Walmart said Tuesday it was partnering with OpenAI to enable customers and Sam’s Club members to shop directly within ChatGPT, using the AI chatbot’s Instant Checkout feature.The world’s largest retailer is expanding its use of artificial intelligence as companies across sectors adopt the technology to simplify tasks and cut costs.Walmart has announced AI tools including generative AI-powered ‘Sparky,’ which is available on its app to assist customers with product suggestions or summarizing product reviews, ...