How to allow for multiple images to be created from a single API call?

Google Cloud Build with AI Generative AI & Foundational Models
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Hi,

I am currently have a tool that uses Gemini-2.5-flash-image to generate images. However, I am only getting 1 image to be generated. I want the model to create multiple images for example 3 images at once. What is the ideal way to set it up ?

Is it only possible by looping and calling the model multiple times to get more images ? but that seems inefficient to make multiple calls. Seems like this should be possible within a single call.

It also says in the docs (https://docs.cloud.google.com/vertex-ai/generative-ai/docs/models/gemini/2-5-flash-image): “Maximum number of output images per prompt: 10”

Below is the code Ive setup.

Things ive tried:

- Changing candidate_count value doesn’t create more images.

- I also changed the prompt and asked it to directly created 3 images but still only creates 1 image.

generation_config = GenerateContentConfig(
            
response_modalities
=[Modality.IMAGE],
            
candidate_count
=1,  
            
safety_settings
=[
                SafetySetting(
                    
category
=HarmCategory.HARM_CATEGORY_DANGEROUS_CONTENT,
                    
threshold
=HarmBlockThreshold.BLOCK_ONLY_HIGH,
                ),
            ],
        )

response = client.models.generate_content(
                    model="gemini-2.5-flash-image",
                    contents=f"Generate an image of: {prompt}",
                    config=generation_config,
                )