Updated README with Free API code snippet

README.md

@@ -39,9 +39,30 @@ Hopefully I've done a decent job of making these guides bulletproof - but please
 
 During the course, I'll suggest you try out the leading models at the forefront of progress, known as the Frontier models. I'll also suggest you run open-source models using Google Colab. These services have some charges, but I'll keep cost minimal - like, a few cents at a time. And I'll provide alternatives if you'd prefer not to use them.
 
-Please do monitor your API usage to ensure you're comfortable with spend; I've included links below. There's no need to spend anything more than a couple of dollars for the entire course. Some AI providers such as OpenAI require a minimum credit like \$5 or local equivalent; we should only spend a fraction of it, and you'll have plenty of opportunity to put it to good use in your own projects. During Week 7 you have an option to spend a bit more if you're enjoying the process - I spend about $10 myself and the results make me very happy indeed! But it's not necessary in the least; the important part is that you focus on learning.
+Please do monitor your API usage to ensure you're comfortable with spend; I've included links below. There's no need to spend anything more than a couple of dollars for the entire course. Some AI providers such as OpenAI require a minimum credit like \$5 or local equivalent; we should only spend a fraction of it, and you'll have plenty of opportunity to put it to good use in your own projects. During Week 7 you have an option to spend a bit more if you're enjoying the process - I spend about \$10 myself and the results make me very happy indeed! But it's not necessary in the least; the important part is that you focus on learning.
 
-I'll also show you an alternative if you'd rather not spend anything on APIs.
+### Free alternative to Paid APIs
+
+Early in the course, I show you an alternative if you'd rather not spend anything on APIs:  
+Any time that we have code like:  
+`openai = OpenAI()`  
+You can use this as a direct replacement:  
+`openai = OpenAI(base_url='http://localhost:11434/v1', api_key='ollama')`
+
+Below is a full example:
+
+```
+from openai import OpenAI
+MODEL = "llama3.2"
+openai = OpenAI(base_url='http://localhost:11434/v1';, api_key='ollama')
+
+response = openai.chat.completions.create(
+ model=MODEL,
+ messages=[{"role": "user", "content": "What is 2 + 2?"}]
+)
+
+print(response.choices[0].message.content)
+```
 
 ### How this Repo is organized