更新于 2026-10-27

Nano Banana 2.1 和 GPT Image 2.5，哪个更适合你？

改图选 GPT Image 2.5：同一张照片做 10 组改图，它赢 4 组，Nano Banana 2.1 赢 2 组，另外 4 组打平。例外是老照片修复，两次都是 Nano Banana 2.1 保住了人脸和构图。文生图两边很接近：同样价位的 8 组里，GPT Image 2.5 只赢了 1 组（海报上没有多加字）。所以按格式选：要 4K 或超宽横幅，用 Nano Banana 2.1；要透明背景的抠图，用 GPT Image 2.5。

在 zzo.ai 上，Nano Banana 2.1 生成一张 1K 画质的图片要 10 积分（$0.10）。在 zzo.ai 上，GPT Image 2.5 生成一张高画质的图片要 15 积分（$0.15）。

Nano Banana 2.1

谷歌

10 积分 · $0.10 · 每张，1K 画质

生成 100 张：1,000 积分，用 $199.99 积分包约 $9.09

试试 Nano Banana 2.1

GPT Image 2.5

OpenAI

15 积分 · $0.15 · 每张，高画质

生成 100 张：1,500 积分，用 $199.99 积分包约 $13.64

试试 GPT Image 2.5

同一条提示词，两个模型

每组都是我们自己在 zzo.ai 上跑的：同一条提示词（改图时用同一张照片）、站内设置，每个模型各跑一次，没有为了挑好结果重跑。

提示词: “Restore the old photograph from the reference image. Show only the photo itself, filling the frame: no table, no paper border, no background around it. Remove all creases, folds, scratches, dust, stains and tears, rebuild any missing corner, and fix the faded and shifted colors. Colorize it with natural, realistic skin tones and period-appropriate clothing colors. Keep every person exactly as they are: same face, same features, same expression, same age, same hairstyle, same pose and same clothing. Do not beautify, slim, smooth or modernize anyone. Keep the original composition and framing. The result should look like a clean, well-preserved original photograph from the same era, not a modern photo.”

Nano Banana 2.1: 老照片修复 — 提示词: “Restore the old photograph from the reference image. Show only the photo itself, filling the frame: no table, no paper border, no background around it. Remove all creases, folds, scratches, dust, stains and tears, rebuild any missing corner, and fix the faded and shifted colors. Colorize it with natural, realistic skin tones and period-appropriate clothing colors. Keep every person exactly as they are: same face, same features, same expression, same age, same hairstyle, same pose and same clothing. Do not beautify, slim, smooth or modernize anyone. Keep the original composition and framing. The result should look like a clean, well-preserved original photograph from the same era, not a modern photo.”

提示词: “Restore this damaged 1948 black-and-white family photograph while preserving the exact identities, ages, facial proportions, poses, clothing, porch architecture, framing, and historical period. Repair the lower-left tear, remove scratches and dust, recover balanced contrast and fine facial detail, and add restrained historically plausible natural color: weathered gray porch boards, muted cream and brown clothing, natural skin tones, and subdued green countryside. Do not beautify faces, change expressions, invent jewelry, alter clothing, add people, remove people, crop, modernize, add text, logo, or watermark. Keep subtle film grain so it remains an archival photograph rather than a modern digital portrait.”

Nano Banana 2.1: 老照片修复上色 — 提示词: “Restore this damaged 1948 black-and-white family photograph while preserving the exact identities, ages, facial proportions, poses, clothing, porch architecture, framing, and historical period. Repair the lower-left tear, remove scratches and dust, recover balanced contrast and fine facial detail, and add restrained historically plausible natural color: weathered gray porch boards, muted cream and brown clothing, natural skin tones, and subdued green countryside. Do not beautify faces, change expressions, invent jewelry, alter clothing, add people, remove people, crop, modernize, add text, logo, or watermark. Keep subtle film grain so it remains an archival photograph rather than a modern digital portrait.”

提示词: “Change her yellow rain jacket to a charcoal-grey wool coat. Make it a rainy evening outside the window, with wet street reflections. Write the words OPEN LATE in white painted letters on the window glass. Keep her face, hair, pose, the coffee cup, the table and the bicycle exactly the same.”

