OpenAI’s and Google’s top image models. GPT Image 2.5 costs less at every size; Nano Banana Pro is Google’s heavier Gemini model. Try one prompt on both.
Updated 2026-11-12
Each prompt below is built to show one difference. Load it, generate, then switch the model in the generator and generate again. The button shows what each image costs.
Tests: A headline plus a line of small print. Check the spelling at both sizes.
Text to image · 1:1
Prompt: A travel poster that reads "LISBON" in large letters with "Spring 2027 · Tram 28 · Alfama" in small type underneath, a yellow tram on a steep street, flat illustration
Tests: Google says Nano Banana Pro keeps up to 5 people consistent. Look at eyes, hands and whether every face is distinct.
Text to image · 1:1
Prompt: Five friends of different ages laughing around a dinner table, all faces clearly visible, warm evening light, candid photo
Tests: Many labels in a small space. Count the steps and check that every label is readable.
Text to image · 1:1
Prompt: An infographic titled "How Coffee Gets to Your Cup" with six numbered steps from farm to café, small labels under each icon, clean white background
Tests: Upload a product photo first. See whether the label and the shape survive the new scene.
Image edit · 1:1
Prompt: Place this product on a marble bathroom shelf in soft morning light, keep the label and the shape exactly as they are
GPT Image 2.5
Pick it for price and fast rounds
Nano Banana Pro
Pick it for Google’s heavier model
GPT Image 2.5 is the cheaper of the two at every size: 10 credits at 1K against 28 for Nano Banana Pro, and 25 against 36 at 4K. Nano Banana Pro is Google’s heavier Gemini 3 Pro Image model, and Google highlights text in many languages and up to five consistent people. Claims aside, the quickest answer is one prompt on both, above.
How this page compares: specs and prices come from the generator’s own code, so they match what you are charged. What each model does better comes from OpenAI’s and Google’s own announcements, and we say so wherever we use them. We haven’t scored the models; the test prompts above let you judge with your own eyes.
What each model does in our image generator today. A highlighted cell is the stronger side on that line.
| Feature | GPT Image 2.5 | Nano Banana Pro |
|---|---|---|
| Maker | OpenAI | |
| Version | Flare (fast) | Gemini 3 Pro Image |
| Resolution | 1K, 2K, 4K | 1K, 2K, 4K |
| Reference images | Up to 14 | Up to 8 |
| Aspect ratios | 8 ratios | 10 ratios |
| Price at 1K | 10 credits | 28 credits |
| Price at 2K | 15 credits | 28 credits |
| Price at 4K | 25 credits | 36 credits |
| Watermark | None added by Imgveo | No visible mark; Google’s SynthID inside |
Reference limits are this page’s generator. The Studio caps every model at a lower number.
Both families have several versions, and many comparisons online mix them up. Here is the map.
| Name | Maker | What it is | On Imgveo |
|---|---|---|---|
| GPT Image 2.5 · Flare | OpenAI | The fast default version of ChatGPT Images 2.5 | Yes, on this page |
| GPT Image 2.5 · Sunburst | OpenAI | A slower version tuned for precise edits | No |
| Nano Banana Pro | Gemini 3 Pro Image, the heavier Pro model | Yes, on this page | |
| Nano Banana 2 | Gemini 3.1 Flash Image: newer, faster and cheaper | Yes, on its own page |
Many published wins for GPT Image 2.5 are Sunburst’s. Imgveo runs Flare, so this page doesn’t borrow those scores.
Both makers lead with text. Google says Nano Banana Pro renders legible text in many languages and can translate the text inside an image. OpenAI says ChatGPT Images 2.5 improves fidelity and keeps details consistent across edits.
Whichever you pick, the same habits help: put the exact words in quotes, keep each block short, and say where it goes, such as “headline at the top, small print at the bottom”. Check the spelling at full size before you use the image.
Google says Nano Banana Pro reads up to 14 input images and keeps up to 5 people consistent. In this page’s generator, Nano Banana Pro takes up to 8 references and GPT Image 2.5 up to 14.
A reference adds to the price: GPT Image 2.5 goes from 10 to 12 credits at 1K, Nano Banana Pro from 28 to 32.
Both make 4K images on Imgveo: GPT Image 2.5 for 25 credits, Nano Banana Pro for 36. Below 4K, Nano Banana Pro charges the same 28 credits for 1K and 2K, so if you pick it, 2K is the better deal.
For print and big screens, render the final at 4K. While you are still deciding on the layout, draft at 1K first.
Every number below comes from the same code that charges you, so it changes when our prices do. Failed images are refunded.
| Resolution | GPT Image 2.5 | GPT Image 2.5 + reference | Nano Banana Pro | Nano Banana Pro + reference |
|---|---|---|---|---|
| 1K | 10 | 12 | 28 | 32 |
| 2K | 15 | 18 | 28 | 32 |
| 4K | 25 | 35 | 36 | 40 |
A hundred 2K images cost 1,500 credits on GPT Image 2.5 and 2,800 on Nano Banana Pro.
Credits come with every plan, and bigger plans make each credit cheaper. See plans
Six common jobs, and the model we would start with for each.
GPT Image 2.5 at 1K, 10 credits an image. Ten drafts cost 100 credits; on Nano Banana Pro that buys 3.
Run the text test above on both. If they tie, GPT Image 2.5 costs less for every round of changes.
Nano Banana Pro, which Google says keeps up to 5 people consistent. Check every face at full size.
GPT Image 2.5, which takes up to 14 references in this page’s generator against 8.
Either one: 25 credits on GPT Image 2.5, 36 on Nano Banana Pro.
Start with Nano Banana Pro, whose multilingual text Google highlights, and check the spelling with a native speaker.
Sources: OpenAI · ChatGPT Images 2.5 · Google · Nano Banana Pro
Same prompt, two models, one page. Generate, switch the model in the generator, and keep the image you like.
ChatGPT and GPT are trademarks of OpenAI; Gemini and Nano Banana are trademarks of Google LLC. Imgveo is an independent platform and is not affiliated with either company.