Agent harnesses
OpenAI AgentKit
Toolkit for designing, deploying, and evaluating agents: Agent Builder, ChatKit, Connector Registry, Evals
Commercial
What it is
Our note
Agent Builder wires long-lived context via Connector Registry (Dropbox, Google Drive, SharePoint, Microsoft Teams, MCP servers) and Guardrails for PII masking and jailbreak detection; per OpenAI's own update, Agent Builder and Evals are being wound down from November 30, 2026, with the Agents SDK as the migration path for code-based agents.
At a glance
- Vendor
- OpenAI
- Business model
- Commercial
- Pricing
- Included with standard OpenAI API model pricing (Agent Builder and Evals sunset 2026-11-30; recommended path is the Agents SDK or Workspace Agents in ChatGPT) pricing page ↗
- Self-hosting
- No, hosted only
- Access
- web app/API
Links and sources
- Official siteopenai.com/index/introducing-agentkit
- Pricingopenai.com/index/introducing-agentkit
Facts verified nov 10, 2026; added nov 10, 2026. Vendor facts come from the vendor’s own pages; benchmark claims are self-reported unless we say otherwise.