Penny-1.7B: A 19th-Century Irish Prose Style Language Model

Penny-1.7B is a 1.7 billion parameter causal language model fine-tuned with Group Relative Policy Optimization (GRPO) to mimic the 19th-century prose style of the 1840 Irish Penny Journal. A reward model distinguishes original journal text from modern translations, maximizing authenticity. Ideal for creative writing, educational content, or stylistic pastiche in Victorian-era Irish English, but not recommended for contemporary fact-checking.