In TOGAF, what is the difference between an artifact and a deliverable?

This statement is incorrect; typically, a deliverable contains one or more artifacts, not the other way around.

Artifacts and deliverables are distinct concepts in TOGAF, serving different purposes in architectural development.

While architects define artifacts and contribute to deliverables, and project managers manage the delivery, the primary distinction is their contractual nature and aggregation, not solely who prepares them.

Neither artifacts nor deliverables are inherently unique or reusable in the exclusive manner described; both can be tailored and reused, but their primary distinction lies in their formal status as contractual outputs.

In TOGAF, a deliverable is a tangible output that is contractually specified to be produced by a project, formally reviewed, approved, and baselined by stakeholders. Artifacts, on the other hand, are more granular architectural work products that describe an aspect of the architecture and are typically contained within deliverables but are not necessarily contractual outputs themselves.