Nano Banana 2.1: 换外套、加雨、改窗上文字 — 提示词: “Change her yellow rain jacket to a charcoal-grey wool coat. Make it a rainy evening outside the window, with wet street reflections. Write the words OPEN LATE in white painted letters on the window glass. Keep her face, hair, pose, the coffee cup, the table and the bicycle exactly the same.”

提示词: “Remove the flower from man's hand. Do not change anything else.”

Nano Banana 2.1: 去掉画面里的东西 — 提示词: “Remove the flower from man's hand. Do not change anything else.”

提示词: “Place the dog from the second image into the setting of image 1, right next to the woman, use the same style of lighting, composition and background. Do not change anything else.”

提示词: “Clean up this photo: remove the loose clutter around the plant (cables, mugs, dishes, food, papers, envelopes, boxes, clothes, laundry rack, vacuum, cleaning bottles, keys, slippers, toys, tissues) and fill the gaps naturally with the same surface, floor and wall. Keep the furniture, the room, the lighting and any date stamp as they are. Keep the plant, every leaf, the pot and the camera angle exactly as they are in the reference photo; do not add, remove or redesign any leaves, and do not change the pot.”

Nano Banana 2.1: 清理照片杂物 — 提示词: “Clean up this photo: remove the loose clutter around the plant (cables, mugs, dishes, food, papers, envelopes, boxes, clothes, laundry rack, vacuum, cleaning bottles, keys, slippers, toys, tissues) and fill the gaps naturally with the same surface, floor and wall. Keep the furniture, the room, the lighting and any date stamp as they are. Keep the plant, every leaf, the pot and the camera angle exactly as they are in the reference photo; do not add, remove or redesign any leaves, and do not change the pot.”

提示词: “Make it look like a winter evening with snowfall.”

Nano Banana 2.1: 夏天变冬天 — 提示词: “Make it look like a winter evening with snowfall.”

提示词: “Retouch this photo professionally: even out skin tone, reduce blemishes, sharpen focus, and balance lighting and color. Do not change the person's face shape, features, proportions, hairstyle, or expression. Keep the result looking like a real, unedited photo of the same person.”

Nano Banana 2.1: 人像精修 — 提示词: “Retouch this photo professionally: even out skin tone, reduce blemishes, sharpen focus, and balance lighting and color. Do not change the person's face shape, features, proportions, hairstyle, or expression. Keep the result looking like a real, unedited photo of the same person.”

提示词: “Take the radio from the first image. Print the LOW TIDE AUDIO logo from the second image onto the radio's front panel, below the cobalt dial, as a small, crisp cobalt-blue screen print that sits flat on the plaster texture. Keep the radio's shape, the cobalt dial, the speaker grille, the paper backdrop, the window light and the shadow exactly the same.”

提示词: “Change the date line "Friday, October 17" so it reads "Saturday, October 18". Keep everything else exactly as it is.”

Nano Banana 2.1: 改海报上的日期 — 提示词: “Change the date line "Friday, October 17" so it reads "Saturday, October 18". Keep everything else exactly as it is.”

Nano Banana 2.1: 演唱会海报 — 提示词: “A minimalist screen-printed concert poster on off-white paper. A large deep-blue wave shape fills the top half. Below it, the headline "NIGHT TIDE" in a bold condensed sans-serif, then "Live at Harbour Hall" in a lighter weight, then "Friday 14 November · Doors 8 PM", and at the bottom "harbourhall.com/nighttide" in small type. No other text.”

GPT Image 2.5: 演唱会海报 — 提示词: “A minimalist screen-printed concert poster on off-white paper. A large deep-blue wave shape fills the top half. Below it, the headline "NIGHT TIDE" in a bold condensed sans-serif, then "Live at Harbour Hall" in a lighter weight, then "Friday 14 November · Doors 8 PM", and at the bottom "harbourhall.com/nighttide" in small type. No other text.”

