In @Logan_Kilpatrick post: Gemini 2.5 Pro Preview: even better coding performance - Google Developers Blog
The previous iteration (03-25) now points to the most recent version (05-06), so no action is required to use the improved model
However local testing has shown that as of today 2025-05-07T23:00:00Z the remapping is not in place.
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03-25 artifact: 9x9 Go Board Request - AI Conversation - Sam Saffron's Blog
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Paid tier 05-06 artifact: 9x9 Go Board: Just Build It - AI Conversation - Sam Saffron's Blog
It is clear the remapping is not in place from the quality of the artifact, additionally the raw response says: "modelVersion": "gemini-2.5-pro-exp-03-25"
Local testing did reveal the remapping was in place shortly after the release, but somehow thought text messages snuck in so I feel like Google temporarily cut off the remapping.
Wondering when the remapping will be in place again?
Also, the refreshed Gemini 2.5 Pro is nothing short of stunning for artifact creation and edits!