April 2026
Intermediate
395 pages
13h 22m
English
Content preview from Generative AI with Python
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3.2 Simple Use of LLMs via Python
We’ll start and learn how to use the most popular LLM: OpenAI’s GPT. This immensely powerful model for which you need to pay. Since there are also extremely capable LLMs provided as open-source, we’ll show you how you can use LLMs for free via Groq. You’ll see that the way to interact with the models is very streamlined, thanks to the Python framework LangChain. After these two examples you’ll be able to connect to any other LLM provider.
3.2.1 Coding: Using OpenAI
To use OpenAI you need to have an application programming interface (API) key. These models are not free, so you’ll be charged for your usage. Prices are dropping permanently over time, and you can check the current pricing via https://openai.com/api/pricing/ ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.