Fable 5 Dies in 4 Days... Do these 5 Things RIGHT NOW

summarized

TLDR

Fable 5 is the most powerful AI model available, but it will be removed from the Cloud app in 3 days and only accessible via API. To maximize its value, users should immediately apply five use cases: a wheel-of-life life review, premium website design, building an agentic operating system, security vulnerability analysis, and theory-of-constraints business bottleneck analysis. The model is best used on low mode for most tasks, with high/max reserved for strategic planning, and users should compact conversations and tag rival models for reviews.

Key points

  • Fable 5 is the best model on the planet, outperforming Opus 4.8, GPT 5.5, and Gemini, and costs 50-60% less on low mode than Opus on high.
  • The model will be removed from the Cloud app in 3 days and only accessible via API, so users must act now.
  • Level 1: Use the wheel-of-life prompt to get a comprehensive life review covering health, work, and relationships.
  • Level 2: Fable 5 is the best design agent; it can one-shot premium websites with interactive elements and better aesthetics than Opus 4.8.
  • Level 3: Build an agentic operating system that centralizes all AI usage, skills, memory, and spending into one dashboard.
  • Level 4: Use Fable 5 for security threat analysis and code review; it scored 90% vs Opus 4.8's 80% in a blind test.
  • Level 5: Apply the theory of constraints to identify and fix the biggest bottleneck in your business or work.
  • Practical tips: run everything on low mode, tag rival models for big reviews, start with high/max for strategy, compact conversations to save tokens, and set sub-agent effort before spawning.

Tools mentioned

  • Fable 5
  • Opus 4.8
  • GPT 5.5
  • Gemini
  • Fable Fighter
  • Claude Code Masterclass
  • Hermes agent
  • Obsidian
  • Codex
  • Anti-gravity
  • Claude Kern
  • Open Core

Techniques

  • Wheel of life review
  • Agentic operating system
  • Theory of constraints
  • Security threat analysis
  • Adversarial verification with rival models
  • Compacting conversations
  • Using low mode as default
  • Tagging rival models for reviews

