OpenAI introduces Agent Plugins, an open standard for reusable agent extensions

OpenAI released Agent Plugins, an open standard letting reusable AI-agent extensions work across compatible products rather than being locked to one vendor's runtime. The timing is pointed: GPT-5 turned one this week, and OpenAI is marking it by shifting attention from individual models to the interoperability layer around them. A cross-product plugin format is a bid to make OpenAI's agent tooling the default surface that third-party developers build against.

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