LangChain examples with other LLMs?

I’d like to develop my own project with LangChain.
But testing everything in the pipeline with GPT is too expensive.
Are there examples to use LangChain with other LLMs that I can follow to at least test my pipeline before choosing the best LLM?
Thanks.

https://python.langchain.com/en/latest/modules/models/llms/integrations.html

The examples here are all “how-to” guides for how to integrate with various LLM providers.

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Update:
There seems to be some modification in the documentation. The original link would give Page Not Found now. But one can still find them in the parent directory “LLMs”. For example, the content for llamacpp is here: Llama-cpp | 🦜️🔗 Langchain