Yi 6B is an open-weights model from 01.AI, released November 22, 2023. It has an ECI score of 104 and ranks 226th of 249 tracked models. At the time of its release, it ranked 19th of 36 tracked models. At $0.18/Mtok for input tokens and $0.18/Mtok for output tokens, it is more expensive per token than similarly-capable models.