Claude Fable 5 review: what the new Mythos model gets right (and very wrong)

Claude Fable 5 is the first Mythos-class intelligence model to be generally available, and I got early access to test it before launch. In this episode, I walk through what Anthropic is promising, what actually stood out when I used it on real work, and where I think it fits in your AI stack.—In this episode, we cover:(00:00) Introduction: Fable 5 is finally here(00:31) What Anthropic says about the model(05:14) Token-intensive by design(06:28) Safety classifiers and the new fallback concept(07:46) Is this or is this not Mythos?(08:30) New product launches: Managed Agents and more(09:20) Crushing benchmarks(09:55) What it’s actually like to use (the good and the bad)(11:40) Test 1: product graph spec(12:56) Test 2: designing a skills registry(14:04) Conservative on execution(14:43) Test 3: multi-agent orchestration(15:39) My takeaways—Tools referenced:• Claude Fable 5: https://www.anthropic.com/news/claude-fable-5-mythos-5• Claude Managed Agents: https://platform.claude.com/docs/en/managed-agents/overview—Other reference:• SWBench Pro benchmark: https://www.swebench.com/—Where to find Claire Vo:ChatPRD: https://www.chatprd.ai/Website: https://clairevo.com/LinkedIn: https://www.linkedin.com/in/clairevo/X: https://x.com/clairevo—Production and marketing by https://penname.co/. For inquiries about sponsoring the podcast, email [email protected].