I cannot believe it, the biggest model

release of the entire year, maybe of all

time, happened today, just now. We are

about to find out if it lives up to the

hype, Claude Fable 5, aka Claude Mythos.

That's right, Anthropic has released

Claude Mythos 5. It is the safe version

of Claude Mythos, and as you can see

here, it not only wins every single AI

benchmark ever made, it dominates every

AI benchmark ever made. But are

benchmarks real? Is it as good as all

the benchmarks you see here? Cuz a lot

of time benchmarks are a little fake.

We're about to find out. For those who

don't remember, Claude Mythos was the

model that Anthropic announced a few

months ago, but they said, "Hey, you

normies, you can't use it, a little too

dangerous for you. You get your hands on

this, the entire world is ending." It is

available in all Claude platforms, so

you can use in Claude Code CLI, in the

desktop version, as well as in the chat

in Coda. I'm going to show you how to

set it up in a second, show you how to

get more out of it. We're about to go

through the keys of Claude Fable, so how

you treat it different than Opus. So

before we get into actually using the

model, here's how you need to think

differently about Claude Fable 5. Before

you asked yourself, is Claude doing the

work right? You tell Claude Code to do

something, you tell Claude to do

something, and then you go and you check

to see if it did the right thing. You

test it. Now it's different. This is a

subtle shift in mentality. Now you are

saying, is Claude doing the right work?

You can now be confident Claude is

building things the right way. It's not

building buggy code. Now you just need

to make sure it's doing the right work.

How do you do that? Well, through loops,

and I'm going to go through loops in a

second. This has been the talk of the

town for the past week. I'll show you

how to use loops using a few different

methods inside Claude Code in just a

second as well. This basically gives

Claude the ability to work autonomously

non-stop, right? For days and days and

days on end. We'll go through that very

shortly. So, here are the three tips

Anthropic gave when it came to using

Fable 5. Treat Claude like a thought

partner. This is quite literally super

intelligence. And what people were doing

before with Claude was they'd begin work

and they'd say, "Okay, Claude, do this

next. Do this next. Do this next." next.

Not anymore. Now you need to treat it as

an equal, as an equal collaborator on

what you're building. So, before you

build something, you need to go, "Hey,

what are your thoughts on this? How

would you change this? How would you do

it different? How would you approach

this? Would you do something completely

different?" You treat it as an equal

partner in what you're building. Two,

you give Claude goals. So, instead of

telling Claude what to do next, you just

give it a high-level goal and it will

find its way there. Typically, the way

we've been combined coding up till now

is you might have a goal 10 steps down

the path and you do each step with

Claude one by one by one by one. Not

anymore. You just give Claude the end

goal and it finds its way there. So, you

let it be more autonomous. And then

lastly, this is the last tip here

Anthropic was giving is just be more

ambitious. You want to now push the

limits of what you were doing before. If

you thought something was impossible to

do with AI before, go for it now. Be

more ambitious and I will show you how

to do that a little bit uh later in the

video as well. Okay, so let's get into

my recommendations on how to get the

most out of Claude Fable. I am doing

this inside of Claude code in the CLI.

I'm using a little app called Ghosty,

which is a nicer version of the terminal

to do this. You can feel free to

download that for free if you want. I'm

hearing from a lot of people Fable is

not showing up in the Claude desktop app

just yet. So, I'd recommend coming in

here. On top of that, I'm hearing from

some people Fable is not showing up

inside the model picker. So, make sure

to run this as well. {slash} model claw

{dash} fable {dash} five. Hit enter.

Even if it's not in your picker, even if

your claw hasn't updated yet, you can

run that and you will be on the new claw

fable five. I recommend going auto mode.

So, shift tab, go to auto mode. It's so

smart you don't need it to ask you for

permissions anymore. I know that makes a

lot of people upset when I'm like, "Why

are you telling people to do dangerous

things?" It's smart enough. Do auto

mode. It's going to work. It's not going

to do anything crazy. From an effort

perspective, if you do {slash} effort,

I'd recommend starting off on high. This

model absolutely torches tokens. It does

a tremendous amount of thinking. My

recommendation Opus was extra high.

This, I think you should go with high.

And then you can tune it up and down

based on the performance you're getting.

So, I have it on high, auto mode, fable

five. So, let's talk about how to get

the most out of fable five. What is the

best way to put it in these loops? These

loops everyone's talking about. This is

the strength of fable. It is so smart.

You don't need to give it little micro

steps. You give it a massive goal and it

attacks that massive goal. So, you can

follow along with me here. Let's do

this. What we're going to do is describe

what we want to build. But, we're not

going to build it just yet. What we're

going to do is use what I call advanced

plan mode first. This isn't just a

regular plan mode. This is an advanced

plan mode where I'm going to have claw

fable five ask me a bunch of questions

to fully understand in depth what I want

to build. You should be doing this, too.

Once we have this advanced plan mode

built out, then we will give it a goal

which is the big loop it runs in to

build this huge idea. So, what we're

going to build today is a personal

productivity app. This is everything.

This is your to-do list, Kanban board,

calendar, note-taking app, like your

Notion on top of that. This is

everything we're building entire complex

app, and we're going to build it all in

one goal. So, typically when using like

Opus, you'd build each one of those

tools out one by one by one. Fable,

we're doing it all at once. So, watch

how we do this. So, here's the prompt

we're going to use. I'll put this down

below so you can copy and paste it. Feel

free to pause right here and grab it so

you can do this with me. I want to build

out a personal productivity tool. I want

it to include to-do list, Kanban board,

calendar, comprehensive note-taking app,

Pomodoro timer, and even a little game I

can play to take a break. Before

building anything, please ask me any

questions you have on this idea so we

can build a fully fleshed out app. I'm

going to hit enter, and he's going to

first start asking me any questions it

has to develop this idea. This is not

only a good exercise to get the AI

up-to-date in what you want to build,

but also it's a good exercise for you to

kind of think through things to fully

flesh this out. So, where do we want to

build this? Let's make this a web app.

