Anthropic's Fable shutdown is a big moment for open-source AI

Anthropic shut down access to its Fable 5 and Mythos 5 AI models to comply with U.S. export control directives citing national security concerns, forcing all customers to lose access immediately. This incident highlighted a key risk for companies relying on closed-source AI models (proprietary systems run by companies rather than made publicly available), driving increased interest in open-source alternatives (AI models whose code is publicly available and can be downloaded and run on a company's own servers) that companies can control themselves.