Walmart uses generative AI to write and improve product descriptions and data for items sold on its website. The company used AI models to create or improve over 850 million pieces of product information — work that Walmart's CEO said would have required nearly 100 times as many employees to complete manually in the same time. Walmart also gives third-party sellers tools to generate their own listings using AI.

The 850-million-item figure was disclosed by CEO Doug McMillon on the August 2024 earnings call. The system uses a two-step approach: one large language model extracts product attributes from existing descriptions and images, and a second large language model — fine-tuned on human-verified data — checks the accuracy of the first model's output. For third-party marketplace sellers, Walmart launched AI-powered listing tools at its August 2025 Marketplace Seller Summit, including single and bulk item setup tools and a "Smart Assistant." Sellers can use a generative AI tool in the Seller Center Success Hub to receive suggestions for product names, descriptions, and key features, all calibrated to Walmart's content standards.