Topic
#anthropic
- Claude Claude Fable 5 and Mythos 5 are back July 2nd Anthropic has received notice that the Department of Commerce has lifted export controls on Claude Fable 5 and Mythos 5.
- Claude Code Is Steganographically Marking Requests A security researcher claims to have found hidden Unicode markers in Claude Code that subtly alter the date string in its system prompt based on the API base URL's hostname and system timezone—apparently to flag custom gateways, proxies, or resellers (especially Chinese AI-related domains)—raising privacy and transparency concerns about undisclosed steganographic fingerprinting in a widely-trusted developer tool.
- Introducing Claude Sonnet 5 Anthropic has released Claude Sonnet 5, a more agentic and cost-efficient model that approaches Opus 4.8's performance on many tasks, shows improved safety metrics over its predecessor Sonnet 4.6, and is now available across all Claude plans and the API with introductory pricing through August 31, 2026.