What is your developer experience with using LLM SDKs?

I'm developing a tool to simplify the use of LLM SDKs from various providers, like OpenAI, Anthropic, Cohere, Mistral, and others. Could you share your experiences of using them? I'm trying to make something similar to https://dashboard.cohere.com/playground/request-builder, supporting various LLM providers. Additionally, parameters and prompts can be easily configured right in the web UI. Here is the PoC I made so far: https://github.com/brianbscho/gpinterface https://gpinterface.com If you could share your experiences on using LLM SDKs, it would be incredibly valuable and helpful! Thank you!