Request consumption appears abnormally high — possible double/triple counting #2626

Describe the bug

I'm using the 1x multiplier model (GPT-5.4), but request consumption is behaving
as if a 3x multiplier model is selected. Each interaction burns through quota at
roughly 3x the expected rate, despite explicitly choosing the lower-cost model tier.

This started approximately 3 days ago with no changes on my end, same model
selection, same workflows, same shell environment.

Affected version

GitHub Copilot CLI 1.0.22.

Steps to reproduce the behavior

Set model to GPT-5.4
Run a typical planing - implementing workflow, says costs 1x req, but feels like 3x, %'s are increasing way too fast.

Expected behavior

Expected: 1 request deducted per interaction (1x model)
Actual: ~3 requests deducted per interaction — consumption matches a 3x model

Additional context

No response