OpenAI Assistants

The Assistants API lets developers build powerful, purpose-built AI agents with persistent threads and integrated tools.

The OpenAI Assistants API simplifies building sophisticated AI applications (agents) within your own software. It manages complex state: Assistants are defined by instructions, a model (e.g., GPT-4o), and a set of tools (Code Interpreter, File Search, Function Calling). Conversations are managed via persistent Threads, eliminating the need for manual history management. The API handles multi-step reasoning and tool-use orchestration, allowing developers to focus on application logic, not agentic boilerplate.

https://platform.openai.com/docs/assistants/overview