Google · Image Edit

Gemini 3.1 Flash Image Edit Image

Gemini 3.1 Flash Image Edit Image is available in the Business API catalog.

image → image

google/gemini-3.1-flash-image/image-to-image

Capabilities

Best for

•Concept art and mood boards
•Product and marketing visuals
•Batch generation at scale

Not for

•Exact text rendering at small sizes
•Precise brand-logo reproduction
•Vector output

Authentication

api key header

The Pika API uses API keys to authenticate requests. Send your key in the X-API-Keyheader. Your API key is a secret. Don't expose it in browsers or other client-side code. Instead, call the API from your server. The signed-in playground uses a portal session and never sends your API key.

header

X-API-Key: YOUR_API_KEY

Endpoint

asynchronous · poll for the result

POSThttps://089e99349ace.pikalabs.app/v1/media/google/gemini-3.1-flash-image/image-to-imagegenerate endpoint

GEThttps://089e99349ace.pikalabs.app/v1/media/jobs/{request_id}poll until completed

GEThttps://089e99349ace.pikalabs.app/v1/media/jobs/{request_id}/contentget the result URL

Reference Uploads

media inputs

Media inputs accept any public URL. To use a local file, POST its content_type and size_bytes to /v1/media/uploads, PUT the file to the returned upload_url, then pass the url.

upload

# 1. Request a presigned upload URL. Send the file's content
#    type and its exact size in bytes.
curl -X POST https://089e99349ace.pikalabs.app/v1/media/uploads \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"content_type": "image/png", "size_bytes": 12345}'

# The response returns two URLs:
#   upload_url: a temporary URL to upload the file to. Expires in 5 minutes.
#   url:        the permanent Pika URL. Pass it to the model as the input.
# {
#   "upload_url": "https://upload.r2.pika.art/...?X-Amz-Signature=...",
#   "url": "https://cdn.pika.art/v2/media/uploads/org_abc/9f8e7d.png"
# }

# 2. Upload the file to upload_url, then pass url to the model.
curl -X PUT "<upload_url>" \
  -H "Content-Type: image/png" \
  --data-binary @input.png

Generate

POST /v1/media/google/gemini-3.1-flash-image/image-to-image

Request

curl -X POST https://089e99349ace.pikalabs.app/v1/media/google/gemini-3.1-flash-image/image-to-image \
  -H "X-API-Key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "prompt": "subtle movements, wind blowing through their fur.",
  "num_images": 1,
  "aspect_ratio": "1:1",
  "output_format": "png",
  "resolution": "1K",
  "image_urls": [
    "https://cdn.pika.art/v1/files/0a994bfa359c247de691835a907460a51c2c12505c1b96ff334dcb9163175827/image_0.png"
  ]
}'

Response

{
  "id": "media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0",
  "status": "queued"
}

Request body

promptstringrequired

Text prompt describing the image to generate.

num_imagesinteger1default: 1

Number of images to generate.

aspect_ratioenumdefault: 1:1

Output aspect ratio.

output_formatstringfixed: png

Image file format of the output.

resolutionenumdefault: 1K

Output resolution.

image_urlsstring[]required

URLs of the source images to edit.

Accepted values

aspect_ratio
resolution

Input modes

Image urlsimage_urls

Use a public URL directly, or POST { content_type, size_bytes } to /v1/media/uploads, PUT the image to the returned upload_url, then pass the url.

Returns

Returns a job object with status , not the final output. Store the id from the response and poll the job until it completes.

Poll status

GET /v1/media/jobs/{request_id}

Request

curl https://089e99349ace.pikalabs.app/v1/media/jobs/{request_id} \
  -H "X-API-Key: YOUR_API_KEY"

Response

{
  "id": "media_8f3a2c91-5b7d-4e0a-9c26-31d4f2a8e6b0",
  "status": "running"
}

Poll the job by id until it reaches a terminal state: completed or failed.

The job object

idstring

Unique identifier for the job.

statusenum

The status of the job.One of:

object

The generation output. Present once the job completes.

errorstring

If the job failed, the reason for the failure.

