The purpose
We will use Gemini 2.5 Flash Image (nano-banana) and compare it with Gemini 2.5 Flash Image.
Gemini 2.5 Flash Image (nano-banana) is a hot topic, as it is said to excel at image correction.
How to use
Go to Google AI Studio.
Confirm that the area in the red box at the top right of the screen is set to Gemini 2.5 Flash Image Preview or nano-banana.
If it’s set to something else, click it to change.
All that’s left is to enter your prompt into the edit box below and execute it. (Execution will not happen by hitting return. Please click the “Run” button on the left or press Ctrl + Return.)
Input image
Drag and drop an image into the prompt editor.
(You can also upload it from the “+” on the right.)
Start a new chat
Click Chat on the left side of the screen. (Gemini 2.5 Flash Image tends to try and modify an image it has already generated. To generate a new image, it’s recommended that you start a new chat.)
comparison
image generation
English Prompt
Prompt
A photorealistic close-up portrait of an elderly Japanese ceramicist with
deep, sun-etched wrinkles and a warm, knowing smile. He is carefully
inspecting a freshly glazed tea bowl. The setting is his rustic,
sun-drenched workshop. The scene is illuminated by soft, golden hour light
streaming through a window, highlighting the fine texture of the clay.
Captured with an 85mm portrait lens, resulting in a soft, blurred background
(bokeh). The overall mood is serene and masterful. Vertical portrait
orientation.
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
I believe both images were created exactly as prompted.
However, it seems that the vertical format was ignored with Gemini 2.0 Flash Image (nano-banana). (This might be an issue with the environment, not the model itself.)
Japanese Prompt
Prompt
深いシワが刻まれ、温かく物知りな笑顔を浮かべた年配の日本人陶芸家の、写実的なクローズアップポートレート。彼は、焼き上がったばかりの茶碗を丁寧に吟味している。舞台は、素朴で陽光が差し込む彼の工房。窓から差し込む柔らかい夕方の光が、粘土の繊細な質感を際立たせている。85mmのポートレートレンズで撮影されており、背景は柔らかくぼかされている（ボケ）。全体的な雰囲気は穏やかで、熟練の技が感じられる。縦長のポートレート。
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
Using a Japanese prompt yielded the same result.
logo generation
I was quite impressed with this model’s logo creation.
English Prompt
Prompt
Create a modern, minimalist logo for a coffee shop called 'The Daily Grind'. The text should be in a clean, bold, sans-serif font. The design should feature a simple, stylized icon of a a coffee bean seamlessly integrated with the text. The color scheme is black and white.
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
In my opinion, and acknowledging that it’s a matter of preference, Gemini 2.0 Flash Image was not able to read text well, whereas Gemini 2.0 Flash Image (nano-banana) seemed better.
Image correction
We will attempt image correction, for which Gemini 2.5 Flash Image (nano-banana) is said to excel.
Input Image
Background change
Prompt
change background to town
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
Background change（Japanese）
Prompt
背景を町に変更
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
Failure (image was not generated).
For this image, even Gemini 2.0 Flash Image reproduces the original faithfully, but with some images, the original could become completely different (see below).
Also, since the meaning can be lost in Japanese, it seems better to perform image editing in English.
Other
Gemini 2.0 Flash Image (nano-banana) is more faithful to the original image in this example.
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
change in emotion（Cry）
Gemini 2.0 Flash Image (nano-banana) is more faithful to the original image in this example.
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
Hats added（Add Hat）
Coincidentally, Gemini 2.0 Flash Image (nano-banana) added a hat that fits the atmosphere better.
Gemini 2.0 Flash Image
Gemini 2.0 Flash Image(nano-banana)
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