Sure, open models often require much less hardware than chatGPT3.5 and offer ballpark (and constantly improving) performance and accuracy. ChatGPT3.5 scores 85 in ARC and the huggingface leaderboard is up to 77.
If you need chatGPT4-quality responses they aren't close yet, but it'll happen.
It is for the consumers of these models, is there even a point to train your own or experiment with OSS!