. Something like that."
Usually, when I'm talking to these models, I am just going crazy. A model like Fable 5 will be able to dissect exactly what I mean with this little liquid glass-like style. And notice I said Google Docs like system in there. I want to be able to use like a dark mode Google Docs in my own app because I'm on Google Docs all of the time. And so now it's going to walk me through. Fable 5 is already going to work. I'm just going to answer these questions here. This is basically just like helping me find my style. Asking me for a color here. I really don't know what color I want. I'm thinking warm and ember just for the Claude memes. I'm going to hit continue. And now it's going to give me some examples I can use. Now it's just like designing this dashboard for me and just giving me some inspiration that I can draw from, and I can change the UI and the styling here, and then it gives me a file that I can give later to Claude code, and the styling will be handled ahead of time. This is why I like doing the design system first. You focus on the front end here, and then you focus on the back end and the wiring and the API layer later.
I don't know. Right now, I'm really liking this bottom one. This bottom one is looking sweet already, especially with think about when you get the animations in here with your actual stats. Come on.
Okay, so Fable 5 created me three different styles: we have Mission Control, Molten, and Signal. Signal is, I mean, it looks nice, just looks a little too boring for me. I want something a little bit more fun. Mission Control, it does look cool. I like the blockiness of it, very tactical, but I do like this Molten look the best. Probably a little typical, little too a little SAS dashboard for me. Now I can just let it know that direction that I want to go. I want to go all in on Molten. Just like that. And then I can send it off. And now it's going to create me individual assets and then turn that into the entire branding system.
Okay, so it went all in and created me this entire branding guide. Now, I paid like 4K for my branding guide, and this just did it in a matter of minutes. It breaks it down by like color, typography, the glass look since I said I wanted liquid glass, shaping and spacing, components here. So, status pills, ring in progress for my Aura Ring stats. If you know the right language to say in your domain, then Fable 5 is going to be better. If a designer uses Fable 5 and Claude design, it's game over. And so, this looks great. I really like this. But now I want it to actually create the designs for the other pages like my docs page, my calendar. So I'm going to say that now.
"Okay, now create the UI elements in the pages and the design style and layout to give me an idea for all of the other pages that I mentioned earlier that we're going to have like my documents page, my calendar, and everything else."
All right, it created me all of my pages, and I could edit this thing all day, but I'm liking this. This is like my docs page. This is my inline docs page where I can edit text. This is going to be my calendar view. Like I said, there are things we could edit about this, but not too bad for three prompts with Fable 5. Here's my goals page where it's tracking progress on my goals, a consistency bar. Very cool.
And so now what I'm going to do is I'm actually going to build this thing so I can use it as a Swift application on my Mac. So, I want to be able to actually come in here, click buttons, and use this with an actual database and start tracking my habits, throwing in my sleep score, doing all of that stuff. So, what I'm going to do is hit share. And this is just some preliminary stuff to the actual Fable 5 magic. I'm going to hit export and then export it as a project archive. And I'll hit download. And what that's going to do is download that entire design system with all of the colors, images, inspiration, animations. It's going to download that to my computer, and I can hand that off to Claude now.
And I want you to remember it says the longer and more complex the task, the larger Fable 5's lead is over other models. And so that means I want to give this thing a very large task if I want it to come out on the other end rock solid. And for that reason, I'm going to be using my SPAR framework and slashgoal and Claude. And so what this does is it basically creates you a PRD, which has Claude interview you to create a project requirements document for Claude to use. And this becomes your slashgoal prompt. And the loop looks like this: When you type in /goal to Claude, it runs through this loop until it completes a job for you. You set the goal. Fable 5 will attempt to accomplish the goal. It will give you an output per usual, but there's a secondary agent checking: does the output match goal success? And so you define success criteria in your goal. And if the output does not equal that success criteria, Claude will give feedback and reason for that task not being complete and then restart the loop. And so this will loop until it finishes and accomplishes the goal. And I imagine with Fable 5, if they claim it to be better at longer running tasks, then slashgoal is going to come in clutch here. And that's why I want to use that during this example.