Get result

GET /v1/media/jobs/{request_id}/content

Request

curl https://089e99349ace.pikalabs.app/v1/media/jobs/{request_id}/content \
  -H "X-API-Key: YOUR_API_KEY"

Response

{
  "url": "https://089e99349ace.pikalabs.app/v1/files/img_8f3a2c91.png"
}

Once the job completes, fetch a download URL for the generated media.

Returns

urlstring

Download URL for the generated file.

Errors

shared across calls

Errors use conventional HTTP status codes with a JSON body of the shape {"message": "..."}. The one exception is validation: a request body that fails validation returns 422 with a plain-text body.

Status	When	Body
401 Unauthorized	The API key is missing or invalid.	{"message":"Invalid API key"}
403 Forbidden	The key is not active, or the org balance cannot cover the request.	{"message":"Insufficient org balance"}
404 Not Found	No job with that id exists in your org.	{"message":"media job not found"}
409 Conflict	The result was requested before the job completed, or an Idempotency-Key header was reused with a different body.	{"message":"media job is not ready"}
422 Unprocessable Entity	The request body failed validation: an invalid enum value, a missing required field, a wrong type, or malformed JSON. Returned as plain text, not JSON. A schema-valid parameter combination that cannot be priced returns the same status with a JSON message.	Unprocessable entity
429 Too Many Requests	Org limit reached: requests per minute or day, or concurrent jobs. Check the Retry-After header.	{"message":"rate limit exceeded: rpm"}
503 Service Unavailable	The model rail or a backend dependency is temporarily unavailable. Retry with backoff.	{"message":"media dispatch unavailable"}

Pricing

only successful runs are charged

Tier	Price
0.5k	$0.045 / image
1k	$0.067 / image
2k	$0.10 / image
4k	$0.15 / image

Per-model pricing

Transparent, usage-based rates for every Google model.

Model	Type
Veo 3.1 Lite	Image to Video	from $0.03 / sec
Nano Banana 2 Lite	Image to Image	$0.034 / image
Nano Banana 2 Lite	Text to Image	$0.034 / image
Nano Banana 2Current	Image to Image	from $0.045 / image
Nano Banana 2	Text to Image	from $0.045 / image
Lyria 2	Music	$0.06 / request
Veo 3.1 Fast	Text to Video	from $0.08 / sec
Veo 3.1 Fast Video Extension	Video Extension	from $0.1 / sec
Nano Banana Pro	Image to Image	from $0.134 / image
Nano Banana Pro	Text to Image	from $0.134 / image
Veo 3.1	Text to Video	from $0.2 / sec
Veo 3.1 Video Extension	Video Extension	from $0.2 / sec
Gemini 3.1 Pro		$2 / $12 per 1M tok
Gemini Omni Flash Image To Video	Image to Video	$1.575 / $9.45 per 1M tok
Gemini Omni Flash Reference To Video	Reference to Video	$1.575 / $9.45 per 1M tok
Gemini Omni Flash Text To Video	Text to Video	$1.575 / $9.45 per 1M tok
Gemini Omni Flash Video To Video	Video to Video	$1.575 / $9.45 per 1M tok

Veo 3.1 Lite

from $0.03 / sec

Image to Video

Nano Banana 2 Lite

$0.034 / image

Image to Image

Nano Banana 2 Lite

$0.034 / image

Text to Image

Nano Banana 2

Current

from $0.045 / image

Image to Image

Nano Banana 2

from $0.045 / image

Text to Image

Lyria 2

$0.06 / request

Music

Veo 3.1 Fast

from $0.08 / sec

Text to Video

Veo 3.1 Fast Video Extension

from $0.1 / sec

Video Extension

Nano Banana Pro

from $0.134 / image

Image to Image

Nano Banana Pro

from $0.134 / image

Text to Image

Veo 3.1

from $0.2 / sec

Text to Video

Veo 3.1 Video Extension

from $0.2 / sec

Video Extension

Gemini 3.1 Pro

$2 / $12 per 1M tok

Gemini Omni Flash Image To Video

$1.575 / $9.45 per 1M tok

Image to Video

Gemini Omni Flash Reference To Video

$1.575 / $9.45 per 1M tok

Reference to Video

Gemini Omni Flash Text To Video

$1.575 / $9.45 per 1M tok

Text to Video

Gemini Omni Flash Video To Video

$1.575 / $9.45 per 1M tok

Video to Video