The Globe and Mail reports in its Wednesday, June 10, edition that in April, Anthropic introduced a new artificial intelligence system called Claude Mythos but withheld it from the public due to concerns that it could aid hackers in infiltrating networks. A New York Times dispatch to The Globe reports that this warning alarmed executives and government officials about potential cybersecurity threats. Now, Anthropic is launching a limited version of Mythos, which researchers believe is safe for wider use and incorporates older technology for certain functions. Called Claude Fable 5, this new system includes additional guardrails designed to block responses related to cybersecurity, biology and other vulnerable areas. Because of these guardrails, hackers may struggle to attack computer networks using Fable. However, businesses and cybersecurity experts may also struggle to defend networks using the new system. Most queries from Claude users in areas that could be perceived as too risky, the company said, will be handled by Claude Opus 4.8. "That is the core of why we have been able to release Fable," said Anthropic's head of product management, Dianne Penn.