Right. And then there's using an MCP tool that instantiates another agent except uses a different model.
Here's a good example. For summarization of a page of content. Content is maybe pulled down by an agentic crawler, so using a local model to summarize is great. It's fast, doesn't cost anything (or much) and I can run it without guardrails as it doesn't represent a cost risk if it ran out of control.
Like I had Codex + gpt-5-codex (20€ tier) build me a network connectivity monitor for my very specific use case.
It worked, but had some really weird choices. Gave it to Claude Code (20€ tier again) and it immediately found a few issues and simplifications.