DeepSeek heated up an AI race between China and the US in January after launching an open-source version of its reasoning AI model, R1. Unlike its American rival ChatGPT, the Chinese bot is freely available without a subscription, which has helped it rapidly become the most downloaded app on Apple’s and Google’s stores.An artificial intelligence pioneer has questioned the sustainability of ChatGPT creator OpenAI, noting that Chinese rival DeepSeek has been trained at a fraction of the cost. What is your take on ChatGPT spending , is it sustainable ?