I think Anthropic's definition makes the most sense.
- Workflows are systems where LLMs and tools are orchestrated through predefined code paths. (imo this is what most people are referring to as "agents")
- Agents, on the other hand, are systems where LLMs dynamically direct their own processes and tool usage, maintaining control over how they accomplish tasks.
https://www.anthropic.com/engineering/building-effective-age...