模型比較
GPT Image 2 vs Nano Banana 2: Same Prompts, Both Results
In our side-by-side test both models spelled every word of a three-line poster correctly. GPT Image 2 followed the brief more literally: it kept the sentence case we asked for, drew one tidy illustration and gave the candid photo a warm, shallow-focus polish. Nano Banana 2 took more liberties, setting the small print in capitals, adding a paper border and produce we didn't ask for, and staging a busier, more lived-in garage. Pick GPT Image 2 when the wording and layout must match the brief; pick Nano Banana 2 for quick 0.5K drafts, very wide banners and edits that pull from up to 14 reference images.
GPT Image 2 is OpenAI's image model, known for spelling text correctly and for precise masked edits. Nano Banana 2 is Google's Gemini 3.1 Flash Image model, built for speed, with sizes from a 0.5K draft up to 4K, up to 14 reference images and optional web or image search. Both create from a prompt and edit your own photos on PopNow, and both are paid per image with no subscription.
一眼看懂
| GPT Image 2 | Nano Banana 2 | |
|---|---|---|
| 出品方 | OpenAI | |
| 模式 | 生成圖片和編輯圖片 | 生成圖片和編輯圖片 |
| 最高解析度 | 4K | 4K |
| 畫面比例 | 15 | 14 |
| 參考圖 | 10 | 14 |
| 起價 | 1 點 （每張） | 6 點 （每張） |
GPT Image 2 vs Nano Banana 2 on the same prompts
Each prompt went to both models once at 1K, GPT Image 2 on medium quality: the market poster and garage photo on one afternoon, the JELLY FEST poster in a later session at 3:4. Render times include the queue.
Round 1 · Poster with exact text
A risograph-style poster for a neighborhood farmers market. Large headline text: "SATURDAY MARKET". Below it, smaller text: "Fresh bread · Local honey · 8am–1pm". Illustrated pears, sunflowers and a wicker basket in mustard, teal and coral ink on cream paper, slight print grain, clean layout with generous margins.
Both spelled “SATURDAY MARKET” and the second line correctly. GPT Image 2 kept “Fresh bread · Local honey · 8am–1pm” in sentence case and drew only pears, sunflowers and a basket. Nano Banana 2 switched that line to capitals, added a deckled paper edge and filled the basket with vegetables we never mentioned.
Round 2 · Candid photo of two people
Candid 35mm photo in a sunny, cluttered home garage: a man in his seventies with deep brown skin and a short gray beard tunes a vintage blue road bike while his adult daughter in denim overalls hands him a wrench, both laughing. Dust floating in the window light, shallow depth of field, natural skin texture, warm afternoon tones.
Both kept the people we described: a man in his seventies with a gray beard and his adult daughter in overalls, mid-laugh. GPT Image 2 went for a tight, warm, magazine-style frame with soft background blur. Nano Banana 2 pulled back to show the whole workshop, with a tool wall and a bike on a repair stand, and printed a real-looking brand name on the frame, which we blurred for this page.
Round 3 · Typography poster with exact text
Photograph of a bold typographic event poster pasted on a sunlit concrete wall: giant chunky rounded letters "JELLY FEST" in tangerine and cobalt, a subtitle "SUMMER PARADE — 08.08" in a clean grotesk typeface, layered with cut-out stickers of wobbling jelly cubes, iridescent soap bubbles and cherries, halftone riso-print texture, lemon-yellow and lilac color blocks; harsh afternoon sun casts a diagonal shadow across the poster. Editorial graphic design, crisp legible text, no logos, no brand names.
Both spelled “JELLY FEST” and “SUMMER PARADE — 08.08” without a slip. GPT Image 2 put the title in tangerine over cobalt as asked, drew true cube-shaped jellies and added no words of its own, though it set a couple of title letters in lower case and the sun's diagonal shadow barely shows. Nano Banana 2 made both title words orange with only a blue outline, invented four extra lines of event copy such as “1PM TILL LATE” and “DOWNTOWN SQUARE”, and swapped the cubes for jelly moulds.
我們看到的差別
- Text in the image
- Neither model misspelled a word. The difference was obedience: GPT Image 2 reproduced the capitalisation and punctuation exactly as written, while Nano Banana 2 restyled the small line in capitals. If a client signs off wording letter by letter, that matters more than the illustration.
- Sticking to the brief
- GPT Image 2 drew what the prompt listed and little else. Nano Banana 2 added things that fit the theme, like extra vegetables, a mock-up paper border and a wall of tools. That's useful on a mood board and extra work when you need a clean asset.
- Photo look
- GPT Image 2 produced a polished, flattering, stock-photo look. Nano Banana 2 looked more like a real snapshot: wider, busier, flatter light and far more background detail. Hands holding the wrench came out natural on both.