Nano Banana 2.1: 咖啡袋商品图 — 提示词: “A premium product photo of a matte black coffee bag labeled SUMMIT ROAST with mountain line-art on rustic wood, soft window light, sharp readable packaging typography, photoreal commercial mockup”

GPT Image 2.5: 咖啡袋商品图 — 提示词: “A premium product photo of a matte black coffee bag labeled SUMMIT ROAST with mountain line-art on rustic wood, soft window light, sharp readable packaging typography, photoreal commercial mockup”

Nano Banana 2.1: 抓拍人像 — 提示词: “Create a photorealistic candid photograph of an elderly sailor standing on a small fishing boat. He has weathered skin with visible wrinkles, pores, and sun texture, and a few faded traditional sailor tattoos on his arms. He is calmly adjusting a net while his dog sits nearby on the deck. Shot like a 35mm film photograph, medium close-up at eye level, using a 50mm lens. Soft coastal daylight, shallow depth of field, subtle film grain, natural color balance. The image should feel honest and unposed, with real skin texture, worn materials, and everyday detail. No glamorization, no heavy retouching.”

GPT Image 2.5: 抓拍人像 — 提示词: “Create a photorealistic candid photograph of an elderly sailor standing on a small fishing boat. He has weathered skin with visible wrinkles, pores, and sun texture, and a few faded traditional sailor tattoos on his arms. He is calmly adjusting a net while his dog sits nearby on the deck. Shot like a 35mm film photograph, medium close-up at eye level, using a 50mm lens. Soft coastal daylight, shallow depth of field, subtle film grain, natural color balance. The image should feel honest and unposed, with real skin texture, worn materials, and everyday detail. No glamorization, no heavy retouching.”

Nano Banana 2.1: 纪实摄影 — 提示词: “Candid documentary photograph inside a small ceramics studio. A woman in her early thirties with freckles and curly dark hair laughs while handing a freshly glazed teal mug across a worktable to an older man with a short gray beard and clay-dusted hands. Both faces fully visible and in sharp focus, natural skin texture with visible pores and fine lines, no retouching. Late afternoon window light from the left, dust in the air, shelves of unglazed pots softly blurred behind them. Shot on a 50mm lens at f/2, warm film grain.”

GPT Image 2.5: 纪实摄影 — 提示词: “Candid documentary photograph inside a small ceramics studio. A woman in her early thirties with freckles and curly dark hair laughs while handing a freshly glazed teal mug across a worktable to an older man with a short gray beard and clay-dusted hands. Both faces fully visible and in sharp focus, natural skin texture with visible pores and fine lines, no retouching. Late afternoon window light from the left, dust in the air, shelves of unglazed pots softly blurred behind them. Shot on a 50mm lens at f/2, warm film grain.”

Nano Banana 2.1: 电影感剧照 — 提示词: “A 16:9 horizontal cinematic still, shot from street level looking up at the sharp diagonal steel exterior staircase of a two-story retro motel painted vibrant mustard-yellow against a flamingo-pink stucco facade. An adult woman in an emerald-green mini dress descends the staircase, her hand trailing along the yellow railing. The bright yellow, pink, and green color clash creates a delightful, sun-drenched cinematic mood.”

GPT Image 2.5: 电影感剧照 — 提示词: “A 16:9 horizontal cinematic still, shot from street level looking up at the sharp diagonal steel exterior staircase of a two-story retro motel painted vibrant mustard-yellow against a flamingo-pink stucco facade. An adult woman in an emerald-green mini dress descends the staircase, her hand trailing along the yellow railing. The bright yellow, pink, and green color clash creates a delightful, sun-drenched cinematic mood.”

Nano Banana 2.1: 爵士之夜海报 — 提示词: “A vintage-style concert poster for a fictional jazz night. Headline in large bold letters: "MIDNIGHT BRASS". Below it, smaller: "Saturday, November 14 · Harbor Hall · Doors 8 PM". A stylized trumpet silhouette, deep navy and mustard yellow palette, subtle paper grain.”

GPT Image 2.5: 爵士之夜海报 — 提示词: “A vintage-style concert poster for a fictional jazz night. Headline in large bold letters: "MIDNIGHT BRASS". Below it, smaller: "Saturday, November 14 · Harbor Hall · Doors 8 PM". A stylized trumpet silhouette, deep navy and mustard yellow palette, subtle paper grain.”

