open-world

Definition

A setting in which the label set or situation space is not fixed in advance: a deployed system will meet objects, categories, or tasks it never saw in training and has to recognise them as unknown rather than force them into a known class. This is the assumption behind open-world recognition and open-ended agents, and it is what closed-set evaluation quietly assumes away. Unrelated to the video-game sense of the phrase.

Explainers using this term

• Paper Walkthrough: WorldClaw — Agents That Build Walkable, Editable 3D Open Worlds from a Single SentenceWorldClaw: Agentic 3D Open-World Generation at Scale