GPTChat for Slack is an AI tool powered by OpenAI that can be added to your Slack team to generate emails, articles, lists, and code, among other features. To use GPTChat, you need to register and provide your Slack and OpenAI API keys. The tool collects temporary conversation logs for up to 30 days to improve user experience and provide error-handling support, and API keys are stored securely for as long as you use GPTChat for Slack.