Days after Chinese upstart DeepSeek revealed a breakthrough in cheap AI computing that shook the U.S. technology industry, the chief executives of Microsoft and Meta defended massive spending that they said was key to staying competitive in the new field.

Satya Nadella thinks that AI will scale after DeepSeek’s secrets become commoditized

Big Tech’s multi-billion dollar spending on artificial intelligence will be under investor scrutiny this week — even more so after China’s DeepSeek sent shockwaves through Wall Street and Silicon Valley with a cheap yet competitive AI model.

Meta has defended its $65bn (£52bn) investment in artificial intelligence (AI) days after US tech stocks wobbled in the wake of Chinese AI app DeepSeek's sudden rise. Chief executive Mark Zuckerberg said to investors on Wednesday there was a lot to learn from DeepSeek,