### Check for existing issues

- [x] I have searched the existing issues and checked that my issue is not a duplicate.

### The Feature

I would like to have OpenCode Go as a provider. Some things to note from the OpenCode client's implementation of the OpenCode Go provider:

- It loads cost information from https://models.dev/api.json. - It uses an openai style endpoint by default, but some models use anthropic style endpoints. This is indicated in the models.dev endpoint when a model has provider.npm = "@ai-sdk/anthropic".

### Motivation, pitch

Adding a custom provider would allow:

- available models to be loaded automatically - token usage costs to be calculated - The correct provider to be listed in Usage

### What part of LiteLLM is this about?

Proxy

### LiteLLM is hiring a founding backend engineer, are you interested in joining us and shipping to all our users?

No