[BUG] Gemini 3.7 Support in Vertex - Error #1287

Problem (one or two sentences)

A user is trying to use Gemini 3.7 using the vertex provider, and gets the following message:

it does however work with just the Gemini Provider and API Key, so it's only a Vertex issue.

Date/time: 2026-08-19T08:16:38.964Z
Extension version: 3.79.100388

Provider: vertex
Model: gemini-3.7-flash
Gemini generate context stream error: {"error":

{"message":"{\n "error": {\n "code": 400,\n "message": "Requests ending with a model turn are not supported.", \n "status": "INVALID_ARGUMENT"\n}\n} \n","code":400,"status":"Bad Request"}}

Context (who is affected and when)

While using Gemini 3.7 on Vertex provider

Reproduction steps

Selecting Gemini 3.7 in Vertex provider and trying to use Zoo Code

Expected result

code generation starts

Actual result

error message received instead of code

Variations tried (optional)

No response

App Version

3.79.100388

API Provider (optional)

Google Vertex AI

Model Used (optional)

Gemini 3.7-flash

Zoo Code Task Links (optional)

No response

Relevant logs or errors (optional)

Provider: vertex
Model: gemini-3.7-flash
Gemini generate context stream error: {"error":
{"message":"{\n \"error\": {\n \"code\": 400,\n \"message\": \"Requests ending with a model turn are not supported.\", \n \"status\": \"INVALID_ARGUMENT\"\n}\n} \n","code":400,"status":"Bad Request"}}