This Sunday, the US government has abruptly blocked foreign access to Anthropic’s powerful new AI models, Fable 5 and Mythos 5, citing national security concerns. Both NewsBytes and Moneycontrol.com confirm this unprecedented move, which comes after warnings from tech leaders, including Amazon CEO Andy Jassy.

Anthropic had recently launched Fable 5, designed for "agentic work" and Mythos 5 for vetted cyber defenders. TheSequence reports these models scored an impressive 80.3% on SWE-Bench Pro.