Test Nano Banana and GPT Image 2 online
Compare the same prompt, reference images, and available sizes before choosing a production route.
Free to open the playgroundGeneration requires an API keyBilling and limits follow your account
Online AI image model test
Compare Nano Banana and GPT Image 2 image routes online
Use the same prompt and reference image to compare model behavior, available sizes, and downloaded files. The playground is free to open, but model calls are not automatically free: generation needs a currently valid API key, while pricing, free credits, and concurrency limits follow the live account and selected route.
Compare the same prompt
Keep the prompt, reference image, and acceptance checks fixed across Nano Banana and GPT Image 2 routes.
Separate access from usage
Opening the playground is free; generation still depends on an API key, account balance, and the current route rules.
Verify 4K and concurrency
Check downloaded pixel dimensions, then measure success rate, P95, 429s, retries, and actual charges before scaling.
Image model route comparison
The amounts below are estimates for the provider routes currently shown on this page; they are neither fixed rates nor a market-wide lowest-price claim. Before generation or production load, confirm live balance, pricing, free credits, model access, concurrency, and failure billing in the account and route rules.
Nano Banana
gemini-2.5-flash-imageResolution1KBest forLow-cost prompt tests, rough drafts, bulk direction checks
Nano Banana Pro
Defaultgemini-3-pro-imageResolution1K / 2K / 4KBest forText rendering, product images, complex scenes, 4K validation
Nano Banana 2
gemini-3.1-flash-imageResolution1K / 2K / 4KBest forValue-focused tests between low-cost and pro routes
GPT Image 2 VIP
gpt-image-2-vipResolution30 sizesBest forOpenAI image VIP route with 30 size choices
Model
API model ID
Price
Resolution
Best for
Nano Banana
gemini-2.5-flash-image$0.02
1K
Low-cost prompt tests, rough drafts, bulk direction checks
Nano Banana ProDefault
gemini-3-pro-image$0.09
1K / 2K / 4K
Text rendering, product images, complex scenes, 4K validation
Nano Banana 2
gemini-3.1-flash-image$0.055
1K / 2K / 4K
Value-focused tests between low-cost and pro routes
GPT Image 2 VIP
gpt-image-2-vip$0.03
30 sizes
OpenAI image VIP route with 30 size choices
How to choose
1Keep the prompt, reference image, and acceptance criteria the same when comparing all four image routes.
2The playground is free to open; whether a model call has free credits depends on the current API key, account, and selected route.
3A low-cost label compares only the estimates shown here, not the whole market; include success rate, rework, and failure billing in the decision.
4For 4K work, select a size the active model actually exposes and verify the downloaded pixel dimensions instead of relying on prompt wording or a badge.
5For high concurrency, start with a workload-shaped sample and raise traffic only after checking P95, 429s, retries, and actual charges.
Get an image API key
YingTu helps compare whether an image route fits the job. Before generation or production use, run the same prompt set with a currently valid laozhang.ai API key and verify live pricing, free credits, model access, concurrency behavior, call logs, orders, and charges in the account.
Image testing questions
Can I try Nano Banana or GPT Image 2 for free?
You can open the YingTu playground and inspect its models and controls for free, but generating an image requires a currently valid API key. Any free credits, trial calls, or account benefits depend on the selected route and its live account rules.
Are the low-cost routes shown here the cheapest on the market?
No. The table compares estimates for the routes currently displayed on this page, not every market option. Check live account charges, success rate, failure billing, rework cost, and support scope before choosing.
Does selecting 4K guarantee a 4K file?
First confirm that the selected model and route currently expose the requested size, then inspect the downloaded pixel dimensions. A “4K” phrase in the prompt or a UI label is not a substitute for checking the final file.
What is the image API concurrency limit?
There is no single limit for every account and route. Concurrency depends on the active token, account status, model, and provider rules, so test gradually and record P95, 429s, retries, and actual charges before scaling.
Is GPT Image 2 VIP the same contract as the official GPT Image 2 API?
No. GPT Image 2 VIP is the provider route displayed on this page, so its parameters, pricing, limits, logs, and support belong to that route. Verify official GPT Image 2 API billing and quotas separately in the official account.