Anthropic Unveils Claude Fable 5 and Limited-Release Mythos 5 AI Models

Anthropic has introduced two new AI models: Claude Fable 5 and Claude Mythos 5. Claude Fable 5 is the company's most capable widely released model, designed for complex reasoning and long-horizon agentic tasks. Claude Mythos 5 shares the same capabilities but is available only through a restricted limited release via Project Glasswing. The models come with API changes and specific availability details. This release marks a significant step in Anthropic's AI development, emphasizing advanced reasoning and specialized deployment.