In the modern world it's completely subjective.
The lowest-level language is probably ASM/machine code, as many people at least edit that regularly, and the highest-level would be LLMs. They are the shittiest way to program, yes, but technically you just enter instructions and the LLM outputs eg. Python, which is then compiled to bytecode and run. Similar to how eg. Java works. And that's the subjective part; many people (me included) don't use LLMs as the only way to program, or only use them for convenience and some help, therefore the highest level language is probably either some drag-and-drop UI stuff (like scratch), or Python/JS. And the lowest level is either C/C++ (because "no one uses ASM anyway"), or straight up machine code.