Alleged Mythos Class Anthropic Checkpoint Leak

An alleged leaked checkpoint of Anthropic's unreleased "Numbat" model—a ~14 trillion parameter Mythos-class AI pulled mid-pretraining—has been published online with 772 shards totaling 7.72 TB of model weights. The leak is claimed to be verified through references to "Numbat" found in Anthropic's Claude Code source leak from March 2026, along with consistent internal tensor architecture and file integrity checks. The checkpoint includes complete model architecture files and reference implementation code needed to load and potentially run the model.