Flash Models totally broken for interactions api

Gemini API
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1

Steps to reproduce

  1. Use either gemini-3.5-flash or gemini-3-flash-preview wth the interactions api.

  2. Send a request that previously worked.

  3. The request now fails with the following error:

400 {
  "error": {
    "message": "This model requires the use of the Computer Use tool. See https://ai.google.dev/gemini-api/docs/computer-use#send-request for instructions on adding the tool. If you want to use a custom set of functions instead, see https://ai.google.dev/gemini-api/docs/computer-use#custom-functions.",
    "code": "invalid_request"
  }
}

Expected behavior

The request should continue to work as it did previously, or the client library/documentation should clearly indicate why these models now require the Computer Use tool.

Actual behavior

Requests using gemini-3.5-flash or gemini-3-flash-preview now fail with a 400 invalid_request error requiring the Computer Use tool. Which doesn’t make any sense, since these models don’t support Compute Use at all.

Additional context

Everything worked before, but this error started occurring when using gemini-3.5-flash or gemini-3-flash-preview.

2

Hi! thanks for flagging this.

This is a bug. We are investigating this right now and I’ll update you when its fixed

3

Hi there, we fixed the issue, please let us know if you are still running into the error

4

@Trey_Nguyen thank you for jumping into this and fixing this. Hope tests are added so future rollouts don’t implement these regressions.