You put the "agent" word into apostrophes as if I use it as a marketing buzzword. No. An agent is an LLM in a loop with memory usage, with file system access, etc, which is usually more effective than just using an LLM as is, especially if you orchestrate these agents and subagents in a good way. In my opinion using the word 'ChatGPT' (a specific user-facing LLM brand) in these discussions is much more buzzwordy than using the word agent.