Nano Banana 2.1 API: Model ID, Pricing and API Setup

What is the official Nano Banana 2.1 API ID?

The official API ID is gemini-nano-banana-2.1. Nano Banana 2.1 is the product name, while nano-banana-2.1 is a common search spelling. Use the full gemini- model ID in API requests.

Google’s Gemini API model documentation and image-generation guide now list Nano Banana 2.1 as an available Gemini API generative media model. Google positions it as an update to Nano Banana 2 with improved visual quality, text rendering, multi-turn character consistency and search-grounded generation.

How is Nano Banana 2.1 related to Nano Banana 2?

Google now documents them as two public models:

• Nano Banana 2.1: gemini-nano-banana-2.1, the updated high-efficiency image generation and editing model.
• Nano Banana 2: gemini-3.1-flash-image, the previous-generation high-efficiency image model that remains useful for compatibility testing and migration comparisons.

Nano Banana 2.1 is therefore no longer just an unconfirmed product label, and it is not simply an alias for gemini-3.1-flash-image. Keep the model ID configurable and choose based on measured quality, latency, capabilities and price.

Which model should you use today?

For a new project, start by testing gemini-nano-banana-2.1. It is Google’s current high-efficiency workhorse and supports 1K, 2K and 4K output. The October 8, 2026 check found 3 active APIMaster routes, starting at $0.02184 per 1K image, up to ~35% off. Use the model card for final pricing.

If you need to compare previous-generation behavior, test gemini-3.1-flash-image as well. APIMaster had four active routes in this check, with the lowest 1K price at $0.0134; route quality, latency and availability can differ, so do not choose on price alone.

gemini-2.5-flash-image still has one active route, but Google has deprecated it and plans to retire it on March 15, 2027 on Vertex. It can work while a route remains active, but it should not be the long-term default for a new project.

How to call the Nano Banana 2.1 API

Create an APIMaster account, create a key in the API key console, and use the confirmed model ID:

curl "https://apimaster.ai/v1/images/generations" \
  -H "Authorization: Bearer $APIMASTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-nano-banana-2.1",
    "prompt": "A clean studio product photograph of a yellow ceramic teapot on a blue table.",
    "size": "1:1",
    "resolution": "1K",
    "n": 1
  }'

Open the Nano Banana 2.1 model card before sending production traffic to check the current routes and resolution pricing. Do not send nano-banana-2.1 as the request model value.

Migration checklist

1. Use the official ID. Replace product labels or the unprefixed spelling with gemini-nano-banana-2.1.
2. Choose the resolution. 1K, 2K and 4K have different prices.
3. Keep a fallback. During migration, retain gemini-3.1-flash-image to compare quality, editing, latency and cost.
4. Check the live card. Route supply and prices change, so verify the marketplace before production traffic.

FAQ

Has Nano Banana 2.1 actually launched?

Yes. Google’s Gemini API documentation now lists Nano Banana 2.1 and its public model ID, gemini-nano-banana-2.1. This is different from the earlier stage when only Gemini and Flow product-name clues were public.

Is nano-banana-2.1 the same as gemini-nano-banana-2.1?

No. Use the complete gemini-nano-banana-2.1 value in API requests. Nano Banana 2.1 is the product name, and nano-banana-2.1 is a common search spelling, not the confirmed request ID.

How much does Nano Banana 2.1 cost on APIMaster?

The October 8, 2026 live check found 3 active routes, with the lowest prices at $0.02184 per 1K image, $0.03276 per 2K image and $0.04914 per 4K image, up to ~35% off the public reference prices. See the live model card because prices can change.

Which resolutions does Nano Banana 2.1 support?

Google documents 1K, 2K and 4K image output for Nano Banana 2.1. Confirm the exact request parameters and route capabilities in the API documentation and model card.

Should a new project use Nano Banana 2.1 or Nano Banana 2?

Start with gemini-nano-banana-2.1 for a new project. Keep gemini-3.1-flash-image as a compatibility comparison or fallback when you already have Nano Banana 2 traffic.

Sources and verification date

• Google Gemini API model documentation — official model name and API ID.
• Google image-generation guide — model capabilities and image workflow.
• Google Gemini API pricing — reference pricing and resolution tiers.
• Google Cloud Gemini model catalog — Vertex model status.
• APIMaster live marketplace catalogue, checked October 8, 2026. Route pricing and availability can change after publication.

Start calling Nano Banana 2.1 today

Nano Banana 2.1 now has an official API ID: gemini-nano-banana-2.1, with 3 active APIMaster routes checked on October 8, 2026, starting at $0.02184 per 1K image, up to ~35% off. Create an APIMaster account, create a key in the console, point your client at https://apimaster.ai/v1, and start with the Nano Banana 2.1 model card.