So, a lot of things going on here, but first, I need to kind of build out my PRD based on my goal and based on my app idea. So, I'm going to copy this prompt. And you know what? Might as well use Fable 5 for this as well, even though I don't need to. And I'm just going to send off that template prompt because this is just a prompt telling Claude basically to interview me. And then I'm going to answer all of the questions it gives me. That's why I love this prompt. It asks me questions, I answer, then it says, "No, you're wrong. Give me this instead." And so I give it what it actually wants. That way it can actually put together a good document for Claude to actually code around. I'm continuing to answer the questions and I'm going super in-depth. It's asking me like, "What are the concrete things that will exist when this is done?" And then I'm just telling it everything I want on there.
Okay, so I just finished up, and now we have this huge prompt that we can give to Claude Fable 5, and we can watch it work, and we have success criteria here. So Claude is going to keep on building until it completes this entire success criteria. And so all of these things have to work before it stops. I'm going to be putting this to the test on both Opus and Fable 5 at the same time. I'm very interested to see how this works. I can just tell this to I'll make this effort medium and I'll say create me the copy and paste slashgoal prompt now with everything needed. This is part of the SPAR framework, the AIM step. So right now I'm kind of aiming this, and so slashgoal is going to make Claude do that agentic loop. And again, said Fable 5 is really good at these longer running tasks. But right now, I'm going to copy this prompt, and now we're going to go actually build the app with Fable.
So here I am in Claude Code. As you can see, we have Fable 5 active and ready to go. But what I want to do is create two different directories and test this prompt in both Opus 4.8 and Fable 5 at the same time. So this first folder that I'm going to create is Drake OS-OPUS48. And then I'll hit create, open trust workspace. And then I'm going to change this to Opus 4.8. And for this, we're just going to be using effort on high. We don't want to use ultra code. We will burn through all of our tokens in a matter of like five minutes. We could even go extra, but I think high will be enough with this /go prompt. And then I just want to type hello. And I will turn this on auto mode. And after I type hello, this is going to set Claude code in this directory on Opus 4.8.
And now what I can do is I can start a new session. I can create a new folder. And I'm just going to call this Drake OS- Fable 5. Then I'll hit create there and open trust workspace auto mode. Enable auto mode and then change the model to Fable 5. And I will type hello in this chat because what you can do is you can do split panels in Claude code. So, I'll go to recents and then I will open this in a split view. And now we have Opus 4.8 over here on the right, and Fable 5 over here on the left. Fable 5 is a little bit more straight up into the point. I like that. Opus 4.8 is showing off and burning through our tokens already. Nice.
So, we are on Fable 5 high, as you can see. And we are on Opus 4.8 high. I'm going to paste in that prompt on both of these, and I'm going to add that design system to both of these prompts as well. So, I'm going to select this button, add folder, and then I'm going to add this ideation design system that we created in the beginning of this video. And I'm going to do that to both of them. And now I'm going to make sure /goal registers. Type in slashgoal and then actually click it until it turns blue. As you can see right there. I'm going to do the same over here. Slashgo. And then I'm going to add a line. I'm going to say, "Use the design system attached for UI." And then I'm going to add that to both prompts.
And now the moment of truth. We are going to send this off and see how these models work through. How long is it going to take? How many tokens is this going to use? I'm very interested to see how this works out. So let's test it off. Fable 5 versus Opus 4.8. Sending off Fable 5. Sending off Opus 48. And now these two models are going to get to work and burn through every token on my account.
