Axios: Anthropic’s most powerful AI yet

Posted on June 10, 2026 by michelleclarke2015
 Anthropic’s most powerful AI yet
 
Illustration: Sarah Grillo/AxiosAnthropic is releasing a general-use Mythos-class AI model with better capabilities than anything it’s published before, Axios’ Madison Mills and Sam Sabin report.

The company once deemed this new class of model so disruptive that existing safeguards were insufficient, and it restricted access to just a handful of trusted organizations.

Now it’s releasing a public version less than three months later.

🤖 The new Fable 5 model is better at knowledge work, software engineering, scientific research and more — outscoring competing models from OpenAI and Google DeepMind, Anthropic says. It includes safeguards to prevent coders from using it to hack infrastructure or ask about sensitive biological capabilities.

👾 Dianne Penn, Anthropic’s head of product management, research and labs, says the company ran Fable 5 through internal and external testing to ensure safety.

Penn added that Anthropic is being “deliberately more conservative” at launch.

Some legitimate scientific or security work could be routed to the company’s older, less-capable models — at least for now.

🤑 Fable 5 costs twice as much as Anthropic’s Opus models.

That makes it the company’s most expensive offering yet, at a time when some users and companies are facing ballooning AI budgets.

Anthropic argues that the more powerful model translates to a lower cost per task. Go deeper … Get Axios AI+.
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About michelleclarke2015

Life event that changes all: Horse riding accident in Zimbabwe in 1993, a fractured skull et al including bipolar anxiety, chronic fatigue …. co-morbidities (Nietzche 'He who has the reason why can deal with any how' details my health history from 1993 to date). 17th 2017 August operation for breast cancer (no indications just an appointment came from BreastCheck through the Post). Trinity College Dublin Business Economics and Social Studies (but no degree) 1997-2003; UCD 1997/1998 night classes) essays, projects, writings. Trinity Horizon Programme 1997/98 (Centre for Women Studies Trinity College Dublin/St. Patrick's Foundation (Professor McKeon) EU Horizon funded: research study of 15 women (I was one of this group and it became the cornerstone of my journey to now 2017) over 9 mth period diagnosed with depression and their reintegration into society, with special emphasis on work, arts, further education; Notes from time at Trinity Horizon Project 1997/98; Articles written for Irishhealth.com 2003/2004; St Patricks Foundation monthly lecture notes for a specific period in time; Selection of Poetry including poems written by people I know; Quotations 1998-2017; other writings mainly with theme of social justice under the heading Citizen Journalism Ireland. Letters written to friends about life in Zimbabwe; Family history including Michael Comyn KC, my grandfather, my grandmother's family, the O'Donnellan ffrench Blake-Forsters; Moral wrong: An acrimonious divorce but the real injustice was the Catholic Church granting an annulment – you can read it and make your own judgment, I have mine. Topics I have written about include annual Brain Awareness week, Mashonaland Irish Associataion in Zimbabwe, Suicide (a life sentence to those left behind); Nostalgia: Tara Hill, Co. Meath.
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