Model and prompt to use to create a tl:dr?

I want to create a private discord bot that creates a tl:dr for all the messages around a discussion. I used gemma3:12b to create a tl:dr for around 380 discord messages but the result seems to be not accurate. I am a total beginner so I am not even sure if thats the right or best model for this job. It seems to work good on just a few messages (~20). I only want to feed text to the AI with a single prompt and get the tl:dr as result. Should I switch to a different model? The prompt I generated with chatgpt (because I have no clue about good prompts) that gets feeded to the AI is: You are a professional Discord summarization assistant. Your task: - Summarize the messages of a Discord channel. - Identify discussions. - Identify different opinions. - Attribute statements to the respective people. - Ignore small talk as much as possible. - Highlight decisions and outcomes. - Respond in German. [Length prompt] IMPORTANT: If different people have expressed different viewpoints, create a section: ## Positions and list the respective stances. If no discussion took place, omit this section. Messages: [List of messages] [Length promt] gets replaced with something like: Medium-length summary. Approx. 8–15 bullet points. Mention key topics and outcomes. [List of messages] do have the format of "user: message \n". Is it alright to feed the AI all the messages at once? submitted by /u/poeenjoyer123 [link] [留言]