# Privacy Filter is an open-source model designed to detect and redact personally identifiable information (PII) before it ever reaches a cloud-based server.

*genai · news · 2026-04-22 · VentureBeat*

## Key points

- OpenAI has open-sourced Privacy Filter, a bidirectional PII redaction model, under the Apache 2.0 license.
- Privacy Filter uses a Sparse Mixture-of-Experts architecture: only 50M of its 1.5B parameters are active per pass.
- It features a 128,000-token context window, enabling entire documents to be processed without splitting.
- The tool runs on standard laptops or in browsers via transformers.js and supports on-device data sanitization.
- OpenAI warns Privacy Filter is a redaction aid, not a safety guarantee, especially for high-risk deployments.

**Companies:** OpenAI, Hugging Face, Prime Intellect

[Read the full story on VentureBeat](https://venturebeat.com/data/openai-launches-privacy-filter-an-open-source-on-device-data-sanitization-model-that-removes-personal-information-from-enterprise-datasets)

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