GPT-Image-1.5

Vendor: OpenAI

Image

Versatile editing with natural language instructions

Typical latency: 10-30s
Reference inputs: Up to 4
toolId: gpt-image-1-5

Input modes

text-to-imageimage-to-image

Parameters

Parameter	Type	Default	Values	Notes
image_size	select	1024x1024	auto \| 1024x1024 \| 1536x1024 \| 1024x1536	Output size in pixels; Auto lets the model pick and settles onto the measured size.
quality	select	low	auto \| low \| medium \| high	Rendering quality tier; higher tiers cost more. Auto lets the model choose and settles onto the rendered tier.
background	select	auto	auto \| transparent \| opaque	Transparent renders a PNG with no background; Auto lets the model decide.
num_images	select	1	1 \| 2 \| 3 \| 4	How many variations to generate in one run. More images cost more; re-quote after changing.
output_format	select	png	png \| jpeg	File format for the result. PNG keeps transparency; JPEG is smaller.
input_fidelity	select	high	low \| high	How strictly the result follows the uploaded reference.

Pricing

Pricing will be published shortly — contact us for early access rates

Prices last updated: —

API example

POST /v1/generations — gpt-image-1-5

curl -X POST https://api.mukelabs.com/v1/generations \
  -H "Authorization: Bearer $MUKE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "toolId": "gpt-image-1-5",
    "inputMode": "text-to-image",
    "prompt": "your prompt here",
    "params": { "image_size": "auto" },
    "references": [],
    "idempotencyKey": "a-unique-key-per-task",
    "subjectId": "your-user-id"
  }'

FAQ

How do I call GPT-Image-1.5 on Muke Labs?

Submit POST /v1/generations with toolId "gpt-image-1-5" and one of its input modes (text-to-image, image-to-image), then poll GET /v1/generations/{jobId} for the result.

What does GPT-Image-1.5 cost?

Public pricing for this model is being finalized — contact us for early access rates. All tasks are billed from your prepaid USD balance and failed tasks refund automatically.

What happens if a task fails?

The job returns status "failed" with a typed error code, and its charge is returned to your balance automatically.

Where do I get an API key?

Create one in the developer portal (https://portal.muke.name), then send it as a Bearer token on every request.