Takeaways

  • Use Fable 5 on low mode for most tasks; it beats Opus 4.8 on high and costs less.
  • Start with high/max mode for strategic planning, then switch to lower models for execution.
  • Build an agentic operating system to centralize all AI tools, skills, and memory.
  • Apply the theory of constraints to identify and fix the single biggest bottleneck in your business.
Transcript (captions)
Fable 5 is so powerful, the only thing that can stop it is the US government. And in 3 days time, it will be completely removed from the Cloud app and only accessible via an API. And so, in this video, we're going to go through the five use cases that you need to do right now. So, you can become insanely productive, make more money, and get light-years ahead of everybody else. And if you're new, I'm Jack Roberts. I built and sold my last tech startup with like a gazillion customers. Now, I'm building my own AI startups, and I share you the stuff >> [music] >> that actually works. So, if you haven't already, grab that beautiful coffee and let's have straight up. Now, before we ask Fable to build an even better Fable, there's something that you have to understand before any of this is going to make sense to you, and you're going to want to make sure you follow all these five levels in the video. So, people will get like They're going to say, "Hey, why is this person so freaking productive?" Here's the thing about Fable 5 again, is it every dollar you spend or every token that you use gets you more compared to Opus 4.8, GPT 5.5, and Gemini, all the models in fact, it is the world's best model on the planet available right now, subject only to models that have not been released. And if I can prove that, here's a graph that shows you. Crucially, you can You can get more per task. This green right here is Opus 4.8. In other words, the low mode on Fable 5 is as good as extra high is extra high on Opus, and it costs way less. Almost I'd say about 50-60% less. That's how good this is. But then, this brings us on to a very important point that if you don't understand, no Fable 5 video is going to make any difference for you. And this is the idea of a car and a driver. Now, if you think of the engine as the model, right? Fable 5 is the best engine we can possibly get our hands on right now. A bad driver, okay, with an amazing engine will be worse than a great driver and an okay engine. What do I mean by that? I mean, you can have like the best Think of like a level 99 character in a video game with the worst possible player that doesn't understand the controls. The point here is that you also need to know how to use Fable 5 to get the most out of it. And I'm also going to show you how you do that in this video as we go through. It's an incredibly powerful model, but we have to use it correctly to reach those maximum levels of performance, which we'll cover. And we're going to do that by starting with level one. Now, level one is going to be your life, essentially. Now, if you want to just go straight to the business and the core things we can build, I'll time stamp it below. But life is the foundation, right? We're not just robots that build things in business. This is something that can genuinely improve every area of your life. And in fact, the stuff that I've used most has basically been life-related stuff with Fable 5. And this is called the wheel of life. It's broken down into three areas. It's health, which comprises of body, mind, and soul. It is your work, which is growth, money, and your mission. And then it's relationships, which is family, romance, and friends. And the idea of this is that you fill this out from a score of level one to level 10 about how happy are you with the amount of effort and energy that you're putting into it. In other words, like, how satisfied are you with that? Do Are you saving loads of money? That would be a 10. If you're not, that would be something slightly lower. Now, the first thing I want you to do is go ahead and grab this prompt here, which is a wheel of life full life prompt review. And literally, what you're going to do is copy this prompt, and I want you to throw this directly into Fable 5. And the best way to think about this is spokes on a wheel. You could be firing on all cylinders in work and relationships, but if your physical health and just your health in general isn't great, it's going to collapse. And then all you're going to do is literally come down here, grab this prompt like so, I'm going to straight over to Fable 5, and Fable 5 will interview you and give you the most comprehensive breakdown that you've seen about your life. And if I come over to the Fable 5 usage guide, and I There's just something I built together for my group just to help them understand how to use Fable 5. We can actually see down here, if we go to something like research, we want to be using Fable 5 high. So, I'm going to come straight back over here. I'm going to make sure I've got Fable 5 set to the high setting cuz I do want it to do some research and be very intelligent with this sort of stuff. And then I'm going to come down, paste in a prompt, and then actually chat with Fable 5. And Fable 5 came straight off with a question, which is body question one, walk me through yesterday physically, what time you woke up, how you felt like waking, what you ate, what you drank, and when you actually fell asleep. Goes for all the questions, and then you're going to have a comprehensive overview. I highly, highly recommend that you start with this one. And this takes us very importantly onto level two, where we really start taking things up a notch. Now, here's the thing, is that Claude is the best design agent on the planet. And the best model of Claude is, of course, Fable 5. And you may be saying, Jack, is that the Fibonacci sequence I see on this patch of paper? And you'd be 100% correct. Yesterday I did a full video on the seven levels of websites, and I'll put a link on screen if you want to go deep into this, but I have to show you this, cuz this is really, really important. Now, look, this website here, for example, was built by Opus 4.8. Very cool, very decent, you know, it's a it's a great website. But when I built this with Fable 5, and I actually took it to a completely new level. You can see, and by the way, the animation was just something that I made. You can use any animation you want to, but I want you to really pay close attention to it are the small details that Fable 5 actually brings to the table. It added in this full interactive brief coming in, and it basically understood the purpose of what I wanted to do. It kind of articulated that. It built all these dynamics itself. And with design, a lot of it is less is more, and it understands that. I mean, just look how beautiful and easy this is. It picked up the detail in terms of the lines. I pretty much one-shot this. So, not only was it better quality, it did it in one thing. So, what we need to do here, and just look at this scrolling thing, it's actually crazy. Again, come down here, we've got the brief for design. This is the kind of stuff you see on premium websites, and there are full strategies on exactly how to do this. And Fable 5 crushed it with this. Another example of what it did is it built this website in one shot. Let me show you exactly what this looks like. I come in, I descend. I have this thing. I even have music. I'm just going to mute this. As you can see, I can scroll and as I scroll in, I get new things. I'm in this section here. I can scroll in further and look at this. I go in and now I've got this ice cube. I can come back out. I can look at it. It is insane. It did this in one freaking prompt. Then I had this comparison here. This is 4.8, okay? I scroll down. It's not a bad website. 