Version 2.4.3 of GPT4All is out and has many new features, including 16 full models to download or to use (you can access OpenAI ChatGPT cloud based models with the API License keys. I will show how to obtain and input the license keys soon, but of course this will share your prompts and outputs with OpenAI and I would only use this aspect for testing. With this upgrade you now have a single central Prompt interface to the best LLM AI Models available.
I will write about the setting under the Gear Icon in the app soon also. But until then try experimenting with Temperature, Top P and penalty. They are interesting as they are increased.