Anthropic Launches Claude Mythos With Advanced Reasoning

Anthropic confirmed this week that it has finished training a new large language model called Claude Mythos and is piloting it with early customers after a CMS configuration error exposed about 3,000 assets and a draft launch post. Internal documents say Mythos will power a pricier 'Capybara' tier that outperforms Claude 4.6 Opus at reasoning and vulnerability discovery, prompting cautious early access.
Scoring Rationale
High novelty and industry scope, backed by Anthropic confirmation; limited public technical details constrain immediate adoption.
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