Can I delete my data from an AI model after it was used for training?
Quick Answer
No. Once data is incorporated into model parameters during training, removing it is technically near-impossible. There is no undo button. Machine unlearning techniques are still experimental.
Detailed Answer
Once your data has been incorporated into a model's parameters during training, removing it is technically near-impossible. Unlike a database where you can delete a row, LLMs encode information as distributed patterns across billions of parameters.
Research from the University of Tubingen (June 2025) confirmed that machine unlearning techniques are still experimental and cannot be retrofitted into existing models.
The only reliable way to remove data is to retrain the model from scratch — which costs millions of dollars.
This creates a fundamental conflict with GDPR's right to erasure (Article 17).
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