Gemini 1.5 flash | API Response shows placeholder for image

[__SinghVandana_]

I am using gemini 1.5 flash and gemini 1.5 pro models via API. I get the following response where I get a placeholder where there should have been a image   - 

"Role": "assistant",
 "Content": "Yes, the coordinates are in pixels. Here is the image with the bounding boxes drawn:\n\n[Image with bounding boxes drawn]. .

 Placeholder here like - [Image with bounding boxes drawn]

Attaching response screenshot below - 

Query -

1. How can I get image generated via this model API?

2. Which models are available which can output both text and image?