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>Surprising that there isn't a 'hey siri' for chatgpt yet

Sort of a middleman approach and certainly not perfect, but you can invoke ChatGPT with Siri using Shortcuts.

https://help.openai.com/en/articles/7993358-chatgpt-ios-app-...

Interesting, do you know whether this can invoke Voice Mode?

I switched to Claude, but when I was still using ChatGPT, I had a shortcut set up to initiate Voice mode directly, yes. I had set it up for the Action button, but you could surely trigger this with Siri too. You'll likely have to unlock with faceID first though.

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