From model to agent: Equipping the Responses API with a computer environment

OpenAI said on March 11, 2026 that Responses API now works with a shell tool and hosted container workspace, so models can execute commands in an isolated loop. The post says GPT-5.2 and later are trained to propose shell commands, while the API streams outputs and can run multiple commands concurrently across sessions; the container includes a filesystem, optional SQLite, and restricted network access. The key change is orchestration, not the “agent” label; pricing, quotas, and full security details are not disclosed in the visible post.

Why it matters: Substantive OpenAI developer update: the Responses API moves from tool calls to a managed computer environment with shell execution, streaming, parallel runs, and context compaction, so HKR-H/K/R all pass. The post is truncated and omits pricing, quotas, and full safety details,【