OpenAI Enhances Agents SDK with Sandboxing and Harness Features for Safer Enterprise AI

Thu, 16 Apr 2026 00:03:00 +0200

OpenAI has announced an update to its Agents software development toolkit (SDK), aimed at helping enterprises build safer and more capable AI agents. The updated SDK introduces sandboxing, which allows agents to operate in controlled environments to minimize risk from unpredictable AI behavior. This ensures that agents can access only specific files and perform designated tasks, maintaining the integrity of the overall system. Additionally, OpenAI has added an in-distribution harness for frontier models, enabling developers to deploy and test agents with advanced, general-purpose models while using approved tools within a workspace. The initial rollout includes support for Python, with TypeScript coming in a later release. Future updates will expand capabilities such as code mode and subagents. OpenAI intends to make these new tools available to all customers through its API at standard pricing. The goal is to empower enterprises to create 'long-horizon' agents capable of handling comp