···5050 * a pretrained model for detecting lewd images
5151* [Sentinel by Roblox](https://github.com/Roblox/Sentinel/tree/main)
5252 * a Python library designed specifically for realtime detection of extremely rare classes of text by using contrastive learning principles
5353+* [gpt-oss-safeguard by OpenAI](https://github.com/openai/gpt-oss-safeguard)
5454+ * open-weight reasoning model to classify text content based on provided safety policies
53555456## AI-powered Guardrails
5557* [Llama Guard by Meta](https://github.com/meta-llama/PurpleLlama/tree/main/Llama-Guard3)