Nano Banana 2 vs Nano Banana Pro
Both are Google image models, but they are tuned for different workloads. Google positions Nano Banana 2 (Gemini 3.1 Flash Image) as the efficient general-purpose option and Nano Banana Pro (Gemini 3 Pro Image) for complex instructions and professional asset production. Both current API models support up to 4K output. Open the generator to test the same prompt with each available model.
提示词开头: Ecommerce campaign hero of one banana-yellow wireless speaker on charcoal stone, exact product color, realistic softbox reflections, amber rim light, negative space on the right for the headline "BUILD BRIGHTER", clean premium layout, 16:9, 2K
Nano Banana 2 vs Nano Banana Pro
多模型生成，无需 API 密钥，可领取免费额度。
Comparison reviewed: 2026-08-22
Model names and documented output options were checked against current Google documentation. Service cost and latency are intentionally not frozen into the article.
生成前先看已核验事实
以下信息来自当前产品配置与所链接的一手文档。实际输出质量仍会受提示词与输入图像影响。
- Nano Banana 2
- Gemini 3.1 Flash Image
- Nano Banana Pro
- Gemini 3 Pro Image
- Documented ceiling
- Both up to 4K
- Universal winner
- None
Google positions it as the efficient general-purpose image model for high-volume workflows.
Google positions it for complex instructions and professional asset production.
Nano Banana 2 also documents a 0.5K option. This service currently shows its own supported resolution choices and credit estimate.
The right choice depends on prompt adherence, reference fidelity, text, consistency, latency, and cost for your actual brief.
The short answer
Start with Nano Banana 2 for everyday generation and efficient iteration. Test Pro when the same controlled brief repeatedly fails on complex constraints, references, layout, or production polish.
- Use one fixed prompt and reference set before switching models
- Generate several results; do not compare one lucky output with one failure
- Check the live selector for availability, credits, resolution, and image count
When to use Nano Banana 2
Nano Banana 2 is the practical first test when the brief is clear and iteration efficiency matters.
- Fast prompt iteration and concept exploration
- Social posts, avatars, and quick drafts
- Repeated drafts where queue time and credit use matter
- A first pass before testing whether Pro solves a specific failure
When to use Nano Banana Pro
Nano Banana Pro is the escalation path for briefs with more simultaneous constraints. That positioning does not guarantee a better result on every prompt.
- Text-heavy visuals, posters, and infographics
- Premium 4K brand and product hero images
- Reference-guided character, product, or brand continuity
- Higher-stakes final assets where polish beats speed
Nano Banana 2 vs Pro side by side
This table separates documented positioning from decisions you still need to test in the live product.
| Decision factor | Nano Banana 2 | Nano Banana Pro |
|---|---|---|
| Google model family | Gemini 3.1 Flash Image | Gemini 3 Pro Image |
| Official positioning | Efficient, general-purpose, high-volume image work | Complex instructions and professional asset production |
| Documented output sizes | 0.5K, 1K, 2K, and 4K | 1K, 2K, and 4K |
| Best first use | Drafts, ideation, social assets, and ordinary edits | Constraint-heavy layouts, references, text intent, and final assets |
| Speed and service cost | Check the live estimate; no fixed latency promised | Check the live estimate; no fixed latency promised |
| How to decide | Use if it meets the brief reliably enough | Use only if it fixes a measured failure or adds needed control |
Run a same-prompt comparison you can defend
A fair comparison fixes every controllable input and records all outputs. It does not infer quality from model names or marketing labels.
- 1Create one real brief with five scored requirements and, if needed, one fixed set of licensed reference images.
- 2Confirm both models are available, then use the same aspect ratio, resolution, image count, and prompt.
- 3Generate at least three independent results per model and retain failures.
- 4Blind-review prompt adherence, reference fidelity, geometry, text, and publication readiness.
- 5Record generation time and credits from your own run; choose by median performance and workflow cost.
This page does not claim a winner from an unrun test. We have not published controlled output scores, latency measurements, or cost snapshots here; the hero image is illustrative.
一手资料
- Gemini API image generation documentation — Google AI for Developers
- Gemini 3.1 Flash Image model card — Google AI for Developers
常见问题
What is the main difference between Nano Banana 2 and Nano Banana Pro?
Google positions Nano Banana 2, built on Gemini 3.1 Flash Image, as its efficient general-purpose image model. Nano Banana Pro, built on Gemini 3 Pro Image, is designed for complex instructions and professional asset production. Both current API models support output up to 4K.
Is Nano Banana 2 better than Nano Banana Pro?
Neither is universally better. Start with Nano Banana 2 for an efficient general workflow and test Pro when the brief needs complex instructions, multiple references, brand consistency, or precise layout control.
Which is faster?
Google positions Nano Banana 2 for speed and high-volume use cases, but end-to-end time on this service also depends on provider queues, resolution, image count, and the prompt. We do not promise a fixed latency.
Which is cheaper?
The answer depends on the current service credit estimate and how many acceptable outputs your brief requires. Check the generator and pricing page, then compare total credits spent per usable result.
Can I try both for free?
A limited guest trial and daily credits may let you test available models. Open the generator, confirm current model availability and credit cost, then run the same prompt through each model you want to compare.
开始使用 Banananano AI 生成图像
使用每日免费额度测试模型、保存提示词片段，并建立可复用的创作工作流。