January 20 – DeepSeek releases DeepSeek-R1, a large language model based on DeepSeek-V3 utilising a chain-of-thought, stating it achieves performance comparable to OpenAI-o1 across math, code, and reasoning tasks.[1] DeepSeek-R1 is open-source.
January 23 – Humanity's Last Exam, a benchmark for large language models, is published. The dataset consists of 3,000 challenging questions across over a hundred subjects.[4]
January 27
Nvidia's stock falls by as much as 17–18%, after the release of DeepSeek-R1.[5]
DeepSeek-R1 surpasses ChatGPT as the most-downloaded free app on the iOS App Store in the United States.[6]
February
February 3 – OpenAI releases Deep Research, an artificial intelligence system integrated into ChatGPT,[7] which generates cited reports on a user-specified topic by autonomously browsing the web for 5 to 30 minutes.[8]
February 6 – Mistral AI releases Le Chat, an AI assistant able to answer up to 1,000 words per second.[9]
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