Nano Banana 2.1: 灯光秀海报 — 提示词: “Design a square event poster with exactly this English headline: "NIGHT GARDEN". Add exactly this subtitle: "Botanical light show · Kyoto · 7–9 pm". Use luminous botanical silhouettes, deep forest green and warm amber, refined editorial typography, clear contrast, balanced margins, all text fully inside the canvas. Use natural English typography and line breaks without changing any characters. No other words, no translations, no logos, no watermark.”

GPT Image 2.5: 灯光秀海报 — 提示词: “Design a square event poster with exactly this English headline: "NIGHT GARDEN". Add exactly this subtitle: "Botanical light show · Kyoto · 7–9 pm". Use luminous botanical silhouettes, deep forest green and warm amber, refined editorial typography, clear contrast, balanced margins, all text fully inside the canvas. Use natural English typography and line breaks without changing any characters. No other words, no translations, no logos, no watermark.”

Nano Banana 2.1: 日文活动海报 — 提示词: “Design a square event poster with exactly this Japanese headline: "ナイトガーデン". Add exactly this subtitle: "植物のライトショー・京都・19〜21時". Use luminous botanical silhouettes, deep forest green and warm amber, refined editorial typography, clear contrast, balanced margins, all text fully inside the canvas. Use natural Japanese typography and line breaks without changing any characters. No other words, no translations, no logos, no watermark.”

GPT Image 2.5: 日文活动海报 — 提示词: “Design a square event poster with exactly this Japanese headline: "ナイトガーデン". Add exactly this subtitle: "植物のライトショー・京都・19〜21時". Use luminous botanical silhouettes, deep forest green and warm amber, refined editorial typography, clear contrast, balanced margins, all text fully inside the canvas. Use natural Japanese typography and line breaks without changing any characters. No other words, no translations, no logos, no watermark.”

怎么选

zzo.ai 两个模型都提供，价格见本页。推荐依据的是这里列出的规格和局限。

场景	推荐	原因
只改一处，其他不动	GPT Image 2.5	我们上面的 10 组改图里，它赢 4 组，Nano Banana 2.1 赢 2 组。CellCog（2026 年 10 月 25 日）的结论一样：GPT Image 2.5 几乎没动墙、植物、阴影和构图，Nano Banana 2.1 每张都裁得更紧。
修复老照片	Nano Banana 2.1	我们的两组修复里，GPT Image 2.5 都改了人脸或构图，Nano Banana 2.1 都保住了。WeShop 测 2.1 修复老照片时，三个人的长相也都保住了。
保住照片里的人脸	多数时候 GPT Image 2.5	Fuser 的测试里，GPT Image 2.5 把脸清楚地保留了下来，2.1 则把卷发弄松了，雀斑也淡了。但不是每次都这样：BulkImagen 的万圣节测试里，2.1 的脸保得更好。
按文字要求拍商品图	Nano Banana 2.1（略好）	Fuser 和 BulkImagen：2.1 对布景、光线和留白的要求执行得最字面。Atlas Cloud 判为打平；CellCog 则更喜欢 GPT Image 2.5，因为 2.1 把影子放错了方向。
给商品换场景，商品本身不能变	GPT Image 2.5	Fuser 的瓶子改图：GPT Image 2.5 没改动任何提示词要求保留的东西；2.1 保住了标签，但把瓶盖改了样式。
海报和要一字不差的文字	都可以；文案要求严格时选 GPT Image 2.5	我们的 5 张海报（其中一张是日文），两个模型每一行都拼对了。但在 MIDNIGHT BRASS 这张上，Nano Banana 2.1 多加了两行没人要的字，BulkImagen 的测试里也是这样，GPT Image 2.5 则只写了给定的文字。Fuser 和 CellCog 判为打平，Atlas Cloud 在要求页脚一字不差的测试里更看好 2.1。提示词最后加一句“No other text”。
自然、纪实风格的照片	都可以	我们的两张人像也是打平。GPT Image 2.5 更清晰、皮肤细节更重，Nano Banana 2.1 更像纪实照片（CellCog 看到的也一样）；Fuser 判 GPT Image 2.5 小胜。
往照片里加宠物或物品	两个都试试	我们加狗的测试里，GPT Image 2.5 放得很自然，Nano Banana 2.1 像贴上去的。CellCog 加猫的测试正好相反：2.1 的猫最自然。
图表和信息图	Nano Banana 2.1，但要检查	CellCog 的测试里，只有 2.1 把柱子的比例画对了。但它会自己加字：BulkImagen 发现它多加了一句话，还有拼写错误；我们测水循环图时，它把两个阶段都标成了“Condensation”。
透明背景 PNG	GPT Image 2.5	只有 GPT Image 2.5 能输出真正的透明背景。Nano Banana 2.1 的背景总是填满的。
4K 和超宽横幅	Nano Banana 2.1	Nano Banana 2.1 最高 4K，还支持 4:1 和 8:1 的横幅。GPT Image 2.5 在这里长边最多 1280 像素，画面比例最宽到 16:9。

