Best enterprise agent platforms › OpenAI Frontier review

OpenAI Frontier, AgentKit and workspace agents review: the best enterprise agent platform for building on OpenAI?

Answer in brief: OpenAI ranks #10 on our shortlist. It is the best-for pick for companies that want to build directly on OpenAI models. OpenAI offers three things. Frontier is an enterprise platform for deploying and governing AI coworkers. AgentKit is developer tooling, including the Agents SDK and ChatKit. Workspace agents are shareable agents inside ChatGPT Business and Enterprise. Know the trade-offs: Frontier launched with limited availability and has no public price, and the visual Agent Builder shuts down on November 30, 2026.

Top pick for OpenAI-first teams. Go straight to the source for OpenAI's newest models, with enterprise identities and governance. Visit OpenAI Frontier →

This is independent research from OpenAI's own announcements, docs and pricing, and from ISG's public summary. We have not tested the product hands-on.

Three ways to put OpenAI agents to work

Frontier (announced February 5, 2026): shared business context and agent execution across local, enterprise-cloud and OpenAI-hosted environments, with memory, performance improvement, individual agent identities, permissions, guardrails and enterprise governance.
AgentKit: a developer toolkit built on the Responses API and the Agents SDK. ChatKit lets you embed agent chat experiences in your product.
ChatGPT workspace agents: reusable agents for repeatable team workflows. They can be configured with models, apps, custom MCPs, skills, files and tools, shared through an organization directory, connected to Slack, scheduled, or triggered through an API. Admins control enablement and role-based access.

Who it fits best

Companies standardizing on OpenAI models.
ChatGPT Business and Enterprise customers that want shared agents for employees.
Product teams embedding agent chat in their own apps.

Why buyers shortlist it

First access to OpenAI's models and tools.
Flexible execution. Frontier agents can run locally, in an enterprise cloud or hosted by OpenAI.
Employee reach. Workspace agents meet staff inside ChatGPT and Slack.

Honest drawbacks

Frontier availability. It launched to a limited set of customers, and OpenAI hasn't published a definitive eligibility schedule or price.
Product churn. OpenAI says the API-platform Agent Builder and Evals will no longer be available from November 30, 2026. It recommends the Agents SDK or workspace agents instead. ChatKit stays.
Analyst view. ISG's 2026 AI Agents Buyers Guide placed OpenAI in its Merit tier, not among its Leaders.

Pricing model

Frontier and ChatGPT Enterprise: through sales.
AgentKit and API: standard model and tool pricing.
ChatKit storage: $0.10 per GB-day after 1 GB free per account per month.

Best alternatives

Microsoft Foundry Agent Service: hosted agents that support the OpenAI Agents SDK, with Entra identities.
Amazon Bedrock AgentCore: framework-agnostic production infrastructure on AWS.
Google Gemini Enterprise: search-grounded employee agents plus a developer platform.

OpenAI agents FAQ

When does OpenAI Agent Builder shut down?

November 30, 2026. OpenAI recommends the Agents SDK for code-based workflows and ChatGPT workspace agents for natural-language use cases.

What is OpenAI Frontier?

An enterprise platform for building, deploying, managing and governing AI coworkers across company systems. It launched with initially limited availability.

How much does ChatKit storage cost?

$0.10 per GB-day after 1 GB free per account per month.

Sources

Visit OpenAI Frontier →

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Last updated: 2026-11-09.