Gemini 2.5 Flash Image

IMAGEFeaturedgoogle-gemini-2-5-flash-image

Gemini 2.5 Flash Image leverages the advanced multimodal reasoning of Google’s Gemini architecture to power next-generation image synthesis. As a ‘Flash’ model, it is optimized for extremely fast performance, making it ideal for real-time and conversational AI applications. For the AI art community, this model excels at interpreting complex, multi-step prompts and can generate contextually rich images that align deeply with the user’s creative vision.

POST

/v2/workspaces/{workspace_id}/base-models/google-gemini-2-5-flash-image/inferences

curl --request POST \
  --url https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "prompt": "a knight standing in a snowy forest",
  "aspect_ratio": "SQUARE_1K",
  "transparency": false,
  "guidance_file_init_image": [
    {
      "url": "<file_url>"
    }
  ],
  "guidance_file_reference_image": [
    {
      "url": "<file_url>"
    }
  ]
}'

import requests

url = "https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences"

payload = {
    "prompt": "a knight standing in a snowy forest",
    "aspect_ratio": "SQUARE_1K",
    "transparency": False,
    "guidance_file_init_image": [{ "url": "<file_url>" }],
    "guidance_file_reference_image": [{ "url": "<file_url>" }]
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())

const url = 'https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences';
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: '{"prompt":"a knight standing in a snowy forest","aspect_ratio":"SQUARE_1K","transparency":false,"guidance_file_init_image":[{"url":"<file_url>"}],"guidance_file_reference_image":[{"url":"<file_url>"}]}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}

package main

import (
  "fmt"
  "strings"
  "net/http"
  "io"
)

func main() {

  url := "https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences"

  payload := strings.NewReader("{\n  \"prompt\": \"a knight standing in a snowy forest\",\n  \"aspect_ratio\": \"SQUARE_1K\",\n  \"transparency\": false,\n  \"guidance_file_init_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ],\n  \"guidance_file_reference_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ]\n}")

  req, _ := http.NewRequest("POST", url, payload)

  req.Header.Add("Authorization", "Bearer <token>")
  req.Header.Add("Content-Type", "application/json")

  res, _ := http.DefaultClient.Do(req)

  defer res.Body.Close()
  body, _ := io.ReadAll(res.Body)

  fmt.Println(res)
  fmt.Println(string(body))

}

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'prompt' => 'a knight standing in a snowy forest',
    'aspect_ratio' => 'SQUARE_1K',
    'transparency' => null,
    'guidance_file_init_image' => [
        [
                'url' => '<file_url>'
        ]
    ],
    'guidance_file_reference_image' => [
        [
                'url' => '<file_url>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

OkHttpClient client = new OkHttpClient();

MediaType mediaType = MediaType.parse("application/json");
RequestBody body = RequestBody.create(mediaType, "{\n  \"prompt\": \"a knight standing in a snowy forest\",\n  \"aspect_ratio\": \"SQUARE_1K\",\n  \"transparency\": false,\n  \"guidance_file_init_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ],\n  \"guidance_file_reference_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ]\n}");
Request request = new Request.Builder()
  .url("https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences")
  .post(body)
  .addHeader("Authorization", "Bearer <token>")
  .addHeader("Content-Type", "application/json")
  .build();

Response response = client.newCall(request).execute();

require 'uri'
require 'net/http'

url = URI("https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"prompt\": \"a knight standing in a snowy forest\",\n  \"aspect_ratio\": \"SQUARE_1K\",\n  \"transparency\": false,\n  \"guidance_file_init_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ],\n  \"guidance_file_reference_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

var client = new RestClient("https://api.app.layer.ai/api/v2/workspaces/:workspace_id/base-models/google-gemini-2-5-flash-image/inferences");
var request = new RestRequest("", Method.Post);
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{\n  \"prompt\": \"a knight standing in a snowy forest\",\n  \"aspect_ratio\": \"SQUARE_1K\",\n  \"transparency\": false,\n  \"guidance_file_init_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ],\n  \"guidance_file_reference_image\": [\n    {\n      \"url\": \"<file_url>\"\n    }\n  ]\n}", ParameterType.RequestBody);
var response = client.Execute(request);

Authorizations

bearerAuth
oauth2

Parameters

Path Parameters

workspace_id

required

Workspace Id

Id of the workspace that owns the resource.

string format: uuid

Id of the workspace that owns the resource.

Query Parameters

session_name

Session Name

Organize this run under a named session. A new session is created if none matches.

string

nullable

Organize this run under a named session. A new session is created if none matches.

Header Parameters

Idempotency-Key

string

<= 255 characters

Opaque key making a retry of this request return the first result. A 2xx response is replayed for 24 hours with Idempotent-Replayed: true. A 4xx releases the key. A 5xx, or a request still running, holds the key for 120 seconds, during which a retry gets 409; after that a retry executes again. The key covers the method, path, query, and byte-identical body it was first used with; reusing it for a different request is rejected with 422. Protection is best effort: if the key store is unavailable, or a record is lost early, a retry can execute again even after an earlier 409. See the Idempotency section of the API description.

Request Body^required

application/json

Gemini 2.5 Flash Image

object

prompt

required

Prompt

Describe what to generate, or the change to make.

string

<= 50000 characters

aspect_ratio

Aspect ratio

The shape and size of the output.

string

default: SQUARE_1K

Allowed values: SQUARE_1K LANDSCAPE_5_4_1K PORTRAIT_4_5_1K LANDSCAPE_3_2_1K PORTRAIT_2_3_1K LANDSCAPE_4_3_1K PORTRAIT_3_4_1K LANDSCAPE_16_9_1K PORTRAIT_9_16_1K LANDSCAPE_21_9_1K

seed

Seed

The starting point for the model’s randomness. The same seed and settings give the same result.

