OpenAI's new "GPT-4o" model, capable of real-time translation, has had a significant impact on Duolingo, causing its stock prices to plummet. The advanced AI, which can see, hear, and speak like a human, led many to question the need for traditional language learning platforms. As a result, Duolingo's shares dropped from around $250 to $177.

Despite a slight recovery, the future remains uncertain. GPT-4o's impressive real-time translation abilities pose a considerable threat to language learning platforms, though Duolingo might navigate this challenge better than lesser-known competitors.