Anthropic limits access to Mythos, its new cybersecurity AI model A select group of customers is testing the Claude Mythos Preview. https://arstechnica.com/ai/2026/04/anthropic-limits-access-to-mythos-its-new-cybersecurity-ai-model/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social