[BUG] /cost Command Underreporting Actual Charges

Bug Description
I noticed the /cost output is no longer matching how much is being deducted from my account on console.anthropic.com/settings/billing and much more money is actually being deducted than what /cost is reporting. For instance, this short session it's telling me the cost was $0.2230 but I was watching my billing page and it went from balance of $15.73 at the start of this session to $14.30 currently so it deducted $1.43 and not $0.22. This was happening for my earlier sessions but I didn't watch them as carefully and just noticed that /cost was claiming I only spent a couple of dollars today but in reality around $12 got deducted. So I started to watch more closely with this current session. What's happening with the billing? Is /cost broken or is it overcharging? It feels like the latter to me based on previous usage.

Environment Info

• Platform: linux
• Terminal: gnome-terminal
• Version: 0.2.107
• Feedback ID: 9361be75-a09a-4ebf-8dfd-2b4d0be7415c