BusinessFriday, September 11, 2026· 2 min read

OpenAI Launches Agents API to Help Developers Build Cloud AI Agents

Source: OpenAI Blog

TL;DR

OpenAI has introduced the Agents API, a managed service for building and launching cloud-based AI agents. Powered by the Codex harness, it supports orchestration, long-running sessions, and tool use—making it easier for teams to create more capable AI-powered workflows.

Key Takeaways

  • 1OpenAI’s Agents API gives developers a managed way to build and deploy cloud AI agents.
  • 2The service is powered by the Codex harness, supporting orchestration and tool use.
  • 3Long-running sessions could enable more complex, multi-step automation tasks.
  • 4The launch may help businesses move from simple chatbots to more useful autonomous workflows.

OpenAI has introduced the Agents API, a managed service designed to help developers build and launch cloud-based AI agents more easily. The new API is powered by the Codex harness, bringing together orchestration, long-running sessions, and tool use in one platform.

Making AI agents easier to build

AI agents are systems that can work through multi-step tasks, use tools, and continue operating across longer sessions. By offering this as a managed service, OpenAI is lowering the technical barrier for teams that want to create practical AI assistants for coding, operations, customer support, research, and internal workflows.

Why it matters

  • Faster development: Teams can focus on building useful agent experiences instead of managing complex orchestration infrastructure.
  • More capable automation: Long-running sessions open the door to agents that can handle richer, multi-step tasks.
  • Business-ready workflows: Tool use and managed deployment can help organizations bring AI agents into real-world products and processes.

The Agents API is another step toward making AI systems more action-oriented and useful in everyday work. For developers and businesses, it signals a future where building reliable AI-powered assistants becomes more accessible and scalable.

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