You’re right, I don’t have an inner monologue.
Only when I think about words or text literally, like when formulating this reply, I ‘sense’ the words that I come up with. Though I don’t ‘hear’ them.
I also have aphantasia. I can’t mentally ‘see’ things when I imagine them. I can ‘sense’ them, just like the words I formulate. It’s as if I know the thing I imagine is there, but it’s behind a blackout curtain.
Interesting topics! How little we still know about our own brain. And how different our brains seem to work.
Whether via inner monologue or explicit talking to myself, vocalizing mentally or out loud is always faster than typing to me, even though I type rather fast.
Still, that's only a "mid gear" for me. The ultimate state of greatest focus, attention and speed, is wordless flow. Inner monologue shuts off near completely there; I don't need to formulate words in my head to do things, I just feel and do. It's my favorite state to be in, and it's where what I consider my best work has been done, but sadly, I very rarely attain such state.
So: Inner monologue < Talking to myself << Wordless flow
(Funny thing, if you were to record me talking to myself, you'd see pretty much the same thing as in LLM thinking traces - including all the "but wait!" bits. My personal "brain dump" journal looks very much like GPT-4/Deepseek-R1 thinking traces - i.e. back before companies realized thinking traces are great for model distillation, and replaced them with summaries.)