Anthropic introduced Mythos as part of a public campaign that AI Now Institute describes as an attempt to demonstrate the company's openness to working with an external audience. The synopsis also states that release restrictions hindered independent experts' ability to assess Anthropic's statements.

Why this matters: a public demonstration is not the same as independent verification. AI Now Institute quotes the assessment of its Chief AI Scientist Heidy Khlaaf, who described Mythos as a strategic announcement of the company's willingness to work. The materials available in the package are not sufficient to verify Mythos's technical specifications or the scale of the restrictions.