OpenAI deprecates Agent Builder and Evals: migrate to Agents SDK by November 30
AnalysisA quiet product update on June 3 put a deadline on a lot of agent workflows. OpenAI notified developers that Agent Builder, its visual no-code canvas for composing agent logic, and its standalone Evals product will both go dark on November 30, 2026. The migration path is the Agents SDK for code-heavy workflows or ChatGPT Workspace Agents for natural-language ones. The shutdown follows the October 2025 launch of AgentKit as a unified platform and suggests the drag-and-drop builder never reached the critical mass needed to justify maintaining it alongside the SDK, which is where OpenAI has concentrated development resources since.