You seriously need to work on getting your terminology straight. What that guy made was an MCP Server not a LLM. The LLM he's using wasn't trained to do this specifically, and he isn't really open sourcing anything new other than a wrapper around existing LLMs. The LLMs are what execute the function calling under the hood; he did nothing more than just give them access to existing tools. Am getting so tired of all this over hyping nonsense and constant misinformation being spread. Do better please. If you don't understand something you should ask AI to explain it for you, but don't make it out to be something it's not.