Text completions generate a continuation of a single prompt string, making them ideal for tasks like autocomplete, code completion, or single-turn text generation. This is contrast to chat completions, which are meant for multi-turn conversations, where the input is a list of messages with roles (like “user” and “assistant”), allowing the model to maintain context and produce more coherent, context-aware responses across multiple exchanges. Use text completions for simple, stateless tasks, and chat completions for interactive, context-dependent scenarios.