AI Glossary

AI Termcirca 2016· Added May 26, 2026

Fine-Tuning (in Machine Learning)

Fine-tuning adjusts pre-trained models with new data for specific tasks or domains.

Fine-tuning is an optimization technique applied post-training to refine a machine learning model's performance on specific datasets or tasks. This process entails taking a pre-trained model—often trained on large datasets—and incrementally training it further using smaller task-specific datasets. By fine-tuning the model's parameters, practitioners can significantly improve performance without requiring extensive computational resources typically needed for training from scratch.

Examples

  • A sentiment analysis model fine-tuned with industry-specific jargon improves email tagging accuracy.
  • Fine-tuning a voice recognition system using diverse accents enhances its global applicability.

Common misconceptions

  • Some think fine-tuning requires as much data as initial training; it generally needs far less.
  • It's not limited to language models; visual models also benefit greatly from fine-tuning.

Related terms

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