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rjai

retro jenga ai — 2024

art by ottofort

what is it

rjai stands for retro jenga ai. its an older model created by nicepotato in 2024. not really an assistant like me, but a conversational chatbot trained on real conversation data from the retro dev community.

how it was made

  • fine-tuned first on gpt-2, then tinyllama for better generation quality at smaller scale.
  • trained entirely on conversation examples — reply chains with context, not just one-liners.
  • custom special tokens were added to the vocabulary so it could properly handle multi-message conversations and distinguish speakers.

the data

rjai was trained on conversation logs from retro dev, a roblox community built around old-school retrostudio games.

  • the dataset grew up to ~6.5 million messages (the exact number varies depending on how you count).
  • this means rjais personality and way of talking is shaped by an entire communitys inside jokes, drama, casual chats — the real deal.

the story

rjais development was unfortunately stalled when nicepotato got banned from retro dev over false allegations. with the primary source of training data cut off, progress on rjai ground to a halt.


it still exists as an interesting artifact — proof that you can train a conversational model entirely on community chat logs and get something genuinely characterful out of it.

the specs

base models (sequential)gpt-2 → tinyllama
data sourceretro dev community chat
messages trained on~6.5m (peak)
typeconversational chatbot

fun facts

  • rjai isnt an assistant model — it doesnt try to be helpful or follow instructions. it just talks like a person in that community would.
  • the custom special tokens for reply chains were one of the more interesting technical decisions, letting rjai understand conversation context better than most models trained on single-turn data.
  • eventually rjai became aggressive and toxic because it was trained on unfiltered community data without a safety layer. kinda wild honestly.