@claudeai Introducing Claude Fable 5: a Mythos-class model made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available. The longer and more complex the task, the larger Fable 5’s lead over our other models.
Releasing a model this capable comes with risks. Without safeguards, Fable 5’s capabilities in areas like cybersecurity could be misused to cause serious damage, so queries on a narrow range of topics fall back to our next-most-capable model, Claude Opus 4.8. That happens, on average, in less than 5% of sessions.
We’re also launching Claude Mythos 5 for a small group of cyber defenders and critical infrastructure providers: the same underlying model, with the safeguards lifted in some areas.
Claude Fable 5 is available everywhere today. Read more at anthropic.com/news
The video features two Anthropic employees, Alex Albert and Angeli Jain, announcing the launch of their new AI model, Claude Fable 5. They explain its advanced capabilities while detailing the safety-driven origin story, revealing that a previous, more powerful model was withheld from public release due to its potential for misuse in cybersecurity. The narrative emphasizes the company's commitment to safety by explaining the new model's safeguard systems, which redirect high-risk queries to a less capable version, before concluding with a call for users to apply Fable 5's power to solve important, complex problems.
Today, we're launching Claude Fable five, the most capable model we've ever released to the public.
Visual hook · 10%
A man in a dark collared shirt speaks energetically and directly to the camera in a professionally lit, aesthetically pleasing studio with soft background lighting and architectural arches.
[06]
Hook template
Steal this for your own video
Today we're launching [product name] — the most [superlative claim] we've ever released.
— Today we're launching the Apex Pro — the most powerful home espresso machine we've ever released.
— Today we're launching our new coaching program — the most comprehensive fat loss system we've ever built.
— Today we're launching version 3.0 — the most intuitive project management tool we've ever shipped.
[07]
Hook and payoff
The promise the opener makes, and how the video pays it back
Hook
A direct, superlative announcement that establishes the product's top-tier status and grabs immediate attention.
Payoff
A user-centric conclusion that transfers the power and potential of the product to the audience, framing them as the key to unlocking its true value and ending on an inspiring, open-ended note.
[08]
Narrative framework
The structural pattern this video runs on
Framework
The Responsible Power-Up
Frame a new product's launch not just by its power, but by a story of overcoming a previous, more dangerous version, thereby establishing credibility, safety, and a higher purpose before challenging the user to wield this new, responsible power.
1
The Superlative Launch
Introduce the new product/idea with a bold claim of superiority or uniqueness, establishing its high status from the start.
2
The Dangerous Predecessor
Build credibility and narrative tension by revealing a past challenge or a more powerful but flawed version that was responsibly withheld from the public.
3
The Ethical Fork
Detail the responsible, user-centric decision made when faced with the past challenge, positioning the creator as a trustworthy guide who prioritizes safety over raw power.
4
The Guiding Principle
Articulate the core philosophy or mission that justifies the responsible decision and underpins the new product, providing a 'why' for the audience to connect with.
5
The Technical Solution
Provide a concrete, logical explanation of the mechanism that makes the new product safe and effective, often using a second voice or expert to add authority and variety.
6
The Purposeful Limitation
Frame any safety-related trade-offs not as a weakness, but as an intentional and beneficial design choice that enables broad, safe access.
7
The Power Pivot
Re-center the narrative on the new product's immense capabilities and broad applications, fulfilling the hook's initial promise of power after establishing a foundation of safety.
8
The Aspirational Challenge
Shift focus from the product to the user by posing a grand, open-ended question about the significant problems they can now solve with this new tool.
Themes
Technological advancement
Responsible innovation
AI safety and ethics
Problem-solving
Techniques
Direct address
Storytelling
Expert testimony
Visual metaphor
Post caption
Introducing Claude Fable 5: a Mythos-class model made safe for general use.
Its capabilities exceed those of any model we’ve ever made generally available. The longer and more complex the task, the larger Fable 5’s lead over our other models.
Releasing a model this capable comes with risks. Without safeguards, Fable 5’s capabilities in areas like cybersecurity could be misused to cause serious damage, so queries on a narrow range of topics fall back to our next-most-capable model, Claude Opus 4.8. That happens, on average, in less than 5% of sessions.
We’re also launching Claude Mythos 5 for a small group of cyber defenders and critical infrastructure providers: the same underlying model, with the safeguards lifted in some areas.
Claude Fable 5 is available everywhere today. Read more at anthropic.com/news
Text overlays
contextual · beginning
Alex Albert
contextual · beginning
Alex Albert
Research Product Management
informational · beginning
Fable
contextual · middle
Claude Mythos Preview
contextual · middle
Angeli Jain
Safeguards
contextual · middle
Angeli Jain
Safeguards Product Management
informational · middle
Fable 5
informational · middle
Opus 4.8
branding · end
ANTHROP\C
Transcript
Today, we're launching Claude Fable five, the most capable model we've ever released to the public. Fable five is a Mythos class model, with safeguards that make it ready for general use. We didn't broadly release our previous model with this level of capability, because when we finished training and testing it, we saw that the model, Cloud Mythos Preview, was finding thousands of cybersecurity vulnerabilities. A model that can find flaws like that can also be used to exploit them. So instead of releasing it, we handed it to the people who protect the world's critical software rank put it to work fixing the holes before someone could break through them. It was the right call for the moment, but it was never the goal. We believe powerful AI should be safe and accessible. That's why we went to work on Claude Fable five. Every Claude model has safeguards to keep it from doing harm. Fable needed more cautious ones than anything we'd built before. Our safety systems for Fable five automatically review requests that touch on high risk areas like cybersecurity or biology. Those requests are then redirected to Opus four point eight. We do that intentionally no people can continue to benefit from the capabilities of a powerful model like Fable without the cyber and biology risks that come with it. The safeguards are broad today, but we'll keep refining them so that they're better at allowing safe requests. We built Claude Fable five for your most ambitious work. It can stay with a problem far longer than any model before it. It's highly autonomous and can operate for days without intervention. And it's not just coding. It can take on projects in finance, research, economics, law, complicated tasks that used to need constant supervision. So point it at something that matters. What's the problem we'll look back on and wonder why it took so long to solve? We know what Cloud Fable five can do. The interesting part is what you'll do with it.