How should your data be stored? Let's

make it local only so it's nice and

easy.

What How connected should the features

be to each other? Definitely deeply

integrated. What kind of break game

sounds fun? Let's do a classic arcade

game. I like that. And now it fully

fleshes out and we're going to submit

our answers. Now it's doing more

thinking, and now it has even more

questions for us. Typical plan mode,

just a few questions, then it builds.

Here we're asking to ask as many

questions as it needs to get this

working.

What visual style do you want? Clean and

minimal, playful and colorful, retro

terminal? I kind of like the idea of

playful and colorful. Let's do that. How

powerful should the note-taking be?

Let's do a daily journal style. What

should the calendar handle? Definitely

task and events.

And anything special for the Pomodoro

timer? Let's do it attach it to tasks.

As well as stats and streaks. I like

that as well.

And then let's hit submit and we'll

submit answers there. All right, look at

this. It gave me an entire massive

command uh to build this out. Let's do

this. We're going to copy and paste

this. It has everything in it. And then

what we're going to do is /goal and then

paste that in and hit enter. And then

now what it's going to do is put it in a

loop to build out this entire thing. So

what's technically going to happen here

is now the agent will go start building

this app out and every once in a while

check back in, okay, is it accomplishing

the goal we gave it? Is it has it hit

the goal in the success criteria in our

prompt? This is going to ensure it does

not stop working until the success

criteria is met of what's inside the

prompt. And because we did the advanced

plan mode it has a really comprehensive

view into what we actually want built.

That's the key to doing any of these

advanced tasks is the AI no offense to

you guys. I mean you're really smart cuz

you watch my channel. But the AI at this

point probably smarter. So you should

lean on it to do any sort of thinking

and planning. Right? You giving it a

command to do something advanced it

probably can command itself to do that

advanced thing better. So you want to

say, "Hey, how would you do this? What's

the best way to do this? Can you plan

this out for me?" All right, looks like

it is all done. It is built, verified,

and running. It named it Fable. I think

uh Anthropic might be feeling themselves

a little bit because the model's named

Fable and it's now naming all the apps

it builds Fable. Uh let's take a look at

this. Let's see how it's looking. So I'm

going to be honest, I think the UI is a

little ugly, but to be honest, I also

answered the question to make it

colorful and playful. So I guess it is

very colorful and playful. Let's see

what we got. It looks like it has

absolutely everything in it. So let's do

a quick task. Edit the Fable 5 video.

Hit enter on that. Boom, it's on your

plate. That's very, very nice looking.

Let's check out the calendar. Full

calendar. Let's give it a an event right

now. Check video performance.

We'll give it tomorrow. We'll give it a

date for Thursday. We'll give it a

color. Add the event. Boom, there. This

is a fully working calendar. Let's see.

Here's our week view. Week view. Can add

the task there in the calendar invites

there. Love that. Notes. Full

note-taking section. Feeling great about

Fable. There. Boom, goes into the past

entries. That's very nice. Pomodoro

timer. Let's start our Pomodoro timer.

Okay, the focus. Look, it's got streaks.

It's got everything. It's got a full

tracker of how many times you use the

Pomodoro timer. Let's check out the

arcade. All right, it is a snake game.

That's a good looking snake game.

Makes the snake longer when I eat the

strawberries. I don't know if the

strawberry is a little dig at OpenAI

there, but there we go. Let's see what

happens when we die again and there.

Boom, adds our score. Kanban board.

There's our task. Can we click and drag

it? It did everything. It built

absolutely everything we asked for. Zero

bugs. It just works works. The tasks are

there. Everything's there. We have the

nice dashboard. The key is goals. The

key is loops. If you are new to goals in

loops, do not worry. You go into Claude

code. You ask, "Hey, I want to put this

in a loop. I want to make a goal

statement. Please tell me what goal to

make or what loop we should be using."

And it will give it to you. I'll give

you a quick little bit of an advanced

workflow as well. If you're using other

tools, other project management tools

like Linear, like you see here, Claude

can plug into it. An interesting loop we

can do is we can say something like

{slash} loop and then every we'll say

one hour check to see if there are any

new Linear tasks you can take. And now

what it will do is every hour go into

our linear, our project management tool,

and see if there's any coding task it

can take and use. That's a very strong

way to use loops in here as well. This

is how you need to be thinking in loops

because these models are so smart and

powerful now. One last interesting point

here. By the way, if you learned

anything at all, make sure to leave a

like down below, subscribe, turn

notifications. All I do is make amazing

videos about AI. One last thing I want

to talk about real quick is this is only

available in subscriptions for the next

2 weeks. On June 22nd, they take it out

of the subscriptions and you have to pay

via API. It is double the price as Opus.

It's actually a fraction the price of

ChatGPT 5.5 Pro, but it is double the

price of Opus. This might be the

beginning of the end of subsidized

subscriptions. That's something

interesting to watch here. It is the

first model a frontier lab has released

that's not available in subscriptions.

So, something interesting note, if you

subscribed at the moment, make sure to

test it out. You have a couple weeks to

do it. Then you'll have to pay via API

usage. That is Claude 3 Opus. Let me

know down below what your experiences

have been so far and what you're

building with it. I'm very curious to

hear. More videos coming on using it

with Hermes and using an open claw.

Subscribe and turn notifications for

that and I will see you in the next

video.