Developer ToolsAug 12, 2026
OpenAI deprecates Assistants API, shifts to client-stateful
OpenAI is deprecating the Assistants API, shifting to a client-stateful conversational model, which requires teams to build custom state management logic. This change impacts complex agent workflows and signals a fundamental shift in architecture.
Why now
This deprecation is significant as it marks a strategic shift in OpenAI's API design, forcing teams to adapt their workflows and potentially impacting existing integrations.
Key signals
OpenAI is deprecating the Assistants API, moving to a client-stateful conversational model.
The shift to client-stateful responses requires teams to build their own state management, making the migration more complex.