OpenAI CLI is an open-source command-line interface tool released by OpenAI, designed to provide developers with a more efficient and direct way to interact with the OpenAI REST API. This tool is developed in Go and features cross-platform capabilities. Its importance lies in simplifying complex API calls into standard terminal commands, greatly reducing the barrier for integration and testing. The product is positioned as a developer aid tool, stemming from the growing community demand for automation scripts and terminal integration. In terms of pricing, the tool itself is open source and free, but fees incurred by API calls must be paid according to OpenAI's pricing strategy.