The DeepSeek AI chatbot, released by a Chinese startup, has temporarily dethroned OpenAI’s ChatGPT from the top spot on Apple’s US App Store.The app is completely free to use, and DeepSeek’s R1 model is powerful enough to be comparable to OpenAI’s o1 “reasoning” model, except DeepSeek’s chatbot is not sequestered behind a $20-a-month paywall like OpenAI’s is. Also, the DeepSeek model was efficiently trained using less powerful AI chips, making it a benchmark of innovative engineering.I’ve tested...