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

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Text version: https://stenobird.com/podcast/how-i-ai-7304222/claude-fable-5-review-what-the-new-mythos-model-gets-right-and-very-wrong.md
Podcast: [How I AI](https://stenobird.com/podcast/how-i-ai-7304222)
Published: 2026-06-09T18:28:35+00:00
Episode link: https://podcasters.spotify.com/pod/show/pen-name/episodes/Claude-Fable-5-review-what-the-new-Mythos-model-gets-right-and-very-wrong-e3kifk4
Audio file: https://anchor.fm/s/1035b1568/podcast/play/121240644/https%3A%2F%2Fd3ctxlq1ktw2nl.cloudfront.net%2Fstaging%2F2026-5-9%2F425823246-44100-2-7eb52f340db5.mp3
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Duration seconds: 1044

## Resource

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 jordan@penname.co.

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