Chinese startup DeepSeek's artificial intelligence challenges major U.S. tech companies like Meta and OpenAI. Here's why.

OpenAI has accused Chinese AI start-up DeepSeek of using its proprietary models to train an open-source competitor.

DeepSeek is causing havoc throughout the AI industry. U.S.-based tech companies that have heavily invested in AI saw their stocks take a tumble this week after the China-based startup released a new AI model on par with OpenAI's latest model,

DeepSeek is the biggest story in AI since ChatGPT hit the market. It showed up out of the blue and beat out the best AI models on the market at a fraction of the cost. However, it’s mostly known for the controversies that are piling on.