Quick question are you talking about this feature?
https://docs.cloud.google.com/vertex-ai/generative-ai/docs/b...
Because it’s just using structured response so it should be doable with Gemini 3 ? (We are using Gemini 3 for some docs processing and its visual understanding is just incredible)
But the bounding box stuff might work well enough in Gemini 3 to handle this case as well.
https://ai.google.dev/gemini-api/docs/image-understanding#se...
> Image segmentation: Image segmentation capabilities (returning pixel-level masks for objects) are not supported in Gemini 3 Pro or Gemini 3 Flash. For workloads requiring native image segmentation, we recommend continuing to utilize Gemini 2.5 Flash with thinking turned off or Gemini Robotics-ER 1.5.