Chatgpt has limited alternatives as of now, I think Google bart is something similar but only Available in US and UK
Llama is nowhere close to chatGPT but good enough for some users. Stable diffusion 2.1 is better than Dalle2. There is an experimental version of dalle only accessible to a few selected people that seem better than stable diffusion 2.1 though. MidJourney is a bit better but not Open-source and you will not be able to generate some kind of pictures. Which could be a good thing perhaps.