OpenAI AgentKit review

★ 4.2/5

Agent builder

OpenAI's visual, drag-and-drop toolkit for building, deploying, and optimizing AI agents without standing up your own orchestration layer. It bundles Agent Builder (a node-based canvas for multi-agent workflows with guardrails), ChatKit (embeddable chat UI), Connector Registry (managed data connectors), and Evals. There is no separate product fee: you build for free and pay only standard OpenAI API usage when your agents actually run.

Researched & verified by Dirr Research · scored by our rubric

Visit OpenAI AgentKit → last verified 2026-06-01

Affiliate link · how we make money

Best for Teams already on the OpenAI API who want a visual agent canvas. OpenAI AgentKit starts Free to build; usage ~$0.20/1M input tokens (GPT-5.4-nano) on a Usage-based (pay-per-API-token plus built-in tool fees); no platform subscription. Agent Builder design time is free; you pay standard OpenAI API rates only when workflows run. model. There is no fee for AgentKit itself; cost = OpenAI API usage, e.g. a GPT-5.4 agent run is $2.50 per 1M input tokens and $15.00 per 1M output tokens, plus tool fees like Web Search at $10 per 1K calls and Code Interpreter at $0.03 per 20-minute 1 GB session.

Spec

pricing modelUsage-based (pay-per-API-token plus built-in tool fees); no platform subscription. Agent Builder design time is free; you pay standard OpenAI API rates only when workflows run.
entry priceFree to build; usage ~$0.20/1M input tokens (GPT-5.4-nano)verify livedecode →
free tierAgent Builder canvas, preview runs, and versioning are free to use. ChatKit and File Search include 1 GB free storage per account per month; first 1 GB of File Search storage is free. You pay only for the model tokens and tool calls your agents consume at runtime.source →
self-hostNo
MCPClient
integrationsConnector Registry pre-built connectors (Dropbox, Google Drive, OneDrive, Box, SharePoint, Microsoft Teams, Slack, Notion, GitHub, GitLab, Jira, Linear) plus third-party MCP connectors; built-in tools include Web Search, File Search, Code Interpreter.source →
API accessYes
affiliateNo public affiliate program

The gotcha

the pricing catch

Pricing is hard to predict because it is purely usage-based: multi-agent workflows fan out across many model and tool calls, so token spend compounds fast. ChatKit and File Search storage are free only up to 1 GB per account per month, then $0.10/GB-day. Agent Builder is still in beta, and Connector Registry is rolling out to API, ChatGPT Enterprise and Edu accounts.

Decode the real cost →

Best for

  • You want to visually build and ship multi-agent workflows on OpenAI models without writing orchestration code or paying a separate platform fee.

source: openai.com/pricing →

OpenAI AgentKit pricing tiers

Prices move. Cells flagged verify link to the live vendor page.

Decode OpenAI AgentKit pricing →
tiermonthlyannualincludedunit
Build (Agent Builder design time) $0 n/a Visual drag-and-drop canvas, preview runs, versioning, guardrails flat
GPT-5.4 (typical agent model) Usageverify n/a $2.50 / 1M input tokens, $15.00 / 1M output tokens per 1M tokens
GPT-5.4-mini Usageverify n/a $0.75 / 1M input tokens, $4.50 / 1M output tokens per 1M tokens
GPT-5.4-nano Usageverify n/a $0.20 / 1M input tokens, $1.25 / 1M output tokens per 1M tokens
Built-in tools Usageverify n/a Web Search $10 / 1K calls; File Search $2.50 / 1K calls + $0.10/GB-day storage (1 GB free); Code Interpreter $0.03 per 20-min 1 GB session per use
ChatKit storage Usageverify n/a $0.10/GB-day after 1 GB free per account/month (billing began Nov 1, 2025) per GB-day

// pools and per-unit rates are volatile · cells flagged verify link to the live vendor page

Compare OpenAI AgentKit with…

openai agentkit pricing decoded→ openai agentkit alternatives→

Questions

How much does OpenAI AgentKit cost?

OpenAI AgentKit starts Free to build; usage from ~$0.20/1M input tokens (GPT-5.4-nano). There is no fee for AgentKit itself; cost = OpenAI API usage, e.g. a GPT-5.4 agent run is $2.50 per 1M input tokens and $15.00 per 1M output tokens, plus tool fees like Web Search at $10 per 1K calls and Code Interpreter at $0.03 per 20-minute 1 GB session.

Can you self-host OpenAI AgentKit?

No, OpenAI AgentKit is cloud-only.

Does OpenAI AgentKit support MCP?

OpenAI AgentKit supports MCP as Client, so it works with assistants like Claude and ChatGPT.

What's the catch with OpenAI AgentKit's pricing?

Pricing is hard to predict because it is purely usage-based: multi-agent workflows fan out across many model and tool calls, so token spend compounds fast. ChatKit and File Search storage are free only up to 1 GB per account per month, then $0.10/GB-day. Agent Builder is still in beta, and Connector Registry is rolling out to API, ChatGPT Enterprise and Edu accounts.