CompareImage model comparison

GPT Image 2 vs Nano Banana

In Vizify, Nano Banana means Gemini 3.1 Flash Image, the model its tools run. It and GPT Image 2 share the same model limits: 1K, 2K, or 4K output and up to eight reference images. The differences are in defaults, tool controls, and editing.

Capabilities reviewed 2026-09-26 · Evidence reviewed 2026-09-26

Open GPT Image 2 Generator Open Nano Banana AI Image Generator
How this comparison was made

Method and test inputs

Both image policies were checked in Vizify's generation parameter catalog and generated public catalog, together with the controls and upload limits of the Site's named GPT Image 2 and Nano Banana tools and the image allowance in the product configuration. No images were generated to judge fidelity or text rendering, and no external leaderboard is used.

  • Generation catalog parameters for gpt-image-2 and gemini-3.1-flash-image
  • Controls and attachment limits of the GPT Image 2 Generator and Nano Banana tools
  • Default image model in the Vizify app profile
  • Free image allowance and paid gate in the product configuration
Side by side

GPT Image 2 vs Nano Banana

CriterionGPT Image 2Nano Banana
Model behind the nameGPT Image 2Gemini 3.1 Flash Image
Default image model in VizifyYesNo
Output resolution entries1K, 2K, 4K (1K default)1K, 2K, 4K (1K default)
Reference images per requestUp to 8Up to 8
Controls on the named generator pageAspect ratio: Auto, 1:1, 3:2, 2:3; no resolution pickerResolution 1K, 2K, or 4K; aspect ratio Auto, 1:1, 16:9, 9:16
Dedicated editing toolNone on the SiteNano Banana Image Editing, taking 1–8 source images
AccessTwo free image generations per signed-in account, then Pro or a credit packSame allowance; it is shared across all image models
Related models on the same Vizify pageNone; GPT Image 2.5 Flare and Sunburst have their own pageGemini 2.5 Flash Image, 3.1 Flash Lite Image, and 3 Pro Image
Choosing

Which one fits your task

Option A

GPT Image 2

Vizify's default image model, used when a request names no other image policy. Its generator page offers four aspect choices and up to eight references.

  • Starting from the image model Vizify uses by default
  • Guiding a new image with up to eight reference pictures
  • Auto, square, 3:2, or 2:3 framing picked on the tool page

Use GPT Image 2 when you want Vizify's default image model, or 3:2 and 2:3 framing straight from the generator page. It still supports 2K and 4K; ask for the resolution in your brief, since that tool has no resolution picker.

Open GPT Image 2 GeneratorGPT Image 2 details
Option B

Nano Banana

Gemini 3.1 Flash Image, the policy both Nano Banana tools use. It has a 1K/2K/4K picker on its generator and a separate editing tool.

  • Picking 1K, 2K, or 4K on the tool page before the request runs
  • Editing an existing picture through the dedicated Nano Banana editing tool
  • Landscape 16:9 or portrait 9:16 framing from the generator's controls

Use Nano Banana when you want to set 1K, 2K, or 4K on the tool page, frame in 16:9 or 9:16, or edit an existing image in the dedicated Nano Banana editing tool.

Open Nano Banana AI Image GeneratorNano Banana details
Before you rely on this

Current limitations

  • Checked against Vizify's generation catalog and tool contracts on 2026-09-26. Photorealism, prompt adherence, and lettering accuracy were not tested for either model.
  • Both models list identical resolution and reference limits, so the page cannot separate them on model parameters alone.
  • Tool-page controls are a Site convenience; the Agent validates each request against the model's own catalog entry before running it.
  • Only Gemini 3.1 Flash Image is compared from the Nano Banana family. Gemini 3 Pro Image and the lighter Flash variants are on /models/nano-banana/.
  • Each image request uses one model. Vizify does not render the same prompt with GPT Image 2 and Nano Banana in one step.

This page answers a narrow question about GPT Image 2 and Nano Banana: what each one lets you do inside Vizify today. At the model level, the answer is “the same thing”: both image policies list 1K, 2K, and 4K output with 1K as the default, and both accept up to eight reference images alongside the prompt.

The practical differences sit around the models. GPT Image 2 is Vizify’s default image model, so a request that names no image model uses it. Its generator page offers Auto, square, 3:2, and 2:3 framing but no resolution picker. The Nano Banana generator puts 1K, 2K, and 4K on the page and frames in 16:9 or 9:16 instead of 3:2 or 2:3.

Editing is the clearest split. Nano Banana has its own editing tool that starts from one or more existing pictures and a note on what must stay unchanged. There is no GPT Image 2 counterpart on the Site. Both models draw on the same free allowance: two image generations per signed-in account, after which Pro or a credit pack applies.

FAQ

Questions about GPT Image 2 and Nano Banana

Is Nano Banana the same model as Gemini 3.1 Flash Image in Vizify?

For this comparison, yes. Both Nano Banana tools on the Site instruct Vizify to use Gemini 3.1 Flash Image. The family page also lists Gemini 2.5 Flash Image, 3.1 Flash Lite Image, and 3 Pro Image.

Which makes better images, GPT Image 2 or Nano Banana?

This page does not judge image quality. In Vizify's catalog both list 1K, 2K, and 4K output and up to eight reference images.

Can GPT Image 2 produce 4K in Vizify?

Yes. Its policy lists 1K, 2K, and 4K. The GPT Image 2 Generator page has no resolution picker, so state 2K or 4K in your brief when you need it.

Can I edit an existing image with either model?

The Site has a dedicated Nano Banana Image Editing tool that takes one to eight source images. There is no equivalent GPT Image 2 editing tool on the Site.

How many images can I make for free?

A signed-in account gets two free image generations in total, shared across image models and image edits. After that, image generation needs Pro or a credit pack.

Which model does Vizify use if I do not choose one?

GPT Image 2. It is the default image model in the Vizify app profile.

Related

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GPT Image 2 Generator

Prompt, aspect ratio, and up to eight references, sent to GPT Image 2.

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Nano Banana AI Image Generator

Prompt with a 1K, 2K, or 4K picker, run on Gemini 3.1 Flash Image.

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Nano Banana Image Editing

Change an existing image while stating what must stay the same.

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GPT Image 2 model page

Inputs, resolutions, and reference limits for GPT Image 2 in Vizify.

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Nano Banana image models

All four Gemini image policies in the Nano Banana family.

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Seedream 5 vs FLUX.2

Another image pairing, where the Pro models share identical limits.

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Make an image

Open Vizify and generate with GPT Image 2 or Nano Banana.

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