Researchers release Mr.Chatterbox-2.7B-Chat model trained on 19th-century British texts
It is a fine-tuned version of Mr.Chatterbox-2.7B, a language model trained exclusively on British texts from 1800 to 1899. The model simulates a Victorian gentleman’s speech patterns and reasoning, using 97.2% real 19th-century dialogue in its fine-tuning data. It avoids modern prompts to mimic the period’s views, though offensive attitudes may still appear due to unfiltered source material.
Key points
- Model trained on 97.2% real 19th-century British texts, with 2.7B parameters
- Scores 0.751 on behavioural evaluation (up 0.096 from base model)
- Released under CC BY-NC-SA 4.0 with data-use restrictions from sources
The model’s replies are scored on behavioural fit and register, with a 0.751 score on a 1,356-prompt evaluation (up from 0.655 for the base model). It includes 20 predefined act tokens (e.g., giveopinion, answerfact) to steer responses. Weights are released under CC BY-NC-SA 4.0, with training data restrictions from sources like Institutional Books. The project is now used in a class at Emory University.
Mr.Chatterbox-2.7B-Chat: A model trained from scratch on Victorian texts
huggingface.co · 14 October 2026
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