How to Use the Nano Banana 2.1 Text to Image API: text to image integration guide (2026)

Nano Banana 2.1 Text to Image is a text to image model by Google: Google text-to-image generation with 1K–4K output, configurable thinking and token-based billing. On NamiFusion you can try it in the playground (exact quote shown before you submit), then call it through one unified REST API — about $0.0336 per typical run.

TL;DR

· Task type: text to image, provided by Google

· Pricing: about $0.0336 per typical run ($1 = 100 credits), pay-as-you-go

· Getting started: playground (exact quote before submit) → create an API key → one POST request

· Tunable parameters: 6 (see the table below)

· No platform watermark; commercial use allowed (per the Terms of Service)

What can you build with Nano Banana 2.1 Text to Image?

Social media visuals and covers: batch-generate on-theme images and schedule them straight away.

E-commerce and ad creatives: product scenes, banner backgrounds, and multi-variant visuals for A/B tests.

Concept art and ideation: characters, environments and style boards, iterated cheaply and fast.

Pipeline chaining: outputs feed directly into image-to-video or face swap as source material.

How do you call this API?

1. Sign up on NamiFusion and create a key on the API Keys page (signup bonus credits can only be used on selected models).
2. Submit a task with the cURL example below, passing your key as a Bearer token.
3. Poll the task status with the returned task_uuid and read the output URLs when completed.

# 1) Submit — returns { "task_uuid": "..." }
curl -X POST "https://www.namifusion.com/api/v1/marketplace/run/google/nano-banana-2.1/text-to-image" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "input": {
    "prompt": "A cinematic portrait, dramatic rim light, shallow depth of field",
    "aspect_ratio": "1:1",
    "resolution": "1k",
    "thinking_level": "medium",
    "enable_web_search": false,
    "enable_image_search": false
  }
}'

# 2) Poll until status is "completed", then read the output URLs
curl "https://www.namifusion.com/api/v1/marketplace/run/tasks/TASK_UUID" \
  -H "Authorization: Bearer YOUR_API_KEY"

What parameters does it take?

prompt (Prompt): required

aspect_ratio (Aspect Ratio): optional, default "1:1"

resolution (Resolution): optional, default "1k"

thinking_level (Thinking Level): optional, default "medium"

enable_web_search (Web Search): optional, default false

enable_image_search (Image Search): optional, default false

How do you write prompts for Nano Banana 2.1 Text to Image?

1. Subject first: lead with the actor and action, then add environment, lighting and style ("an astronaut sprinting through a neon street in the rain, cinematic, shallow depth of field").
2. Concrete nouns beat stacked adjectives: "85mm portrait lens, golden-hour backlight" works far better than "very beautiful, ultra high quality".
3. Change one variable per iteration: pin the seed to reproduce a result, tweak a single phrase at a time so you know what actually moved the output.
4. State negatives positively: instead of "no blur", ask for "sharp focus, crisp details".

How much does it cost?

Pay-per-use in credits. About $0.0336 per typical run ($1 = 100 credits); the exact price varies with parameters like resolution or duration, and the playground shows the exact quote before you submit.