I normally use Python’s LangChain framework to communicate with OpenAI API. For a change, I wanted to see if Go has any libraries to access OpenAI and other LLMs. Interestingly I found that LangChainGo is a port of LangChain for Golang!

I decided to implement a simple Completetion request in both streaming and non-streaming modes. Turned out to be pretty straightforward. I am not implementing any fancy GUI for this example. It just prints onto the console.

Here is the code that interacts with OpenAI in non-streaming (sync) mode:

The corresponding output is this (there is a small delay before the whole output is printed):

Here is the code that works in async (streaming) mode:

When you run this function, the output is printed in chunks as expected. The final output is shown below:

As you can see, the code abstraction is pretty clean and intuitive. The good news is that LangChainGo supports many other LLMs too. 

The source code can be downloaded here.