A post on Hugging Face claimed the leak of Anthropic's unreleased "Mythos-class" model, allegedly 8 terabytes in size. The post quickly drew skepticism from the community. Users noted the file size and questioned the legitimacy of the release, drawing comparisons to previous fake leaks such as a purported "Claude 2.1" model from a few years prior.
That earlier incident was later identified as a renamed open-source model. The current leak reportedly contains a log line suggesting training activity extending into October 2026, which further fueled doubts about its authenticity. Commenters highlighted that running a model of this scale would require significant technical resources, specifically 8 terabytes of RAM.
The discussion also touched on the broader issue of model security, noting that while weights constitute data and cannot be copyrighted, trade secrets may offer some protection against unauthorized distribution. Despite the doubts, some users suggested the file structure appeared plausible at first glance, though running the model remained a major hurdle for all but the most equipped operators.
Source: Hacker News · Summarized by HeadlinesBriefing