Amazon owns a slice of Anthropic. The WSJ says its CEO helped get Fable 5 switched off (wsj.com)
Amazon researchers, per the Wall Street Journal, strung prompts together until Fable 5 produced material useful for cyberattacks, then carried that to Washington rather than to Anthropic's security inbox.
The detail the thread keeps circling: Amazon is one of Anthropic's largest shareholders and its cloud partner. A security favor and a competitive shove are hard to tell apart when one company does both.