A draft blog post left in an unsecured data cache revealed a new model tier called Capybara that Anthropic says is more capable than anything it has built, with the company flagging "unprecedented" cybersecurity risks. A leaked draft blog post revealed that Anthropic is testing a new AI model, Claude Mythos, which it internally describes as by far its most powerful system to date. The model, part of a new "Capybara" tier, reportedly delivers dramatically better performance than Claude Opus 4.6…
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