Download OpenAI_Anthropic.zip Introduction This Excel Macro enabled file provides the smallest possible example of how to use Chat GPT and Anthropic Claude in your Excel Macro. Background This is a sequel to my earlier article, Chat GPT in VB.NET and C#. Using the code Get Anthropic API key https://console.anthropic.com/settings/keys Paste the Key to cell B1 Get OpenAI API key https://platform.openai.com/settings/profile?tab=api-keys Paste the Key to cell B8 Here is the code.