Anthropic pre-IPO shares slide after US orders shutdown of Fable 5 and Mythos 5

Anthropic’s pre-IPO market sold off after the US government ordered the company to shut down access to its most powerful AI models, Fable 5 and Mythos 5. According to CoinDesk, the Anthropic perpetual on Hyperliquid fell 3.7% on Saturday to about $1,627 after trading above $1,800 following the Fable 5 launch; open interest is about $8.6 million. Anthropic said it received the directive at 5:21 p.m. ET on Friday, citing national security authorities, and executed a full shutdown after being told of a method to jailbreak Fable 5. The company disputed the evidence and said it will share more details within 24 hours.