By Guardian staff reporter
Publication Date: 2026-06-09 22:28:00
Anthropic, the maker of the Claude artificial intelligence (AI) models, made a new version of its technology available to the general public on Tuesday while restricting its use in sensitive areas.
The model, called Fable 5, is the first model to be made generally available in the company’s new Mythos class – its most advanced line of AI technology, which was unveiled in April but was reserved for months to a small group of partner institutions because of cybersecurity concerns.
Anthropic promoted Fable 5 as useful for writing and debugging software code, answering complex research questions, and analyzing images.
In parallel, Anthropic is offering an unrestricted version, Claude Mythos 5, for companies and organizations that already have access to this family of models – including cybersecurity partners enrolled in the Project Glasswing program.
This select group expanded to approximately 200 organizations in more than 15 countries in early June and is expected to continue to grow.
Anthropic has restricted access to…
