Pretty sure the post is misleading. I asked Bard about it and it seems it's still running on the LaMDA model— Gemini Pro is only available for certain beta testers for text-based prompts at this time.
There's a wider release on December 13, but it's unclear to me if it's too a wider audience or a wider set of tools for the limited audience.
That's pretty rich considering Gemini says doesn't even know what you said two messages ago.