A Canada-based engineer shared a video of 'Tom Riddle's diary', which he created using the world's most powerful AI model, Anthropic's Fable 5. The video showed prompts written on the reMarkable paper tablet disappearing before Fable 5's responses appeared, with the engineer calling it "magical". 'Tom Riddle's diary' features in 'Harry Potter and the Chamber of Secrets' as a Horcrux.