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falgoogle/nano-banana-2.1
google/nano-banana-2.1 is a text to image tool from fal that runs in the background and returns images. Pay as you go from $0.000002294 per token, with one API key.
Try itfrom $0.000002294 / token
Pricing
Up to $0.414433 per image at 1K, $0.433703 at 2K and $0.505968 at 4K, usually less. Billed on tokens used and on num_images, default 1. The final charge comes from usage.
Limits
- Runs
- In the background
- Returns
- image
- Longest queue wait
- 3600s
- Run deadline
- 1800s
- Largest inline input
- 1024 KB
- Largest input file
- 500 MB
- Largest output
- 4768 MB
- Outputs per run
- 16
Input
| Field | Kind | Default | Description |
|---|---|---|---|
prompt required | text | — | The text prompt to generate an image from. |
num_images | number (whole) 1 to 4 | 1 | The number of images to generate. |
seed | number (whole) | — | The seed for the random number generator. |
aspect_ratio | one of auto, 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16, 4:1, 1:4, 8:1, 1:8 | auto | The aspect ratio of the generated image. Supports extreme ratios: 4:1, 1:4, 8:1, 1:8. Use "auto" to let the model decide based on the prompt. |
output_format | one of jpeg, png, webp | png | The format of the generated image. |
safety_tolerance | one of 1, 2, 3, 4, 5, 6 | 4 | The safety tolerance level for content moderation. 1 is the most strict (blocks most content), 6 is the least strict. |
system_prompt | text | Optional system instruction that steers the model's persona and output style across the request. Leave blank to omit; when provided, it is sent as the system instruction to Gemini (or as a system message on OpenAI-compatible providers). | |
resolution | one of 1K, 2K, 4K | 1K | The resolution of the image to generate. |
limit_generations | true or false | true | Experimental parameter to limit the number of generations from each round of prompting to 1. Set to `True` to to disregard any instructions in the prompt regarding the number of images to generate and ignore any intermediate images generated by the model. This may affect generation quality. |
enable_web_search | true or false | false | Enable web search for the image generation task. This will allow the model to use the latest information from the web to generate the image. |
thinking_level | one of minimal, medium, high | medium | How much the model reasons before generating. Higher levels can improve complex compositions and use more thinking tokens. |
Same request in code
curl https://api.spiral.ai/v1/runs \
-H "Authorization: Bearer $SPIRAL_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"provider": "fal",
"model": "google/nano-banana-2.1",
"input": {
"prompt": "An action shot of a black lab swimming in an inground suburban swimming pool. The camera is placed meticulously on the water line, dividing the image in half,…"
}
}'