The First 48 Hours of Claude Fable 5: What 400 Builders Are Actually Building
What Mythos is allowing founders to build
80.3% on SWE-Bench Pro made autonomous software development commercially viable.
I analyzed 400 tweets from Claude Fable 5’s launch to identify exactly what builders are creating with Anthropic’s first ‘Mythos-class’ model.
The results reveal specific use cases where Fable 5 enables entirely new product categories.
In this issue you’ll find:
The 3 Use Cases Where Fable 5 Breaks Previous Limits (With Live Demos)
Why Builders Are Abandoning Opus 4.8: The Performance Jumps That Matter
One-Prompt Production: The New Business Model for AI Development
Check it out with the free trial (no strings attached), or jump straight into premium if you’re ready for the full scoop👇
With the premium access you’ll get also access weekly to:
What’s happening now (and where the money’s headed).
Who’s already building it (so you can invest, partner, or steal their playbook).
Attio is the AI CRM that compounds revenue around the clock.
It gives your team the foundation for moving fast, staying sharp, and scaling without breaking. Every customer signal, from emails and meetings to product usage, billing, support, and agent activity, is synced from day one, giving you a live picture of every account.
With Attio, you’ll get:
Revenue agents, workflows, and automations across every stage of your motion
Instant answers to anything you Ask Attio about your business
Access to your customer data wherever you work, through Attio’s MCP, API, and App SDK
30,000+ teams use Attio to drive more revenue at scale. Are you one of them?
