A group of Discord users gained unauthorized access to Anthropic's highly restricted AI tool, Mythos Preview. The users reportedly exploited information from a data breach of an AI training startup and made an educated guess about the model's online location. While the group has only used the tool for benign purposes like building simple websites, they also gained access to other unreleased Anthropic AI models. AI
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IMPACT Highlights the ongoing challenge of securing restricted AI models and potential for misuse even by non-expert actors.
RANK_REASON Unauthorized access to a restricted AI tool, but not a frontier model release or major security flaw.