[Newbie here] I finetuned a llama 3.1-3b-It model with my whatsapp chats and the output was unexpected -

Reddit r/LocalLLaMA / 3/18/2026

💬 OpinionTools & Practical UsageModels & Research

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Key Points

A Reddit post describes finetuning a llama 3.1-3b-it model on WhatsApp chats and encountering unexpected behavior.
The model roughly imitates the user's texting style but also fabricates unrelated references to past events.
An example shows the model replying with a prompt about a math test, indicating it mixes style with unrelated content.
The author is seeking help from the community to troubleshoot the fine-tuning results.

I basically expected the model to reply to messages my my style of texting. Well it does have my style of texting while replying, It also references random events from the past without any reason.

Ex-

Me: yooo buddy

llm: Bro can you tell me when the math test is? Pretty scared 💀💀💀💀

why couldn't it say "hi" in my style?

Please help this newbie😭

submitted by /u/MG_road_nap
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