Claude Fable 5 and Mythos 5: Capabilities

Don't Worry About the Vase Podcast · Jun 19, 2026 · 1h 32m

The Don’t Worry About the Vase Podcast is a listener-supported podcast. To receive new posts and support the cost of creation, consider becoming a free or paid subscriber.

* 00:00:00 - Introduction

* 00:01:11 - The Official Pitch

* 00:04:10 - Technical Details

* 00:04:34 - The System Prompt and Jailbreak

* 00:06:49 - Benchmarks

* 00:17:52 - Other People’s Benchmarks

* 00:25:01 - The Classifiers Are Not Messing Around

* 00:26:56 - The Classifiers Need Work

* 00:32:26 - The Classifiers Have Consequences

* 00:33:24 - First Hit Is Free

* 00:34:01 - How Easily We Forget

* 00:35:10 - Data Retention…