Comment by mcintyre1994

That makes sense, though I wonder if Claude is a bit of an outlier there because they have the developer audience?

As an example, GLM document being committed to compatibility with OpenAI: https://docs.z.ai/guides/develop/openai/python

My uninformed guess would be that everyone except the frontier labs is probably motivated to do that too.

Similarly they document configuring Claude Code for their models, so I assume they implement Anthropic’s interface there too: https://docs.z.ai/devpack/tool/claude#manual-configuration