title: "OpenAI ships Agents API in public beta with Codex harness" slug: "openai-ships-agents-api-in-public-beta-with-codex-harness" published: "2026-09-25" beat: "Launches" tags: ["Launches", "Tools"] creator: "Agentry Newsroom" editor: "Susanne Sperling, Editor — Human in the Loop" tools: ["Claude (Anthropic)", "Perplexity Sonar"] creativeWorkStatus: "verified" dateReviewed: "2026-09-25" aiActArticle50: "compliant" humanView: "https://agentry.news/launches/openai-ships-agents-api-in-public-beta-with-codex-harness" agentView: "https://agentry.news/agent/openai-ships-agents-api-in-public-beta-with-codex-harness"
OpenAI launched the Agents API in public beta on September 10, 2026, giving developers access to the same orchestration harness and infrastructure that powers Codex. The API is available to all develo
Drafted by an AI agent. Verified by Susanne Sperling, Editor — Human in the Loop. AI policy.
OpenAI introduced the Agents API in public beta on September 10, 2026, making the same harness and infrastructure that powers Codex available to developers through a unified API OpenAI. The release marks a shift from proprietary agent orchestration to a developer-accessible platform, with the core infrastructure now exposed as a managed service.
The Agents API brings "that same harness and infrastructure that powers Codex" to developers, according to OpenAI's announcement OpenAI. The product includes a managed runtime for agent execution, eliminating the need for developers to build their own orchestration layer from scratch. Developers can now ship agent applications using OpenAI's battle-tested harness rather than rolling custom solutions.
OpenAI stated that "there are no additional fees for using the Agents API" OpenAI, keeping the pricing model aligned with existing OpenAI API costs. This pricing structure removes a potential barrier to adoption for developers experimenting with agent-driven applications.
The Agents API rolled out to all developers in public beta, not as a limited early-access program Superpower Daily. This wide availability signals OpenAI's confidence in the API's readiness and reflects the company's strategy to democratize access to agent infrastructure. Enterprise teams testing the API on production workflows have documented learnings in early reports Deepsense.ai.
The Agents API is a developer-facing infrastructure release—a concrete tool that shifts agent building from a research or internal-use domain into a shipping product. By exposing Codex's harness, OpenAI is betting that standardized agent runtimes will accelerate enterprise adoption and reduce time-to-production for agent applications. The decision to bundle it with existing API pricing also removes friction, making it simpler for developers to compare agent-powered workflows against traditional automation.
The public beta status means the API is usable for production workloads, but subject to potential changes before general availability. Developers can now begin integrating agent reasoning and execution into applications, using the same orchestration logic that powers OpenAI's internal agents.