I really just use Google with Tools set to Verbatim, and search strings like, for example:
site:substack.com transformer LLM OpenAI
It's generally more productive to find a topic you're interested in and then collect a wide variety of articles on that topic from many different sources, rather than to follow any individual source. This isn't really what substack writers like, they want you to pay to follow them, and I guess if you can afford dozens of subscriptions it's a charitable thing to do.
site:substack.com transformer LLM OpenAI
It's generally more productive to find a topic you're interested in and then collect a wide variety of articles on that topic from many different sources, rather than to follow any individual source. This isn't really what substack writers like, they want you to pay to follow them, and I guess if you can afford dozens of subscriptions it's a charitable thing to do.