Case study · UNTOLD
80%
faster newsletter creation
UNTOLD: fine-tuned GPT-4.1 models cut newsletter creation time by 80%
In 2025, Grapefruit built two custom GPT-4.1 models for UNTOLD, Romania's largest live events organizer, fine-tuned on its newsletter archive in Romanian and English. The AI MVP shipped in one week and cut newsletter creation time by 80%, while a segmented campaign strategy across five ad platforms reached hundreds of thousands of fans.
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