Are tools like ChatGPT, GPT,Gemini,Siri, and Grammarly considered Generative AI?

Gemini API
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I was scrolling on Google and found this article about generative ai (https://glance.com/blogs/glanceai/ai-trends/generative-ai-explained-chatgpt-gpt-siri-grammarly-are-they-genai) and now I’m kinda confused like are tools we use everyday like ChatGPT Siri and Grammarly actually considered generative ai? I mean they create stuff but is that the same as what generative ai really is? like and how ChatGPT writes whole paragraphas and Grammarlly suggests sentences but does that count as generative aior is it something else? And Siri answers questions but is it technically generative ai too? The article said something about how generative AI creates new content but I’m not suree if all these tools fit that definition exactly or if they’re different types of aI? Like whre do we draw the line with what counts as generative AI and what doesn’t? Would love to hear what others think about this especially if you’ve read up on generative AI too