As a professionally trained indexer and member of the American Society for Indexing, I share the following:

Statement on the Role of AI in Indexing (as at July 1, 2025)

The current assessment is that using large language model AIs (LLMs) such as ChatGPT to generate indexes does not produce results that come anywhere near meeting standards for excellence in Indexing. Future developments in AI may bring improvements, but at present the human brain of a professional indexer is still the best tool for analyzing, writing, and editing an index in full awareness of context as per quality standards.