4.8 it's not like, hey 4.8 we don't care about you. 4.8 is great, but it's not on the level of Fable 5. Okay? It's not a bad website. This is a good website. Let me show you what Fable 5 did. I'm going to refresh this as well so you can see. First of all, this image is a category above this one. It's crazy. I'm going to come down. I had interactivity on that which is fantastic. It understood what was going to sell it. This is a lot fresher and gorgeous. It's got better transitions. And look at this, guys. Look how naturally it bundled together the core of this website. The eight cans, 12 cans, 24 cans. It is a premium design that absolutely crushed. And if you're hearing this and thinking, Jack this sounds great, but it sounds a lot like Vietnamese. I'm going to put down below a link for this full Claude Code Masterclass that will take you from a complete beginner to learning everything from building websites, all of my best systems, and the power features, the memory system, Hermes agent apps, building anything, even monetization. Everything you need to know. It is the most comprehensive thing that I built so far. And that includes the full Claude Code operating system. I'll put a link for you down below. Now, if you want to actually build some websites, I'll put a link here that shows you the full breakdown of how you use Fable 5 to do that so you can get flying. But whether you have an existing website or you don't have one at all, now is the perfect time to go ahead, get Fable 5 to criticize it. Find out what's actually working in your niche and really level up the design. Fable 5 just has a beautiful eye for design and it is unstoppable when it comes to website design. It's the best one that I've ever used. I am so impressed with this model. But it does fit nicely lead us on to the third level out of five with Fable 5 that we need to be doing right now. And that is the agentic operating system. What do I mean when I say agentic operating system? Effectively, it is the everything of AI. It brings your entire world into one location. And that's best explained by actually pulling this up and showing you what I mean. So, if I come over here, for example, what we can understand is how much money are we spending on AI? How much money are we spending on Fable Fighter? Which, if you want to actually use Fable Fighter after these 3 days, it's going to be really important, right? Because they all have a certain amount of money that they cost, and Fable Fighter is twice as expensive as 4.8. We can get full breakdowns of basically per model, Claude Kern, Codex, anti-gravity, where we're spending it. And crucially, and this is one of the unfair advantage you can get, is Fable Fighter can dream for you overnight. It can go through all of your history, every message you've had with Claude, every message you've had with Hermes agent, all of your skills, and actually dynamically find for you suggestions of how you can physically improve. If you're using something that should be a skill, it can go and find that skill. It can do internet research, it can find skills that are crushing online, and give you those dynamic bits of feedback. It shows you the sources, you can control goals, you can look at memory connected to Obsidian, understand data about it. You can even go ahead and connect everything else. And this for me is where it goes from good to crazy. The fact that whether we're using any AI personal assistant, Hermes, Open Core, we can have all of that in one location. So, we can use it as a Hermes. We could, if we want to, have full conversations with um basically Fable Fighter. We can do anything we want to. We can build out this sort of ministry of experts and have various different models and orchestrate them. So, we could have Fable Fighter at the top, and we could have all these different sub-agents. There's a million things we can do. The key most important thing is that we have one location that basically masters everything that we're doing, all of our skills, um creating new skills, and managing all of our money. It has never been easier to actually build one dashboard, okay, that can actually bring you those insights. So, Fable 5 makes building your own agentic operating system more accessible, and you can even improve that. I have it working in the background. I build on this every single day for my group. It is crazy, and I'm using Fable 5 all the time to find new ways to make it better and improve it. You need to be thinking about how you can build these agentic operating systems for your life. And that takes us very nicely onto level four. And level four essentially is Now, this is probably, I'd say, one of the more more boring, but actually one of the more important systems that you can think about. Now, here's the thing. We can get Fable 5, and we need to be doing this right now, to go through and look at everything that you've built recently with the other models and give it a second pair of eyes. Go through and assess it for vulnerabilities and how it can be physically improved. And I actually didn't want to just say that it did better. I went ahead and I tested this. I gave it an example system, an example um sort of GitHub repo, and I said, "Look, I want you, Opus 4.8, to go through and check it." And I gave the exact same prompt to Fable 5. Then, I had a separate model analyze it and give me feedback on I didn't know which model was which to actually assess which one was better. Okay, and here are the results. So, we have model A, and we have model B. Which is which? Well, I'm going to say right now, A was Opus 4.8, and B was Fable 5. Opus 4.8 scored 80%, not bad. Fable 5 scored 90% And what I did is I had them all go through Okay, and actually had these to cross We had Claude, we had Codex, and Gemini doing it. And I assessed them for prioritization, coverage and depth, actionability, total. Unanimous, Fable 5 wins by a consistent 12-point margin. No greater rank than the other way, and the gap barely moves across three My num- fingers Where my fingers at? Three different models. That is absolutely solid as kind as a judgment gets. I'm even I'm even crossing that out. That's how kind of hyped up I'm about this now. But the bottom line here, the final word stripped of anything cosmetic, B is the