May I ask if "gemini-2.0-flash-thinking-exp-01-21" is now actually pointing to "gemini-2.5-flash-preview-04-17"?
In my configuration, I have explicitly specified "gemini-2.0-flash-thinking-exp-01-21", but the actual returned model is "gemini-2.5-flash-preview-04-17".
Yes, you are right. You can check the version mapping here.