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Hidden request billing

·2026.04.17 08:08

Key point

A case report that unused Haiku 4.5 and Gemini 3 Flash requests were counted toward billing on Copilot Pro+.

Details

A Copilot Pro+ subscriber reported that even though they only used GPT-5.4 as their default model in VS Code, their usage suddenly jumped from 250+/1500 to 415/1500.

In particular, after the response stopped in agent mode, they flagged as an issue that new Haiku 4.5 and Gemini 3 Flash requests were counted, which they stated they had never used at all.

The key points are as follows.

  • Confirmed that they normally only used GPT-5.4
  • Usage was initially at around 250+ / 1500 requests
  • It then suddenly increased to 415 / 1500 requests
  • The usage history showed Haiku 4.5 and Gemini 3 Flash requests

The author is not certain whether this increase is related to the stopping issue in agent mode, but finds the unexpected increase in requests itself to be very strange.

usage-trackingai-codinggithub-copilotvscodebillingcopilot-proagent-mode
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