OpenAI announced a major upgrade to its Agents SDK, introducing sandboxing capabilities and an in-distribution harness for frontier models. The new features let businesses run AI agents in isolated environments and test them with advanced models while keeping systems secure. Initially available in Python, with TypeScript support slated for later, the tools aim to help enterprises build longer‑horizon, multi‑step agents without risking unintended actions. OpenAI says the enhancements will be offered through its standard API pricing. Read more →