So, some different strategies. First, Fable 5 is just reading through the design guide. And Opus 4.8 over here. It checked its tools first. And now it's reading through the design guide. It looks like Opus 4.8 is kind of running pretty quick compared to Fable 5 right now. Okay. Opus 48 says it has a thorough grasp of the molten design language and all five page layouts. It says, "Before writing thousands of lines, I'll verify the critical assumption." So, it's going through its verifications first before it gets building. It says it's going to stand up a minimal skeleton and prove the tool chain first. So, Fable 5 is taking its sweet time. It is still over here reading my HTML, my design guide. Opus is spinning up test servers and testing the tool chain and doing a lot of things in parallel over here. Fable 5 is taking its time on the brand guide here. I'm just going to periodically check this. My 5-hour limit is currently at 11%, and my weekly all models limit is at 2%. I'm wondering if Fable 5 is having like a status issue or something, 'cause it doesn't look like it's moving. It looks like all systems are operational. It must just be thinking more than Opus.
Okay, it looks like Fable 5 is back online after 8 minutes of inactivity. Uh, now it's starting to burn through tokens. It took a long time reading through that, and it looks like it's even messing up some characters. Very interesting. So, even though it started off a little bit behind, it looks like it's catching up in token usage. Uh, this is the exact same time, by the way, both at around 10 minutes and 15 seconds. It handled the Aura ring layer first, which the Aura ring, by the way, if you guys don't know like what the Aura Sync is. Some of you have probably heard of this, others maybe not, but I've got this little ring here that tracks my sleep. Very cool. And it has an API, which is perfect for me since I'm in Claude Code 24/7.
So, we're about 16 and a half minutes in. And as you can see, Fable 5 is pulling way ahead in tokens, although it started way behind in the first 8 minutes. And one thing that I think is hilarious is the way these models are working. Opus 4.8 truly feels like it's like a new happy excited junior developer. While Fable 5, it doesn't talk to you, but it just gets work done. It just creates files and says these like little one-sentence things. It literally just gets work done. Meanwhile, Opus 4.8 over here is sending me a paragraph after it creates a 100 lines of code. Then Fable 5 is over here just like creating the entire app in silence, which I think is just hilarious. I don't know what kind of style you like better, but I think it's funny that even up here, Fable 5, "Hey Drake, what can I help you with today?" Opus, "Hello, I'm Claude Code" with like emojis letting me know that it's good for software engineering. Meanwhile, Fable 5 is just in the background. "Core logic is done." You know, it's just hilarious to me. I don't know why. The things you start finding funny when you use Claude code all day. It it's quite sad, actually.
Usage limit check. So, my 5-hour limit's at 17% now. Weekly's at 3%. Really not that much of a difference, honestly. I'm actually quite happy about that. Babel is now running the LifeOS for me. Looks like it is testing it out a little bit to see. Looks like Opus over here is still creating the docs library. So, I think Opus got going a little too fast. Meanwhile, Fable had like this slingshot effect where it didn't do anything for 10 minutes and then it just did everything really fast and didn't really talk to me. I think Opus actually loses time when it starts writing all of these paragraphs and describing what it does every single line, which could be good for like a learning process, but not really a speed and efficiency thing. It looks like they're doing the exact same thing right now. It's doing a seed complete print on both sides. So, it's pulling up some things it would like me to allow. I will allow that.
Okay, it looks like one of them finished. We have our entire dashboard built. And this is in a Mac OS app. Like I can minimize this. I can open it up. Fable 5 is over here requesting computer use access. I'll enable that. It asked me to restart my Claude for this one, but I kind of want to keep everything going because we have tasks in progress. I'm just going to try to hit continue and see what it does. All right. Look at this Fable 5. Everything is green in final form. Saving a short project memory than the full report. So, it's creating memory right now. It looks like it's going to get done around the 30-minute mark. 55,000 tokens used. Uh, that would be awesome if it ended right at 30 minutes and almost done thinking. Okay, 55,000 tokens. It says that this quit life quit unexpectedly. A lot going on here. Okay, so it just finished up. I keep getting this error. I'm not sure who this is from. I'll just click reopen. And Fable 5 finished in 30 minutes and 30 seconds with 55,500 tokens. Opus 4.8 is at 30 minutes, almost 31 minutes, and 56,000 tokens. So, more tokens on 48 right now. Look at everything it said it created. This keeps happening, and I'm not sure if that's from the Opus build or from the Fable build. I'm just going to hit okay. But Fable comes back with its longest message yet. It says, "What was built? A native Mac OS 14+ Swift app in this folder. Hand-rolled Swift data persistence with iOS portable models." So that means I can actually make an iOS app from this. Very cool. And then it gives me some of the rundown on the styling. Um, I hope this isn't from Fable. I hope this is from the Opus 4.8 so I feel better about using Fable. So, for the success criteria, prove every one of these. It said all of these tests passed, and it did it under 30 minutes. So, let me go actually open this app to check it out, and we can let Opus 4.8 keep running over here.
