DeepSeek has tumbled to #51, weeks after dethroning OpenAI's ChatGPT as the most downloaded free AI app in Apple's App Store in the United States.

Since its founding in 2021, OpenAI Startup Fund has invested in over a dozen startups, including many of the hottest startups in AI.

In the fall, the company introduced technology called OpenAI o1, which was designed to reason through tasks involving math, coding and science. The new technology was part of a wider effort to build A.I. that can reason through complex tasks. Companies like Google, Meta and DeepSeek, a Chinese start-up, are developing similar technologies.

Elon Musk's Grok has overtaken OpenAI's ChatGPT, Google's Gemini, and DeepSeek to become the top productivity app on Apple's App Store.

Apple iPhone 16e faces fierce competition; OpenAI’s weekly users cross 400 million; Google nears its first retail store in India