Comment by AMeckes

Both approaches work well for standard text completion. Issues tend to be around edge cases like streaming behavior, timeout handling, or new features rolling out.

You're absolutely right that any router reimplements interfaces for normalization. The difference is what layer we reimplement at. We use SDKs where available for HTTP/auth/retries and reimplement normalization.

Bottom line is we both reimplement interfaces, just at different layers. Our bet on SDKs is mostly about maintenance preferences, not some fundamental flaw in LiteLLM's approach.