Anthropic disclosed that a small group of unauthorized users gained access to its newly released Claude Mythos model on the day the company announced a limited rollout. According to Bloomberg, the intruders guessed the model’s online location using details leaked from a prior breach at data‑training firm Mercur and insider knowledge from a contractor who had evaluated Anthropic’s models. Anthropic said it is investigating the incident and reviewing its monitoring systems, which were designed to log and track model usage. The breach, described by security researchers as a standard “educated guess” attack rather than a sophisticated exploit, did not appear to target the model’s advertised cybersecurity capabilities. The episode raises questions about the robustness of Anthropic’s security controls for a product it has marketed as a “watershed moment” for defending digital infrastructure. Read more →

The National Security Agency has begun using Anthropic’s new Mythos Preview, a general‑purpose language model touted for its strength in computer‑security tasks. Sources familiar with the rollout say the NSA is one of roughly 40 agencies granted access and that usage is expanding within the department. The move comes despite a months‑long feud between the AI firm and the Pentagon, a February order from former President Trump to halt government use of Anthropic services, and ongoing lawsuits over the company’s designation as a supply‑chain risk. Read more →

Anthropic has unveiled Claude Opus 4.7, the company’s most capable model offered to the public to date. Marketed as a step up from Opus 4.6, the new system promises stronger performance on software‑engineering tasks, improved image analysis, and more creative output for slides and documents. While Anthropic continues to restrict its flagship Mythos Preview to a handful of partners, Opus 4.7 ships with added cybersecurity safeguards and the same token‑based pricing as its predecessor. Early adopters include Intuit, Shopify, Databricks and other tech firms eager to test the model’s enhanced capabilities. Read more →