better of you because it finds higher impact problems, triages them better, and diagnoses root causes deeper, confirmed by three independent models. But it also want to be fair about one really big caveat that we have with Fable 5, and it's a little bit of a shame, and that's the fact that they have put so many guardrails around Fable 5. It is more protected than I don't know, like wrapping a baby in like a mile of like bubble wrap. If it even smells the word like prompt injection or anything that could potentially be used to like infiltrate the US government, it will just knock it down to Opus 4.0. It is so anti- It is like anything that could even remotely be dangerous to US government, it just knocks it down a model. That's how powerful they think this model is. So, when you do start to do like security threat analysis, do not be surprised when they knock it down. I think it's like the most annoying thing ever that this is the way that it is, but just want to set your expectations that that's one of the weaknesses. It's so powerful, but the cool thing is you do actually get a load of analysis before it does knock it down, so you can still get the output. It's just a little hack. It'll just stop itself in its tracks. What I find, guys, is just run it again, and then just grab it and open a new window, and then continue with Fable 5. And then the fifth thing that's really important, and I I tell you this stuff, but I am genuinely doing it, okay? This is the biggest and best one in my view, level five, and if you crush this, it's good. It's about finding the bottleneck, okay? And we use the theory of constraints. So, the idea with this is we think about in our business, our work, what is the biggest constraining factor? What is the one thing that if we were to fix it, in this case, it's the narrows, right? What is the one thing that if we fix this, everything else would be fine? The classic example is you and I run a Lamborghini production factory. We can do 100 bonnets, we can do 500 paint jobs, but we can only produce one engine a week. It doesn't matter how good we are at everything else, if we can only do one engine a week, we will limit it. You can see guys, even my agents are pulling up new designs in the background. The idea here is that we identified the biggest constraint with Fable 5, and we give it a prompt to work through that and build an action strategy. And so, if you're not sure where to start with this, I'm going to put a link for this down below, which is the theory of constraints business review that's going to turn Fable 5 into your own personal business advisor, and it will go you through basically this entire pipeline, talking about attention, leads, conversion, delivery, retention, cash, um hours, loads of stuff. It is super super com- uh comprehensive. I've also got a list of why the prompt is built that way. Literally copy this, put it into Fable, and watch the magic. But, there's one thing you have to do before you get started on these five things, and I really want to make sure that you understand this before you leave this video. And this is exactly how to use Fable 5 going forward. Now, what do I mean when I say that? The idea here is that you want to be using Fable 5 above Opus 4.8. You'd literally do And you want to be doing that on low mode. So, if I come back over here as a for instance, you can see, right, that Fable 5 on low mode is more powerful than the high, and essentially as strong as extra high for significantly cheaper. So, this is the way that I would love you to use Fable 5 after I've done some research, and I've used the hell out of this, and how I'm going to be using it on the API once it disappears in 3 days. Remember, in 3 days' time, you can still access Fable 5, but it's going to be via the API. So, you're going to have to pay essentially $2 um as opposed to $1 for 4.8. So, it's super important that you understand that. Now, five quick hacks for you, okay? Run everything on low. That's the first thing you need to be doing is run everything on Fable 5 on low, okay? Because it beats Opus 4.8 high until it comes back beautiful. Number two, you want to tag rivals in for big reviews. So, if you're doing any code-based stuff or building out websites, you're trying to find vulnerabilities, ask it to adversarially verify it with the best ChatGPT model, which you can do with your ChatGPT subscription for $20. It's crazy. And bring in Gemini, bring in anti-gravity harness in there as well, because different models will find different things super important. Number one, whenever you do anything big with Fable 5, if you're going to, for example, you're asking for live strategy stuff, you want to do that on high or max, first of all, to do the big brain strategy thing. I want you to think about it as Einstein, okay? You can run Einstein for 1,000 pounds an hour. If you and I were renting Albert Einstein, we'd say, "Look, dude, when you're in here, let's think of our biggest problems. Then when we understand that, we can start tagging in the lower models after the fact." So, always start with Fable 5, first of all, to give you the initial website design, to give you the initial strategy. Then we bring in the Opus 4.8s and the models that are in crying in the corner, but only after we've done the initial strategic review. Second of all, and the fourth thing, you want to be looking at your contacts window. This will help you get so much more out of it, cuz you can run up to a million tokens. What I want you to do is the first, as soon as you finish a task, either basically compact the conversation, if it's another branch of that, or open up a brand new window. You can do that in Claude by literally just doing {forward slash} compact, and it'll compact the conversation. Your token cost matters here. And finally, you want to find out where sub agents parallel work goes to sub agents. They can inherit the model and the effort, so you want to set that dial before you actually spawn it. Said another way, take this as a bit of a cheat sheet. Low is going to be your default for chats, for docs, drafts. They already beat Opus. Use medium for volume work, so it builds synthesis, analysis beats Opus for max tune. Use high for your hard problems. XI is big autonomous runs, and max is one-way doors. Architecture and plans that you cannot redo. That's when we bring in the max level. So, for example, if I was building a website, I might use Fable 5 for the first 20% on high, then I'll switch out to Opus 4.8, and then maybe bring in Codex after the fact. Now, leveraging this incredible model is one thing, but there's a big problem, and that's the fact that if we don't have the right systems around the correct operating systems around it, we're not going to be able to get the best value out of it, which is why the next thing that we need to do is learn how to build one with agentic operating systems and understand how they work, which we're going to cover in this video right here.

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