GPT-3.5 Turbo (Jun 2023) is a closed-weights model from OpenAI, released June 13, 2023. It has an ECI score of 113 and ranks 209th of 249 tracked models. At the time of its release, it ranked 3rd of 13 tracked models. At $1/Mtok for input tokens and $2/Mtok for output tokens, it is more expensive per token than similarly-capable models.