I came across this new finetuned model based on Openchat 3.5 which is apparently trained used Reinforcement Learning from AI Feedback (RLAIF).
https://huggingface.co/berkeley-nest/Starling-LM-7B-alpha
Check out this tweet: https://twitter.com/bindureddy/status/1729253715549602071
They tested to MT Bench with GPT-4 as judge