Absolutely. I installed clawdbot for just long enough to send a single message, and it burned through almost a quarter of my session allowance. That was enough for me. Meanwhile I can use CC comfortably for a few hours and I've only hit my token limit a few times.
I've had a similar experience with opencode, but I find that works better with my local models anyway.
I have a feeling the different harnesses create new context windows instead of using one. The more context windows you open up with Claude the quicker your usage goes poof.
I've had a similar experience with opencode, but I find that works better with my local models anyway.