All right, so we are within the app that Fable 5 created. And so it looks identical to my design system. And that's why I like doing the design system first because you can pretty much get the UI handled with Claude design, but I'm interested in the functionality. Like now I'm clicking through here. I've got my documents here. I can select new doc, and it looks like I can start typing. So, this is pretty sweet. And this keeps popping up. I think Opus 4.8 is tweaking out, but the Fable 5 version is looking very nice right now. Um, we have my calendar view. I can edit a block. And this is on my Mac. This is a Mac app that I've just created, which is pretty insane. So, I can maybe put in an event. It's going to kind of test out all the functionalities here. Uh, maybe I am going to hit a workout. That'll be a ask for. So, the date picker isn't that great. I didn't really provide any um styling elements for a date picker, though. Maybe I'll do that today, and I'll start that. Well, it's already 6:30, so maybe I'll start that at 8. I can hit save and it adds it to my list of things to do. I can hit completed save and then it checks it off just like that. So, that's very neat. And I can even hit that little check. Okay, this is getting annoying. Opus 4.8 needs to figure that out. But I can hit that little checkbox right there to check off tasks on my list, too. So, here's my health UI. And then here is my goals UI. So, pretty cool for one prompt with Fable 5 and a little bit of planning beforehand. This isn't too bad. Now Opus is tweaking, I think. I don't know. Yeah.
So, Opus, a fatal error in the restart test crashed the whole test process. It carried a persistent identifier across two containers, which is invalid. Let me check what passed before the crash. Remember, we typed in the exact same prompt, put on the exact same thinking effort, and it wrote us a book. Opus 4.8 has written us a book here, but it keeps on going in these fatal errors. Meanwhile, Fable 5 said, "I'm not going to talk to you, but I'm going to come over here and I'm just going to build and I'm just going to do it right and I'm just going to get it working and I'm just going to make sure all the tests pass without any questions asked and I'm going to follow your goal prompt to a T." So, this is still running, still crashing. It doesn't really know what it's doing. So, I'm going to keep letting this guy run over here, but I kind of want to get editing a little bit with Fable 5.
So, let me just do like a little bit of iteration. "All right, good work. This looks beautiful. What I want to do now is I want to add that motion upon my cards flipping. And I also want to sync up my real Aura Ring stats. I also want to be able to zoom in on the page if I hit command and then the plus button so I can zoom in a little bit. Uh, or just make everything a little bit bigger because right now everything's a little small. But other than that, it looks great. Here's my Aura client secret and my Aura ID. I actually put those in my local environment. So, make sure you check there. And I'll also say, tell me which redirect URIs I need to add to my developer portal in Aura Ring."
Beautiful. Now, I'll send that off. I'm actually really impressed with this document editor that it created, though. Maybe I'm scripting a video like Claude Fable 5 new model. And now this is on my computer. I don't have to go online to use this. And I can I can just start typing in. I can say Claude Fable 5. Maybe give this a heading one. Pretty cool. I mean, there's some like little UI things like those bullet lists are black dots and they should be white. But I love this.