Advanced field.

integer

nullable

transparency

Transparent background

Output the subject alone, with no backdrop behind it.

boolean

guidance_file_init_image

Source image

The image to modify

Array<object>

InferenceFormFileRef

A single guidance/reference file supplied to a reference_image_list field.

The slot’s guidance type is fixed by the field it’s attached to; the caller supplies the file (its URL, or the id of a file it can read) and, where the model supports per-file weighting, a weight.

object

url

required

Url

The file’s URL, or the id of a file in this workspace or a public file.

string

weight

Weight

number

nullable

guidance_file_reference_image

Reference image

Guides the edit

Array<object>

InferenceFormFileRef

A single guidance/reference file supplied to a reference_image_list field.

object

url

required

Url

The file’s URL, or the id of a file in this workspace or a public file.

string

weight

Weight

number

nullable

scene_lighting

Lighting

Where the light comes from, how bright it is and its colour.

object

lights

Lights

Array<object>

OrbitLight

object

required

string

distance

required

Distance

number

>= 0.0001

rotation

required

OrbitLightRotation

object

pitch

required

Pitch

number

>= -90 <= 90

yaw

required

Yaw

number

>= -360 <= 360

properties

required

OrbitLightProperties

object

intensity

required

Intensity

number

color_hex

required

Color Hex

string

/^#([A-Fa-f0-9]{6})$/

cast_shadows

Cast Shadows

boolean

nullable

output_fit

Output canvas

Trim the transparent margin, and place the image on a canvas of a fixed size.

object

trim

Trim

boolean

canvas

OutputFitCanvas

string

default: CONTENT

Allowed values: CONTENT FIXED

width

Width

integer

nullable >= 1 <= 4096

height

Height

integer

nullable >= 1 <= 4096

scale

OutputFitScale

How the drawing goes onto a fixed canvas. The names follow the workflow Resize node’s.

string

default: PLACE

Allowed values: PLACE SHRINK_AND_PAD FIT_AND_PAD FIT_AND_CROP STRETCH

anchor

OutputFitAnchor

The point of the drawing that lands on the same point of the canvas.

BASE is a game tile’s base: its anchor, the bottom centre of the cell it stands on, lands at the bottom centre of the canvas, so tiles of one grid stand on the same point whatever rises above them.

string

default: CENTER

Allowed values: TOP_LEFT TOP_CENTER TOP_RIGHT CENTER_LEFT CENTER CENTER_RIGHT BOTTOM_LEFT BOTTOM_CENTER BOTTOM_RIGHT BASE

padding

Padding

integer

0 <= 512

prompt_language

Prompt language

The language the prompt is written in, so it reaches the model as you meant it.

Advanced field.

string

nullable

Example

{
  "prompt": "a knight standing in a snowy forest",
  "aspect_ratio": "SQUARE_1K",
  "transparency": false,
  "guidance_file_init_image": [
    {
      "url": "<file_url>"
    }
  ],
  "guidance_file_reference_image": [
    {
      "url": "<file_url>"
    }
  ]
}

Responses

202

Successful Response

application/json

ExecuteForgeOutput

object

inference_id

required

Inference Id

Unique identifier for this forge run.

string format: uuid

status

required

InferenceStatus

Current status: IN_PROGRESS.

string

Allowed values: in_progress complete failed cancelled deleted

estimated_price_creative_units

Estimated Price Creative Units

Estimated price in Creative Units.

number

nullable

poll_interval_seconds

required

Poll Interval Seconds

Suggested polling interval in seconds.

integer

created_at

required

Created At

Timestamp of when the run was created.

string format: date-time

session_id

Session Id

Session ID the run was added to, if a session was specified.

string format: uuid

nullable

normalized_parameters

Any of:

NormalizedInferenceParameters
null

NormalizedInferenceParameters

Inference parameters after model-specific normalization.

These reflect the actual values used for generation, including model defaults applied for any parameters not explicitly set.

object

width

Width

Resolved output width in pixels.

integer

nullable

height

Height

Resolved output height in pixels.

integer

nullable

batch_size

Batch Size

Number of outputs to generate.

integer

nullable

num_inference_steps

Num Inference Steps

Resolved number of diffusion steps.

integer

nullable

guidance_scale

Guidance Scale

Resolved guidance scale.

number

nullable

duration_seconds

Duration Seconds

Resolved output length in seconds — video duration or audio clip length.

number

nullable

fps

Fps

Resolved FPS.

integer

nullable

Example

{
  "status": "in_progress"
}

401

Unauthenticated — missing or invalid Bearer token.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

403

Forbidden — insufficient permissions, or the access token lacks the scope the operation requires.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

404

Resource not found.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

409

The outcome of the request with this Idempotency-Key is not known yet: it is still running, or it failed without a stored response. Retry after the number of seconds in Retry-After.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

422

Invalid input parameters, or an Idempotency-Key reused for a different request.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

429

Rate limited — retry after the number of seconds in Retry-After.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

500

Internal server error.

application/problem+json

object

type

required

string

title

required

string

status

required

integer

detail

required

string

Example

{
  "type": "https://api.layer.ai/errors/ERROR_CODE",
  "title": "Error Title",
  "status": 400,
  "detail": "Human-readable description."
}

Gemini 2.5 Flash Image

Authorizations

Parameters

Path Parameters

Query Parameters

Header Parameters

Request Bodyrequired

Example

Responses

202

Example

401

Example

403

Example

404

Example

409

Example

422

Example

429

Example

500

Example

Request Body^required