ASML Holding NV, a key semiconductor equipment supplier, saw its stock drop more than 8% on Monday as markets reacted to the disruptive launch of Chinese AI startup DeepSeek's R1 model.

Earlier, it was known that DeepSeek rose to the top of Apple's App Store chart in the United States, overtaking OpenAI's ChatGPT, which has fallen to third place. The app's unexpected success in competing with Western AI giants may raise doubts about the sustainability of current AI investment strategies.

With superior performance in tasks ranging from advanced mathematics to natural language processing, DeepSeek-V3 has outperformed even the most advanced models, including GPT-4o, in key metrics.

At 9:12 am CET, ASML's shares plummeted 8.56% to sell at €640.70.