Quick answer
- GPT Image 2: $0.053 per image.
- Nano Banana 2: $0.067 per image.
- Nano Banana Pro: $0.134 per image in this comparison.
- Bottom line: GPT Image 2 is 21% cheaper than Nano Banana 2, and Nano Banana Pro is 2x Nano Banana 2.
What is the official cost per image in this comparison?
| Model | Model ID | Official cost per image |
|---|---|---|
| GPT Image 2 | gpt-image-2 | $0.053 |
| Nano Banana 2 | gemini-3.1-flash-image-preview | $0.067 |
| Nano Banana Pro | gemini-3-pro-image-preview | $0.134 |
Which one is cheapest?
In this simplified comparison, GPT Image 2 is the cheapest of the three.
- GPT Image 2: $0.053
- Nano Banana 2: $0.067
- Nano Banana Pro: $0.134
That means GPT Image 2 is about 21% cheaper than Nano Banana 2 in this comparison. Nano Banana Pro is about 2x Nano Banana 2, and about 2.5x GPT Image 2.
How many images can you generate with $10 and $100?
Using the same simplified per-image prices and rounding down to whole images:
| Model | Approx. price per image | Approx. images with $10 | Approx. images with $100 |
|---|---|---|---|
| GPT Image 2 | $0.053 | 188 | 1,886 |
| Nano Banana 2 | $0.067 | 149 | 1,492 |
| Nano Banana Pro | $0.134 | 74 | 746 |
GPT Image 2 vs Nano Banana 2 vs Nano Banana Pro image examples
Below are side-by-side image examples generated from the same prompt on GPT Image 2, Nano Banana 2, and Nano Banana Pro.
Example 1: Product photo
Prompt: Create a studio-quality product photo of a premium sparkling water can called "AURORA" on a wet black stone surface with lemon slices and soft rim lighting. The can label should clearly read "AURORA", "Sparkling Water", and "Lemon". Photorealistic, commercial ad style, high detail.
Verdict: GPT Image 2 produced the strongest commercial product shot here. Nano Banana 2 was close, while Nano Banana Pro looked stylish but simpler on label detail.
Example 2: Marketing creative
Prompt: Design a clean square travel ad for Kyoto in spring. Show cherry blossoms, a red temple gate, and two travelers walking through the scene. Add readable headline and subtext: "Kyoto in Bloom", "4 Days from $899", and "Book by April 30". Modern, premium, social-ad composition.
Verdict: GPT Image 2 handled the ad layout and promo text best. Both Nano Banana outputs matched the scene, but their typography and layout were less controlled.
Example 3: Infographic
Prompt: Create a flat-design infographic explaining the water cycle for students. Use four labeled steps with arrows and simple icons: "Evaporation", "Condensation", "Precipitation", and "Collection". Clear spacing, readable text, pastel color palette, white background.
Verdict: GPT Image 2 gave the clearest classroom-ready infographic. Nano Banana 2 was usable but busier, and Nano Banana Pro was the simplest version with the least detail.
How long does each image take to generate?
These times are from this quick test only, so they can be faster or slower at other times.
| Example | GPT Image 2 | Nano Banana 2 | Nano Banana Pro |
|---|---|---|---|
| Product photo | 44s | 13s | 19s |
| Marketing creative | 55s | 25s | 15s |
| Infographic | 52s | 16s | 20s |
Frequently Asked Questions
Is GPT Image 2 cheaper than Nano Banana 2?
Yes. GPT Image 2 is $0.053 per image and Nano Banana 2 is $0.067, so GPT Image 2 is 21% cheaper.
Are these ChatGPT and Gemini app prices or API prices?
These are API list prices from the official OpenAI and Google developer pricing pages. Consumer app plans use separate subscription allowances and quotas.
Can the total bill still be higher than these per-image numbers?
Yes. Prompt tokens, edit inputs, grounding, and other request details can add cost. This article focuses on the published image output price or per-image equivalent.