Anthropic just opened the gates a little wider on the AI model it has refused to ship to the public. Project Glasswing, the company's cybersecurity coalition built around Claude Mythos Preview, is growing from roughly 50 launch partners to around 200, with approximately 150 new organizations across more than 15 countries getting access to a model Anthropic considers too capable to release broadly.

The expansion targets sectors that were thin in the original cohort. The new group covers power, water, healthcare, communications, and hardware, and many of the new partners are vendors whose codebases underpin critical infrastructure systems. Sources told CyberScoop that Rubrik, a cloud security and data management company, is part of the latest round, though Anthropic itself has not published a roster.

Why a model nobody can buy keeps making news

Claude Mythos Preview is not a product you can call from the API in the usual sense. It is a frontier model Anthropic has deliberately gated because of its offensive cyber capabilities. The original cohort, announced in April, included Amazon Web Services, Apple, Broadcom, Cisco, CrowdStrike, Google, JPMorganChase, the Linux Foundation, Microsoft, NVIDIA, and Palo Alto Networks as launch partners, with access priced at $25 and $125 per million input and output tokens via the Claude API, Amazon Bedrock, Google Cloud's Vertex AI, and Microsoft Foundry. Anthropic committed $100M in model usage credits to cover Project Glasswing participants throughout the research preview.