规格对比

	Nano Banana 2.1	GPT Image 2.5
厂商	谷歌	OpenAI
发布日期	2026-10-06	—
类型	图片	图片
模式	文生图, 改图	文生图, 改图
画质	1K, 2K, 4K	低, 中, 高, 超高, 最高
每次张数	4	4
画面比例	1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3, 21:9, 4:1, 8:1	1:1, 4:3, 3:4, 16:9, 9:16
版本	—	GPT Image 2.5 Flare, GPT Image 2.5 Sunburst
可商用	可以，按我们的服务条款	可以，按我们的服务条款
生成失败	积分自动退回	积分自动退回
起步价	10 ($0.10)	5 ($0.05)

我们怎么测的

上面每一组都是同一条提示词（改图时用同一张照片），在 zzo.ai 上用站内设置，每个模型各跑一次。改图时 GPT Image 2.5 用高质量，Nano Banana 2.1 用默认的 1K（1948 年那张老照片用 2K）。文生图用同样的单张价格：GPT Image 2.5 用高质量，Nano Banana 2.1 用 2K。用到的原图都是 AI 生成的虚构照片。每条提示词都出自公开的指南或测试（OpenAI、谷歌、Fuser、Atlas Cloud、BulkImagen、WeShop，以及一位 Reddit 用户），没有为了挑好结果重跑。每个模型只跑一次，只能看出倾向，不算正式评测。

第三方评测怎么说

CellCog（24 条提示词，2026 年 10 月 25 日）：GPT Image 2.5 赢 9 条，Nano Banana 2.1 赢 5 条，10 条打平。去掉透明背景的任务后，两者平均分是 4.67 和 4.62。
Fuser（5 项任务，2026 年 10 月 6 日）：GPT Image 2.5 在人物任务上明显胜出，照片和改图任务小胜；Nano Banana 2.1 赢了商品图；海报打平。
Atlas Cloud（4 轮，2026 年 10 月）：Nano Banana 2.1 四轮里赢了或打平了三轮。
BulkImagen（6 条提示词，2026 年 10 月 7 日）：只有 GPT Image 2.5 整轮没有明显瑕疵。
Arena 众测投票（2026 年 10 月 19 日的数据，仍是初步结果）：GPT Image 2.5 Sunburst 在文生图和单图改图两个榜上，都比 Nano Banana 2.1 高约 100 分。

这四家测试网站都在卖这两个模型的使用权限，每条提示词也都只跑了一次。

两个模型各自容易出错的地方

Nano Banana 2.1： 改图时会重新裁图或重摆画面，会加你没要求的字，招牌上的字可能写反或编出不存在的字。1K 下小字容易糊。
GPT Image 2.5： 可能丢掉小细节（一条包带、一道粉笔下划线），修复老照片时会改衣服，大片纯色区域可能有细小的颗粒。没有 4K，画面比例最宽到 16:9。

常见问题

Nano Banana 2.1 和 GPT Image 2.5 哪个更便宜？

在 zzo.ai 上，Nano Banana 2.1 生成一张 1K 画质的图片要 10 积分（$0.10）。在 zzo.ai 上，GPT Image 2.5 生成一张高画质的图片要 15 积分（$0.15）。不用开会员：买一次积分，两个模型都能用，生成失败自动退回积分。

