Starting April 29, 2025, Gemini 1.5 Pro and Gemini 1.5 Flash models are not available in projects that have no prior usage of these models, including new projects. For details, see Model versions and lifecycle.

Imagen 4 Ultra Generate

This guide describes the capabilities and features of imagen-4.0-ultra-generate-001, the latest image generation model from Imagen.

Model ID	`imagen-4.0-ultra-generate-001`
Capabilities	Supported Image generation Digital watermarking and verification User-configurable safety settings Prompt enhancement using prompt rewriter Preview feature Person generation Provisioned Throughput Dynamic shared quota Not supported Image customization using few-shot learning Subject customization for product, person, and animal companion Style customization Controlled customization Instruct customization or style transfer Mask-based image editing Mask-free image editing Insert objects in images Remove objects from images Outpainting Product image editing Upscale images Negative prompting
Image ratios and resolutions	1:1: 1024x1024 3:4: 896x1280 4:3: 1280x896 9:16: 768x1408 16:9: 1408x768 1:1: 2048x2048 3:4: 1792x2560 4:3: 2560x1792 9:16: 1536x2816 16:9: 2816x1536
Prompt languages	English Chinese (simplified) Preview feature Chinese (traditional) Preview feature Hindi Preview feature Japanese Preview feature Korean Preview feature Portuguese Preview feature Spanish Preview feature
Limits	Maximum API requests per minute per project: 30 Maximum images returned per request (text-to-image generation): 4 Maximum image size uploaded or sent in a request (MB): 10 MB Maximum input tokens (text-to-image generation prompt text): 480 tokens

For Imagen pricing information, see the Imagen section of the Cost of building and deploying AI models in Vertex AI page.

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Imagen 4 Ultra Generate