# Anthropic offers Fable 5.2 publicly while restricting Mythos 5.2 access

_Published Tuesday, November 10, 2026 at 1:19 PM EST · AI · Latest · Tier 2 — Notable_

![Anthropic offers Fable 5.2 publicly while restricting Mythos 5.2 access — Primary](https://s.yimg.com/lo/mysterio/api/60d64db61bb66396d5cb40b99e10cc37461d30ef61e3e497d0aba1dd89b2ea43/lightyear_networkapi/resizefill_w1200%3Bquality_80%3Bformat_jpg/https%3A%2F%2Fmedia.zenfs.com%2Fen%2Fgadget_review_articles_822%2F4df38e5d45ddb4b96d78e9489c1822e3.jpg)

Anthropic has announced publicly available Claude Fable 5.2 and restricted-access Claude Mythos 5.2, Yahoo reported. Fable supports coding, reasoning, vision, science and extended agent tasks; Mythos requires organizations to clear cybersecurity and life-sciences verification programs despite sharing the same underlying capabilities.

Anthropic says both models generate outputs roughly 30% faster than their predecessors, with pricing of $8 per million input tokens and $40 per million output tokens. Its demonstrations include a functioning operating-system prototype produced by more than 1,000 coordinated agents over roughly eight days. Those results are company claims, and the operating system is a prototype rather than production-grade software.

## Sources

- [YAHOO!](https://tech.yahoo.com/ai/claude/articles/anthropic-claims-claude-models-solve-155650433.html)

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Canonical: https://techandbusiness.org/newswire/gkNVyBrIRl18FfUBIi_HiO
Published: 2026-11-10T18:19:19.374Z
Story chronology: 2026-11-10T15:56:50.000Z
Retrieved: 2026-11-10T20:08:38.027Z
Publisher: Tech & Business (techandbusiness.org)