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://api.dev.pika.art/v1/media/google/gemini-3.1-flash-image/image-to-imagegenerate endpoint
GEThttps://api.dev.pika.art/v1/media/jobs/{request_id}poll until completed
GEThttps://api.dev.pika.art/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://api.dev.pika.art/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://api.dev.pika.art/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": "Combine the two references: place the woman in the sculptural red vinyl trench from the first image inside the pistachio gondola cabin from the second image, seated composed on the wooden bench before the big front window with the foggy peaks and cables behind her — the red vinyl the only saturated mass in the pale cabin, its sheen catching the window light. Keep her identity and the coat's sculpted collar exactly. Slightly desaturated, low contrast, fine film grain, matte. No other people, no text.",
  "num_images": 1,
  "aspect_ratio": "3:4",
  "output_format": "png",
  "resolution": "1K",
  "image_urls": [
    "https://msaocnoosm1a4.pika.art/v2/media/uploads/ff78f2c4-2c28-4245-8264-697530fb255f/1e79d554bda74de8b7065d75227ed74a.jpg"
  ]
}'

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://api.dev.pika.art/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://api.dev.pika.art/v1/media/jobs/{request_id}/content \
  -H "X-API-Key: YOUR_API_KEY"

Response

{
  "url": "https://api.dev.pika.art/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.

StatusWhenBody
401 UnauthorizedThe API key is missing or invalid.{"message":"Invalid API key"}
403 ForbiddenThe key is not active, or the org balance cannot cover the request.{"message":"Insufficient org balance"}
404 Not FoundNo job with that id exists in your org.{"message":"media job not found"}
409 ConflictThe 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 EntityThe 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 RequestsOrg limit reached: requests per minute or day, or concurrent jobs. Check the Retry-After header.{"message":"rate limit exceeded: rpm"}
503 Service UnavailableThe model rail or a backend dependency is temporarily unavailable. Retry with backoff.{"message":"media dispatch unavailable"}

Pricing

only successful runs are charged

Pricing for this model is shared during onboarding.

Per-model pricing

Transparent, usage-based rates for every Google model.

Veo 3.1 Lite

from $0.024 / sec
Image to Video

Lyria 3

$0.032 / request
Text to Audio

Lyria 2

$0.048 / request
Music

Lyria 3 Pro

$0.064 / request
Text to Audio

Veo 3.1 Fast

from $0.064 / sec
Text to Video

Veo 3.1 Fast Video Extension

from $0.064 / sec
Video Extension

Veo 3.1

from $0.16 / sec
Text to Video

Veo 3.1 Video Extension

from $0.16 / sec
Video Extension

Gemini 3.1 Pro

$1.6 / $9.6 per 1M tok

Gemini Omni Flash Image To Video

$1.2 / $7.2 per 1M tok
Image to Video

Gemini Omni Flash Reference To Video

$1.2 / $7.2 per 1M tok
Reference to Video

Gemini Omni Flash Text To Video

$1.2 / $7.2 per 1M tok
Text to Video

Gemini Omni Flash Video To Video

$1.2 / $7.2 per 1M tok
Video to Video

Nano Banana 2

Current
$0.5 / $3 per 1M tok
Image to Image

Nano Banana 2

$0.5 / $3 per 1M tok
Text to Image

Nano Banana 2 Lite

$0.25 / $1.5 per 1M tok
Image to Image

Nano Banana 2 Lite

$0.25 / $1.5 per 1M tok
Text to Image

Nano Banana Pro

$2 / $12 per 1M tok
Image to Image

Nano Banana Pro

$2 / $12 per 1M tok
Text to Image