The Yi-9B model, a new open-source language model developed by @01AI_Yi, has been officially released, boasting strong coding and mathematical capabilities, as well as excellent bilingual ability in Chinese and English. It is developer-friendly, capable of running on consumer GPUs, and requires an email for free commercial use under the Apache 2.0 license. The model, which surpasses the capabilities of the previous Mistral 7B, has been praised for bringing generalist capacities to a new level, excelling in conversation, coding, and math, and is anticipated to be further finetuned. Additionally, the release of the Yi model family, including the 6B and 34B pretrained language models extended to chat models, has been announced. The open-source initiative has been welcomed by the AI community, with Kai-Fu Lee's AI company @01AI_Yi and others highlighting the model's top performance in its category.