Image model vs image model
Gemini 3.1 Flash Image (Nano Banana 2) vs Z-Image Turbo
People picked Gemini 3.1 Flash Image (Nano Banana 2)’s picture over Z-Image Turbo’s about 76% of the time in blind votes. Z-Image Turbo costs 13× less ($0.067 against $0.005 an image), so it wins when “good enough” will do.
At a glance
Longer bar means the bigger number. Elo bars start at 800.
Blind votes · how often people would pick each picture
Gemini 3.1 Flash Image (Nano Banana 2) Z-Image Turbo
Price per image · 1024×1024, lower is better
Text to image · arena Elo, higher is better
Where they sit among all 56 image models
Up and to the left is better pictures for less money. Hover or tap a dot for its numbers, then click it to compare that model with Gemini 3.1 Flash Image (Nano Banana 2). Models the arena hasn’t rated yet sit in the grey lane at the bottom.
Which one to pick
Pick Gemini 3.1 Flash Image (Nano Banana 2) if
- you want the better picture: in blind votes people chose its image over Z-Image Turbo’s about 76% of the time
- you need to edit pictures you upload; Z-Image Turbo only makes new ones here
Pick Z-Image Turbo if
- price matters: 100 images cost $0.50, against $6.70 with Gemini 3.1 Flash Image (Nano Banana 2)
- you want open weights you can run yourself
The specs
| Spec | Gemini 3.1 Flash Image (Nano Banana 2) | Z-Image Turbo |
|---|---|---|
| Price per image | $0.067 | $0.005 |
| 100 images | $6.70 | $0.50 |
| Text-to-image Elo | 1140 ±10 (#7 in the arena) | 936 ±11 (#72 in the arena) |
| Editing Elo | 1123 ±12 (#12 in the arena) | Not scored yet |
| Arena votes | 16,075 | 8,170 |
| Edits uploaded pictures | Yes | No |
| Largest size | 4K | — |
| Open weights | No | Yes |
| Zero data retention | No | — |
| Lab | Alibaba | |
| Official name | Gemini 3.1 Flash Image (Nano Banana 2) | Z-Image Turbo |
| Released | May 2026 | November 2025 |
Elo ± is the 95% margin. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai.
Questions
Which is better, Gemini 3.1 Flash Image (Nano Banana 2) or Z-Image Turbo?
People picked Gemini 3.1 Flash Image (Nano Banana 2)’s picture over Z-Image Turbo’s about 76% of the time in blind votes. Z-Image Turbo costs 13× less ($0.067 against $0.005 an image), so it wins when “good enough” will do.
Which is cheaper, Gemini 3.1 Flash Image (Nano Banana 2) or Z-Image Turbo?
Z-Image Turbo: $0.005 for a 1024×1024 image, against $0.067 for Gemini 3.1 Flash Image (Nano Banana 2). 100 images cost $0.50 and $6.70.
Can Gemini 3.1 Flash Image (Nano Banana 2) and Z-Image Turbo edit images?
Gemini 3.1 Flash Image (Nano Banana 2) can change a picture you upload. Z-Image Turbo only makes new pictures from a prompt here.
How can I compare Gemini 3.1 Flash Image (Nano Banana 2) and Z-Image Turbo myself?
Open the comparison, type one prompt and both models draw it side by side, each with what it cost and how long it took. You sign up with Google before your first run, and new accounts start with free credit.
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Where the numbers come from
Quality scores are Elo ratings from the Artificial Analysis image arenas, where people vote between two pictures made from the same prompt without knowing which model made which. The vote split comes from the Elo gap. Prices are for one 1024×1024 image from the Vercel AI Gateway and fal.ai; models billed per token are estimated at the quality the arena scored. The sample pictures are our own runs. Updated October 25, 2026.