Complete can be made to behave similar to Chat, but requires formatting the prompts manually. Here's an example of Chat and Complete commands that will produce the same results:
Shell
$ together chat Loading togethercomputer/RedPajama-INCITE-7B-Chat
Type /quit to quit, /help, or /? to list commands.
>>> List the best restaurants in SF
Shell
$ together complete "<human>: List the best restaurants in SF\n<bot>: "
The key difference is that Chat is a purely interactive experience with features like chat history, while Complete offers a more customizable and manual experience useful for implementations in custom use-cases.