Opus 4.8 has moved to seven tasks running now. Some of them are waiting for completion, and it's still reading crash reports. Meanwhile, Fable over here says that it loves my recommendations. I have used now 23% of my 5-hour limit, but only 4% of my weekly limit. So, that's not too bad. I think we get up to 50% of our weekly limit with Fable 5 right now, which is nice. But the numbers are climbing for one session quite rapidly. I'm not giving up on Opus. I'm still interested to see the final result and comparing it to the Fable 5 result. It looks like it just passed all 16 tests. So, let's see what it does.
All right, we're almost an hour in, and Opus is still running through this process. It's even running more tasks now. So, it's going crazy over here just to try to run this app. Opus says massive progress. 93 tests passed, zero failed, only two crashes remaining at a different address. Let me find which test. And so, it's still looking at crash reports. I'm starting to think people's usage on Opus might be going up a lot with these little messages. I imagine all of these little messages begin to add up, right? I mean, I imagine this could be the moment of truth, though, for Opus. Let's see if it can build this thing in under an hour. I I was getting excited. I'm like, "Okay, Opus just built something." And no, it's just it's Fable finishing its 15th round of iterations.
All right, so let me see if the zoom works. I told I want to be able to hit command and plus to zoom in. Okay, that works, which I really like. I kind of like when it's zoomed in a little bit more. I don't know. I feel like my my grandfather when he's on his iPhone. I mean, this just looks sweet, and it did such a good job. I'm interested to see where are my Aura Ring inputs. I'm going to paste that secret in there. And then I'm going to hit connect with Aura. Waiting for browser. And so now it brings me to this consent browser. Then it says LifeOS is connected. Aura is linked. You can close this tab and head back to the app. So, it created a custom success page for me on the authentication. That's insane. I'm going to go back here. Connected. Pulling in your last 90 days from Aura. This is wild. This is insane. Yeah, these are my actual stats, too. I think it pulled in today's stuff, okay? But I don't think it pulled in uh this trend, okay? So, I mean, there's things I could change. Like, you get that. But for like two prompts in a design system, I've got a Mac OS app that I could just work out of now with my own document editor. I've got a calendar in here that I can add my events to. I could add notifications. Like this is insane.
Let's see if Opus is done working. No, but this is sad at this point. Oh, it says it's built. It says everything's built. So, we can test this out, and then the video can just be done. I felt bad for Opus. About 79,000 tokens took more than double what Fable took. I even got some changes implemented with Fable. Let's actually open up the other one and see. Oh gosh, I I don't even know if this is going to open. Let's check it out.
All right. So, here here's the one that Opus built. Now, it's not bad. I'm not trying to glaze Fable 5 in any by any means, but I don't know. I mean, it keeps closing on me, and I've been trying to tell Claude to keep opening it, and it says it's it's crash looping at runtime. All right, so Opus, it just keeps closing. If I try to click a button, it closes. Okay, it looks like Opus doesn't look too bad, actually. I like the consistency graph. It's not too bad. It looks nice. I mean, it's really not bad. This is something you could work with and then iterate over a little bit, and you could work with the UI a little bit more, and then you could get it looking really nice. It didn't do too bad of a job. It did take 30 minutes longer and it used double the tokens nearly, and it keeps crashing, and whenever I hit the doc editor, it doesn't work. The doc editor doesn't work. Um, so that's an issue. It's workable. What is what I'm trying to say.
So, this has been the full Fable 5 review and test and comparison. I hope that you enjoyed. If you did enjoy, please drop a like and subscribe. I would highly appreciate it. If you want to join a group of builders and you want to learn how to vibe code, you want to learn how to publish apps, you want to learn how to build Claude automations that run your business for you, then check out our community that we have in the description. It's full of people who like AI a little too much. We're all fanatics in there, and we get on calls. We have a bunch of course content that you can learn through. And if you truly want to automate yourself out of a job so you can sit around and vibe code all day, that's the place to do it. We've got a lot of members in there that are bored now because they've automated everything. So anyway, hope you enjoyed, and I'll see you in the next.