I never write thanks specially if we are finishing. If there are no more interactions is simply wasting money. But when adding new messages I almost always start with "ok great, now let's continue with..." when previous job is ok, so I "reinforce" the clanker as much as I reinforce myself in my train of thought.
You soon won't be able to afford to thank if they start decommissioning old models unless you run local. You are literally wasting energy, it's like leaving your care running for a few minutes for no reason.
I also think it signals that I was happy with that solution in the ongoing conversation.
On the other hand, I'm much more sloppy with my writing.
The token cost is irrelevant, tool calls and reasoning probably dominates.
I've come to terms with it. If AGI ever comes it'll go like hey, at least this sack of meat said please.. Let's kill it last :-)
Claude Code: Anytime. I'm glad we nailed it together. Happy to help. bla bla bla....
Me: Thanks! Codex, you did a great job.
Codex: Understood.
It finally clicked to me when Peter Steinberger mentioned that 50% of Codex's workforce is European.
Best regards