google/nano-banana/pro/text-to-image
Generate stunning 4K images from text or references with multilingual text, consistent characters, and studio-level controls for lighting, focus, and creative storytelling precision.
Table of contents
1. Get started
Use RunComfy's API to run google/nano-banana/pro/text-to-image. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/google/nano-banana/pro/text-to-image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A pair of mannequin legs dressed in sparkling glitter socks protrudes boldly from a voluminous mountain of cotton candy, its delicate, spun sugar texture softly aglow under a focused studio spotlight. Wisps of ethereal fog swirl gently around the scene, diffusing the bright, cool light and lending a dreamlike haze that contrasts with the sharp shine on the socks' glistening threads. The smooth, featureless plastic of the legs reflects the light with subtle sheen, emphasizing their artificial stillness amid the sweet, fluffy chaos surrounding them. The composition centers tightly on this surreal juxtaposition, capturing the fine details of the glitter's shimmer and the airy cotton candy's spun texture in crisp, tactile clarity, bathed in cool white and pale pink hues that meld into a softly blurred background."
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/google/nano-banana/pro/text-to-image \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"prompt": "A pair of mannequin legs dressed in sparkling glitter socks protrudes boldly from a voluminous mountain of cotton candy, its delicate, spun sugar texture softly aglow under a focused studio spotlight. Wisps of ethereal fog swirl gently around the scene, diffusing the bright, cool light and lending a dreamlike haze that contrasts with the sharp shine on the socks' glistening threads. The smooth, featureless plastic of the legs reflects the light with subtle sheen, emphasizing their artificial stillness amid the sweet, fluffy chaos surrounding them. The composition centers tightly on this surreal juxtaposition, capturing the fine details of the glitter's shimmer and the airy cotton candy's spun texture in crisp, tactile clarity, bathed in cool white and pale pink hues that meld into a softly blurred background."
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"prompt"
],
"properties": {
"prompt": {
"title": "Prompt",
"description": "",
"type": "string",
"default": "A pair of mannequin legs dressed in sparkling glitter socks protrudes boldly from a voluminous mountain of cotton candy, its delicate, spun sugar texture softly aglow under a focused studio spotlight. Wisps of ethereal fog swirl gently around the scene, diffusing the bright, cool light and lending a dreamlike haze that contrasts with the sharp shine on the socks' glistening threads. The smooth, featureless plastic of the legs reflects the light with subtle sheen, emphasizing their artificial stillness amid the sweet, fluffy chaos surrounding them. The composition centers tightly on this surreal juxtaposition, capturing the fine details of the glitter's shimmer and the airy cotton candy's spun texture in crisp, tactile clarity, bathed in cool white and pale pink hues that meld into a softly blurred background."
},
"aspect_ratio": {
"title": "Aspect Ratio (W:H)",
"description": "The aspect ratio of the generated image.",
"type": "string",
"enum": [
"21:9",
"16:9",
"3:2",
"4:3",
"5:4",
"1:1",
"4:5",
"3:4",
"2:3",
"9:16"
],
"default": "16:9"
},
"resolution": {
"title": "Resolution",
"description": "The resolution of the generated image.",
"type": "string",
"enum": [
"1K",
"2K",
"4K"
],
"default": "1K"
},
"output_format": {
"title": "Output Format",
"description": "The format of the generated image. Default value: \"png\"",
"type": "string",
"enum": [
"jpeg",
"png",
"webp"
],
"default": "png"
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}