Add a spec to test the client with GPT-4

[rmontgomery429]

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This adds a spec to test the client using gpt-4 as it was mentioned that @alexrudall does not have access to gpt-4 yet in #251. The problem was not manifested but it's still nice to have this spec for sake of completeness.

[alexrudall]

Thanks for your work on this! Couple of things with this

• I like the shared examples and it's nice to test the separate models, as sometimes OpenAI remove them without much warning and good to catch that so we can update the README
• Would be great to reproduce the Helicone issue but that's a separate thing maybe and also might be hard as the responses from the AI is not idempotent so we need to somehow check it's speaking correct English without missing any words? lol. I thought I read somewhere the chunks returned an index but all these have index: 0. Maybe they're coming through as one chunk and if they came separately like they seem to in production we'd be able to see the issue?
• I need anyone who has an API key to be able to run the full specs (with the non-VCR option) and them pass, because it feels more inclusive and will also annoy me if that spec always fails for me until I get through the waitlist. unfortunately that means leaving GPT-4 out for now.

Anyway if you remove the GPT-4 spec (for now) I'll merge. BTW, you're the first contributor I've seen who's understood how I've written the tests and how to add to them (and actually improve them) and I really appreciate that.

[rmontgomery429]

@alexrudall I'm happy to help. Regarding GPT-4, I agree with being more inclusive, but I also think like it's important to be able to prove that the gem works with as much of the OpenAI API as possible. Would you consider a switch to opt-in to testing with GPT-4? It could be something simple like setting an environment variable GPT4=true?

[rmontgomery429]

@alexrudall Check out the latest changes and let me know what you think. I've added a note to the readme as well.

[rmontgomery429]

This has gone stale.