Yeah after my switch to Opus 4.6 I noticed a lot of this. I've been wary that eventually models are going to optimize for token usage increases, since that's how the company makes money. I told it to read the files in my directory (4 files, longest was like 380 lines) and caught it using 14 tool uses- including head -n 20 and tail -n 20 on a file. Definitely a what are you doing moment.
OTOH I find it pretty funny that the instant they manage to make a model that breaks general containment of popularity and usefulness (4.5), the toxicity of the business model kicks in and they instantly enshittify.