DeepSeek rattled Big Tech. Here’s what the CEOs of Apple, Meta and Microsoft are saying

Earlier this week, Chinese artificial intelligence startup DeepSeek sparked a sell-off of global tech stocks that lost the AI-driven stock rally $1 trillion in value.

The Hangzhou-based company launched its open-source DeepSeek-R1 AI reasoning models the previous week, declaring them on par with those from OpenAI and Anthropic. In December, the startup released DeepSeek-V3, an AI model it said cost just $5.6…