Nano Banana 和 GPT Image 哪个好？

没有哪个全面更好。我们 18 组同提示词测试里，GPT Image 2.5 在 4 组改图和 1 张海报上更好，Nano Banana 2.1 在 2 组老照片修复上更好，其余打平。CellCog 的 24 条提示词（2026 年 10 月 25 日）是 GPT Image 2.5 赢 9 条、2.1 赢 5 条、10 条打平；Atlas Cloud 的四轮测试则偏向 2.1。改图和抠图选 GPT Image 2.5，修老照片、4K 和超宽横幅选 Nano Banana 2.1。

改图（图生图）用哪个好？

大多数改图选 GPT Image 2.5：去掉东西、清理画面、换季节、加宠物，我们的测试里都是它更好，第三方测试也发现 Nano Banana 2.1 更容易重新裁图、重画画面。修复老照片选 Nano Banana 2.1，两次都是它保住了人脸。在 zzo.ai 上，两个模型一次改图都最多能传 4 张照片。

哪个更能保住我的脸？

多数时候是 GPT Image 2.5，但不是每次都是，而且两个都做不到像素级不变。在提示词里写清楚哪些要保留（脸、五官、头发、表情），一次只改一处，改完和原图对比一下。

哪个能做透明背景的 PNG？

只有 GPT Image 2.5。打开“透明背景”，就能得到带真正透明通道的 PNG。Nano Banana 2.1 不支持透明输出。

哪个写中文更准？

这组对比没有测中文。我们测过一张日文海报，两个模型都写对了。另外，Nano Banana 2.1 在照片里的招牌上容易写出反字或编出不存在的字。中文海报请生成后逐字核对，最好两个模型都试一次。

哪个出图更快？

差不多。CellCog 测得 Nano Banana 2.1 在 2K 下的中位数约 31 秒，GPT Image 2.5 在高质量下约 29 秒。我们自己生成样片时，Nano Banana 2.1 大多在 15 到 36 秒之间（有一张用了 82 秒），GPT Image 2.5 在 19 到 32 秒之间。

Nano Banana 2.1 和 Nano Banana Pro 是什么关系？

都是谷歌的生图模型。谷歌把 Nano Banana 2.1 定位为 Nano Banana Pro（Gemini 3 Pro Image）更高效的版本。按谷歌自己 2026 年 10 月公布的对比评分，开启思考的 Nano Banana 2.1 每一项都高于 Pro，但这是谷歌自己的评测，不是第三方的。zzo.ai 没有提供 Nano Banana Pro。

GPT Image 2.5 的 Flare 和 Sunburst 选哪个？

两个在 zzo.ai 上价格一样。Flare 是 OpenAI 的小模型，速度快；Sunburst 是大模型，主打画质。第三方测试里两者结果几乎一样，Sunburst 更慢。先用 Flare，细节还不满意时再换 Sunburst 出最终图。

一个账号能两个都用吗？

能。一个账号、同一份积分，两个模型都能用。同一条提示词各跑一次，留下你更喜欢的那张。

Nano Banana 2.1 和 GPT Image 2.5，哪个更适合你？

同一条提示词，两个模型

修复褪色的彩色老照片：Nano Banana 2.1 胜

修复并上色一张撕破的 1948 年老照片：Nano Banana 2.1 胜

换外套、加雨、在窗上写字：打平

去掉画面里的东西：GPT Image 2.5 胜

把另一张照片里的狗加进来：GPT Image 2.5 胜

把乱糟糟的桌面收拾干净：GPT Image 2.5 胜

夏天改成冬天：GPT Image 2.5 胜

人像修图：打平

把 logo 印到产品上：打平

改海报上的日期：打平

文字要一字不差的演出海报：打平

咖啡袋商品图：打平

抓拍风格的人像：打平

陶艺工作室里的两个人：打平

电影感剧照：打平

爵士海报，会不会多加字？GPT Image 2.5 胜

灯光展海报：打平

同一张海报改成日文：打平

怎么选