Models
Available AI image generation models and credit pricing on GPT-IMG
2026/06/07
Overview
GPT-IMG provides access to state-of-the-art AI image generation models from leading providers including Google and OpenAI. Each model offers different strengths in terms of quality, speed, and cost.
Available Models
Nano Banana 2
- Provider: Google (Gemini 3.1 Flash Image Preview)
- Strengths: Fast generation with reasoning-guided output, good balance of speed and quality
- Resolutions: 1K, 2K, 4K
- Aspect Ratios: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9
- Quality: Not configurable (single quality level)
- Speed: ~38 seconds
- Cost: 25-50 credits per image, based on resolution
Nano Banana Pro
- Provider: Google (Gemini 3 Pro Image Preview)
- Strengths: Highest quality Google model, excellent for detailed and artistic images
- Resolutions: 1K, 2K, 4K
- Aspect Ratios: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9
- Quality: Not configurable (single quality level)
- Speed: ~46 seconds
- Cost: 45-90 credits per image, based on resolution
GPT Image 2
- Provider: OpenAI (GPT-Image-2)
- Strengths: Most capable OpenAI model, supports quality tiers (Standard/Medium/High) with excellent text rendering
- Resolutions: 1K, 2K, 4K
- Aspect Ratios: 1:1, 2:3, 3:2, 3:4, 4:3, 9:16, 16:9
- Quality: Standard, Medium, High (only model that supports quality selection)
- Speed: ~45 seconds
- Cost: 10-130 credits per image (varies by resolution, quality, and reference-image mode)
Credit Pricing
Each image generation consumes credits. Pricing differs by model.
Nano Banana 2
Pricing varies by resolution:
| Resolution | Cost |
|---|---|
| 1K | 25 credits |
| 2K | 35 credits |
| 4K | 50 credits |
Nano Banana Pro
Pricing varies by resolution:
| Resolution | Cost |
|---|---|
| 1K | 45 credits |
| 2K | 45 credits |
| 4K | 90 credits |
GPT Image 2
Text-to-image pricing based on resolution and quality tier:
| Resolution | Standard | Medium | High |
|---|---|---|---|
| 1K | 10 credits (default) | 20 credits | 65 credits |
| 2K | 15 credits | 20 credits | 65 credits |
| 4K | 25 credits | 30 credits | 120 credits |
Reference-image generation uses GPT Image 2 edit pricing:
| Resolution | Standard | Medium | High |
|---|---|---|---|
| 1K | 25 credits | 35 credits | 75 credits |
| 2K | 35 credits | 45 credits | 80 credits |
| 4K | 50 credits | 60 credits | 130 credits |
Note: Only GPT Image 2 supports the quality parameter. The default text-to-image setting is 1K Standard (10 credits). GPT Image 2 reference-image generation is limited to one reference image and uses the edit pricing table above.
Model Comparison
| Feature | Nano Banana 2 | Nano Banana Pro | GPT Image 2 |
|---|---|---|---|
| Max Resolution | 4K (3840px) | 4K (3840px) | 4K (3840px) |
| Quality Selection | No | No | Yes (Standard/Medium/High) |
| Best For | Quick drafts, iteration | Artistic detail, characters | Text in images, photorealism |
| Min Cost | 25 credits | 45 credits | 10 credits |
| Max Cost | 50 credits | 90 credits | 130 credits |
How to Choose
- Budget-friendly: Use GPT Image 2 text-to-image at 1K Standard for the lowest GPT Image 2 cost (10 credits per image), or Nano Banana 2 at 1K for fast iteration.
- Balanced quality: Use Nano Banana 2 at 2K, or GPT Image 2 at Medium quality, for moderate cost.
- High quality: Use Nano Banana Pro at 2K/4K, or GPT Image 2 at Medium/High quality, for detailed work.
- Text in images: GPT Image 2 excels at rendering text accurately within images.
- Ultra high quality: Use GPT Image 2 at 4K High for maximum detail (120 credits text-to-image, 130 credits with a reference image).
Credit costs are based on FAL pricing with a 70% minimum gross-margin target and may adjust if provider pricing changes.
Questions?
If you have questions about models or pricing, please contact us.