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[TUI] $ spent in context decreases after request #6989
Description
Description
I experienced 2 issues with unreliable $ spent in Context block.
Issue №1: Without model(Sonnet 4.5) change new value in $ spent sometimes decreases by a small amount after message processed(~$0.10), can provide no steps on how to reproduce, seemingly random requests.
Issue №2: After changing model from Sonnet 4.5 to Haiku 4.5 and running first message $ spent in context decreased by ~$2, while billing in Zen seems correct (screenshot attached)
Models: Claude Opus 4.5, Claude Sonnet 4.5, Claude Haiku 4.5.
Provider: Zen
Plugins
OpenCode version
1.0.220
Steps to reproduce
- Have open session with Claude Sonnet 4.5 selected.
- Change model to Claude Haiku 4.5
Expected behavior:
Amount in $ spent increased by correct amount
Actual behavior:
Amount in $ spent decreased by ~$2
Screenshot and/or share link
Operating System
macOS Sonoma 14.1
Terminal
iTerm2
Reacted by Ethan Shumate
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github-actions commentedon Jan 5, 2026
This issue might be a duplicate of existing issues. Please check:
This appears to be a recurring issue where spending values displayed in the context block don't accurately reflect actual charges on the Zen account, similar to your experience where the $ spent decreased after changing models. Feel free to ignore if your case involves different specifics.
artemkalugin01 commentedon Jan 5, 2026
Replying to @github-actions
Issues #3171 and #4160 seem to be related to my problem although there was no info on decreasing spent amount, only about incorrect billing overall.
Hope I provided some additional context with this issue
EthanShoeDev commentedon Jan 6, 2026
My spent figure dramatically increased: https://x.com/ethan_shumate/status/2008654158342353145?s=20
I did switch models many times throughout this thread but I think the miscalculation is not always in the negative direction.
github-actions commentedon Mar 25, 2026
To stay organized issues are automatically closed after 90 days of no activity. If the issue is still relevant please open a new one.