OpenAI launched a shopping tool, Instant Checkout, on Monday that lets people purchase items without leaving its chat platform. The feature started with items from American Etsy sellers and works for ChatGPT Plus, Pro, and Free users in the United States. The company said over one million Shopify sellers will join the platform soon, including brands like Skims and Glossier. Stock prices for both Etsy and Shopify jumped roughly 5% following the announcement on Monday.