- Speed in our run
- Both returned a 1K image in a little over a minute, queue included: about 65 to 70 seconds for GPT Image 2 and 70 to 75 for Nano Banana 2. If you're still hunting for an idea, Nano Banana 2's 0.5K size is the quicker way to sweep options.
- Sizes and shapes
- GPT Image 2 offers 15 aspect ratios up to 21:9 and returns up to ten images in one run. Nano Banana 2 reaches banner shapes as wide as 8:1 and as tall as 1:8, which suits website headers and skyscraper ads.
GPT Image 2 or Nano Banana 2: which to choose
| If you need | Pick | Why |
|---|---|---|
| Wording a client has signed off letter by letter | GPT Image 2 | It kept our capitals and punctuation exactly; Nano Banana 2 restyled one line. |
| A quick sweep of rough ideas | Nano Banana 2 | Its 0.5K size is the cheapest, fastest way to look at many directions. |
| A skyscraper ad or an 8:1 site header | Nano Banana 2 | GPT Image 2 stops at 21:9; Nano Banana 2 goes as wide as 8:1 and as tall as 1:8. |
| Ten takes of one idea in one go | GPT Image 2 | GPT Image 2 can return up to ten images per run. |
| Mixing a face, a product and a backdrop from separate photos | Nano Banana 2 | Nano Banana 2 reads up to 14 reference pictures. |
| A snapshot that feels lived-in rather than staged | Either | Nano Banana 2 went documentary, GPT Image 2 glossy; both kept the people we described. |
選 GPT Image 2，如果你要
- Posters, covers and labels where every word must match the brief
- Ten variations of one idea in a single run
- Clean product or editorial images without surprise props
選 Nano Banana 2，如果你要
- Fast 0.5K drafts before a 2K or 4K final
- Very wide banners and website headers up to 8:1
- Edits that combine a person, a product and a setting from up to 14 photos
提示詞建議
- Put every word that must appear in double quotes, and say how it should be capitalised.
- If you want only what you listed, end the prompt with “nothing else in the frame”. It helps Nano Banana 2 most.
- For photos, name the camera and the light (35mm, window light, late afternoon). Both models respond to camera language.
- Check small print and logos before you publish: either model can invent a brand name on a product.
各自的真實範例
這裡的每張圖、每段影片都是用 GPT Image 2 / Nano Banana 2 生成的。按「做同款」會帶著同樣的提示詞和設定打開生成頁。
GPT Image 2
原圖編輯圖片
需要上傳你自己的圖片
原圖編輯圖片
需要上傳你自己的圖片
生成圖片
關於 GPT Image 2 vs Nano Banana 2 的常見問題
GPT Image 2 比 Nano Banana 2 好嗎？
In our side-by-side test both models spelled every word of a three-line poster correctly. GPT Image 2 followed the brief more literally: it kept the sentence case we asked for, drew one tidy illustration and gave the candid photo a warm, shallow-focus polish. Nano Banana 2 took more liberties, setting the small print in capitals, adding a paper border and produce we didn't ask for, and staging a busier, more lived-in garage. Pick GPT Image 2 when the wording and layout must match the brief; pick Nano Banana 2 for quick 0.5K drafts, very wide banners and edits that pull from up to 14 reference images.
GPT Image 2 和 Nano Banana 2 哪個比較便宜？
在 PopNow 上 GPT Image 2 起價較低：1 點，另一個是 6 點（每張）。兩者都是尺寸越大、長度越長越貴，生成前會顯示準確價格。
Which is better for text in images, GPT Image 2 or Nano Banana 2?
Both spelled our three-line poster correctly. GPT Image 2 kept the exact capitalisation and punctuation, while Nano Banana 2 restyled the small text in capitals. For copy that must match letter for letter, start with GPT Image 2.
Is Nano Banana 2 faster than GPT Image 2?
Not by much at 1K: in our run both came back in a little over a minute with the queue. Nano Banana 2 also has a 0.5K size for quick drafts, which GPT Image 2 doesn't offer.
Can both edit my own photos?
Yes. GPT Image 2 edits up to ten source photos and supports a mask for pinpoint changes. Nano Banana 2 takes up to 14 reference images, which helps when the person, the product and the setting come from different pictures.
Do these models add things I didn't ask for?
Nano Banana 2 did in our test: extra vegetables, a paper border and a real-looking brand name on a bike frame. GPT Image 2 stayed closer to the list. Ask for “nothing else in the frame” and look over small details before you use an image.
這次測試花了多少？
依上面的設定，跑一次 GPT Image 2 要 5 點，Nano Banana 2 要 9 點。就是開始前生成按鈕上顯示的價格。
GPT Image 2 和 Nano Banana 2 可以一起用嗎？
可以。一個 PopNow 帳號、一份點數就能用兩個模型，在生成頁隨時切換，不用重寫提示詞。