Not compatible with Claude Models

When I added a Claude Sonnet 4, it did not work since the simple_client isn't integrated for Claude models, just OpenAI. Thus, how were you guys able to show your results, since I am currently trying to replicate them?

Start by locating the simple_client entry point and tracing how it currently handles OpenAI models. Compare that path with the reported Claude Sonnet 4 failure, then verify that Claude models can run and produce the expected results. The issue provides no test file or named implementation file, so the relevant tests and files must be discovered.

Written by the indexing model from the issue text.