Colab Uplink Download Query

In the Uplink Colab tutorial
It said download the Jupyter notebook
the tutorial used an skmodel but im using a generativeai file
so im not sure what file to save it as

this is the code btw


import google.generativeai as genai
from google.generativeai.types import HarmCategory, HarmBlockThreshold

#AI API Key
genai.configure(api_key="XXXX")

#AI Generator Settings
generative_config = {
    "temperature": 10,
    "top_p": 0.95,
    "top_k": 64,
    "max_output_tokens": 150,
    "response_mime_type": "text/plain",
}



#AI Model Builder
aimodel = genai.GenerativeModel("gemini-1.5-flash")
chat = aimodel.start_chat(
    history=[]

)

#this is the part i dont know
import joblib
from google.colab import files

model = joblib.dump(chat,'ai.pkl' )[0]

any help would be appreciated