Can LLM use other LLM as a tool?

[sunsetsobserver]

Hello,

Can LLMs be tools for other LLM agents?

For instance a GPT-2 model from HuggingFace would be a tool that OpenAI GPT-4 can use if user asks specifically to ask something to GPT2?

I tried to set this up (see picture attached) but after asking any question in a chat window I am getting:
"Error: Saving not supported for this chain type."

I added a placeholder python tool for GPT2 agent as Langflow stated adding tool is required.

I would appreciate any help! Thank you!

[DoubleLazyZ]

@sunsetsobserver I would also like to ask if there are any success stories that anyone can share?