Anthropic has integrated retrieval-augmented generation (RAG) into its Claude models with the introduction of a new Citations API. This feature aims to enhance the reliability of AI systems by allowing them to provide verifiable information rather than unsubstantiated claims. The Citations API is expected to significantly reduce errors and avoid hallucinations in AI responses. Additionally, Anthropic and DeepLearning AI have released a brief course covering the features of the API, designed to help users understand how to build systems using these advanced capabilities.