What is the best LLM to help me with my creative writing?

I've been out of the game for a while. I'm looking to use an LLM for creative writing specifically but general advice is appreciated too.

1) Are there any LLMs that are open source and can be run from google colab? Any that have comparable results to the big box names I mean. This would be my preference.

2) If not, what are the best LLMs to use with an API that I can call from a script. Something low cost (or free) without annoying limits. If someone can give give me a short list and I try them out myself, that would help.

Thank you.