AI Image Generation: 8 Models Compared — From 500 to 15,000 Credits

> TL;DR: 8 AI image models from 500 to 15,000 credits per image. Nano Banana 2 (500 cr) is the cheapest fast model; GPT Image 1.5 high quality runs 15,000 cr. FLUX 2 Pro, Seedream 4.5, and Grok Image cover style and realism tradeoffs.

DubVoice.ai offers 8 AI image generation models ranging from the 500-credit budget Nano Banana 2 to premium photorealistic outputs. Each model has unique strengths — here's how to choose the right one.

Budget Tier (500 - 2,000 credits)

Nano Banana 2 (500 credits)

The cheapest option. Fast general-purpose model with up to 4 reference images, ideal for mood boards and concept exploration.

Best for: Quick iterations, concept exploration, social media drafts.

Nano Banana (2,000 credits)

Google Gemini-powered model with a standout feature: optional reference images (up to 10) auto-route to the edit endpoint, so the same call handles both text-to-image and image edits.

Best for: Brand-consistent imagery, style matching, creating series of visually coherent images.

Mid Tier (3,000 - 5,000 credits)

Nano Banana Pro (3,500 – 15,000 credits)

Premium Gemini 3 Pro Image Preview. Resolution-tiered (1K = 3,500, 2K = 6,000, 4K = 15,000). Image-to-image with up to 8 reference uploads.

Best for: Platform-specific content (Instagram squares, YouTube thumbnails 16:9, Pinterest 2:3).

GPT Image 1.5 (5,000 credits)

OpenAI's photorealistic model. Excels at generating images that look like real photographs — faces, products, scenes, and environments.

Best for: Product photography, realistic mockups, photorealistic marketing materials.

FLUX 2 Pro (5,000 credits)

Black Forest Labs' professional model with reference image support. Upload an image and generate variations, or create new images guided by a reference.

Best for: Product variations, character consistency, iterating on a design concept.

Premium Tier (10,000 credits)

Nano Banana 2 (3,000 – 10,000 credits)

Gemini 3 Flash Image Preview. Flat 5,000 credits per render. Image-to-image with up to 16 reference uploads. Optimized for speed.

Best for: Complex scenes, detailed illustrations, any project where prompt accuracy matters most.

Supported Aspect Ratios

All models support flexible aspect ratios:

Tips for Best Results

• Be specific in your prompt — "A golden retriever playing in autumn leaves, soft afternoon light, shallow depth of field" beats "dog in park"
• Use reference images when available (Nano Banana, FLUX 2 Pro) for consistent style
• Start cheap, refine expensive — Use Nano Banana 2 (500 credits) to test prompts, then switch to a premium model for the final version
• Match the model to the task — Need text rendering? Use Nano Banana Pro. Need photorealism? GPT Image 1.5. Need 4K? Nano Banana Pro at 4K or GPT Image 2 at 4K.
• Try multiple models — The same prompt produces very different results across models. Experiment!

Getting Started

Navigate to the Image Generation tool in your DubVoice.ai dashboard. Select your model, enter a prompt, choose your aspect ratio, and generate. All images are saved to your history for easy access.