OpenAI's GPT Image 2 meets Google's Nano Banana (Gemini 2.5 Flash Image). Same prompts, different results — here's a head-to-head with real outputs.
TL;DR
GPT Image 2 leads on text rendering (~99% glyph accuracy), native reasoning, and editing fidelity. Nano Banana wins on raw cost per image and is tightly integrated with Google's stack. Pick GPT Image 2 if your output contains words; pick Nano Banana for high-volume aesthetic-only generation.
Same Prompt, Side by Side
Real outputs from identical prompts. GPT Image 2 on the left, Nano Banana on the right.
1. Cursive neon sign
A vintage diner storefront at night with a glowing neon sign that reads "OPEN 24 HOURS" in cursive script, 35mm film
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Text test: GPT Image 2 renders the cursive accurately. Nano Banana drops a letter and skews the kerning.
2. Japanese kana
An anime character holding a sign that says "Welcome to Tokyo" in Japanese (ようこそ東京へ)
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
CJK test: GPT Image 2 gets the kana correct. Nano Banana produces glyph-shaped artifacts.
3. Minimalist poster typography
A minimalist product poster with a black coffee cup, the headline "Slow Mornings" and a subline "single origin, hand-poured"
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Layout + typography: both look polished. GPT Image 2's headline is sharper and the subline is fully legible.
4. Edit fidelity
Edit: take the previous image and change the cup to white, keep everything else identical
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Edit fidelity: GPT Image 2 keeps the typography intact. Nano Banana subtly redraws the headline.
5. Chinese marketing poster
A vertical Chinese e-commerce marketing poster for Singles Day. Headline 「双十一狂欢节」, subline 「全场五折 限时24小时」. Red and gold color scheme, gift boxes and ribbons, premium luxury feel.
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Chinese rendering: GPT Image 2 nails every glyph across five separate text blocks — headline, sub-headline, date strip, ribbon callout and the four service badges along the bottom. Nano Banana corrupts the headline to the meaningless 「双十化贝烧节」 and silently switches 「场」 to its traditional form 「場」 — a hard fail for any Chinese commerce asset.
6. iOS app screenshot
A photorealistic iOS 18 mobile login screen mockup. App title "CloudNote" with cloud icon, email and password fields, blue "Sign in" button, "Forgot password? · Create account" link, 9:41 status bar with signal/WiFi/battery icons.
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
UI mockup: GPT Image 2 produces an essentially shippable iOS screen — accurate 9:41 status bar, properly proportioned input fields, and the iOS home-indicator bar at the bottom. Nano Banana stacks two conflicting status bars ("9:41" plus a duplicate "9:4 AM" plus "100%") and drops the home indicator entirely — designers can't drop this into a deck.
7. Design system color palette
A Figma-style color palette page titled "Brand Color Tokens", 8 swatches in a 4×2 grid. Each swatch is labeled with its color name and exact hex code: #1E3A8A, #F59E0B, #10B981, #EF4444, #6366F1, #14B8A6, #EC4899, #64748B.
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Hex code accuracy: GPT Image 2 reproduces all 8 hex codes character-perfect. Nano Banana hallucinates extra characters into 4 of them — #F59E0B becomes #F59NE0B, #10B981 becomes #10B1981, #64748B loses the trailing B. For anything design-system or brand-spec adjacent, that's the difference between a useful artifact and a disposable one.
8. Business infographic
A magazine-style business infographic titled "Q1 Revenue Growth". Four vertical bars labeled Jan/Feb/Mar/Apr with values $2.1M, $2.8M, $3.5M, $4.2M and growth badges +15%, +33%, +25%, +20%. Navy bars on cream, gold accent line.
| GPT Image 2 | Nano Banana |
|---|---|
 |  |
Data visualization: both models get every number and label right. GPT Image 2 adds the missing pieces of a real chart — Y-axis with 0–5M scale, axis label "REVENUE (USD)", and consistent typography. Nano Banana skips the axis entirely and floats the percentage badges off the bars. For a slide deck or a press release graphic, GPT Image 2 is the only one that ships without rework.
Capability Matrix
| GPT Image 2 | Nano Banana | |
|---|---|---|
| Text rendering accuracy | ~99% glyph accuracy | ~85–90%, drops on long strings |
| Multilingual (CJK, Hindi, Bengali) | Yes — native | Latin only, weak on CJK |
| UI / screenshot fidelity | Pixel-faithful — status bars, home indicator, system fonts intact | Structural drift — duplicate status bars, missing chrome elements |
| Spec-text accuracy (hex, code, data labels) | Character-perfect across long strings | Frequent insertions/deletions — #F59E0B → #F59NE0B |
| Native reasoning | Yes (Thinking Mode) | No |
| Edit stability | High — faces and text preserved | Medium — drift on small details |
| Speed (typical) | Under 3 seconds | 1–2 seconds |
| Image price | $0.04 – $0.35 | $0.02 – $0.08 |
| Max resolution | 2048 × 2048 (4K upscale) | 1024 × 1024 |
| Best for | Posters, UI mockups, design-system docs, multilingual, brand work | High-volume aesthetic generation |
When to Choose Which
Choose GPT Image 2 if
- Your image contains text — slogans, headlines, UI copy, signs
- You need Chinese, Japanese, Korean, or other non-Latin scripts
- You're producing UI mockups, app screenshots, or design-system docs (hex codes, tokens, labels)
- You're iterating with edits and need details to stay stable
- You're producing brand or marketing assets where typography matters
Choose Nano Banana if
- You need pure aesthetic output without text
- You're generating at high volume and unit cost matters most
- You're already on Google Cloud / Gemini infrastructure
- Latency under 2 seconds is critical
Our Verdict
If words appear in your image — even one — pick GPT Image 2. The 10–15% gap in text accuracy is the difference between a usable asset and a redo. For aesthetic-only generation at scale, Nano Banana's cost advantage compounds. We use GPT Image 2 for everything that ships to users, and Nano Banana for moodboards and rough drafts.
Try It Yourself
Run any prompt from the comparisons above on imagesv2.ai. New users get free credits — no credit card required.