Gpt Image 1.5
gpt-image-1-5OpenAI's latest image generation model with better instruction following and adherence to prompts
- Price
- US$0.1632/image
- Aspect ratios
- 1:1, 3:2, 2:3
- Input → output
- Text → Image
- Developer
- OpenAI
- Updated
- 24 September 2026
The provider is phasing this model out.
Newer version available: Gpt Image 2
Playground
Try Gpt Image 1.5
Input & output
This run
US$0.1632 · 16.32 credits
For accounts without a purchase: runs above 2 credits need a top-up.
New here?
10 free credits (US$0.10) when you sign up with Google
Usable 24 hours after sign-up, up to 5 runs per day and at most 2 credits per run. Other sign-in methods start without credits.
Examples
Open full sizePrompt
make a scene in chelsea, london in the 1970s, photorealistic, everything in focus, with tons of people, and a bus with an advertisement for "ImageGen 1.5 on Replicate" with the OpenAI logo and subtitle "Create what you imagine". Hyper-realistic amateur photography, iPhone snapshot quality
Settings
- aspect_ratio
- 1:1
- quality
- high
Open full size
InputPrompt
Turn me into an ornament sculpted from glossy molded glass, finished in a high-shine lacquer that catches light from every angle. Its surface feels perfectly smooth and cool, with a weight that suggests fragility and permanence at once. The coating is a lustrous enamel, somewhere between ceramic and candy shell — reflective enough that small highlights bloom across its curves like soft sparks. Tiny metallic embellishments trace the outlines of form and texture — dots, lines, and filigree patterns that shimmer as they move. These are applied with fine glittering paint or microbeads, giving the sense of hand-finished ornamentation; the shimmer isn’t flat, but layered, so the light seems to dance over raised details. The whole piece radiates a feeling of retro kitsch luxury: vivid color blocked against gleaming accents, playful yet deliberate. There’s a subtle iridescence where curves catch light — hints of gold, rose, and pearl. The finish feels almost edible, like glazed sugar or melted candy poured into shape. Suspended from a delicate gold loop and string, the ornament hovers with a gentle theatricality, equal parts festive and sculptural. It’s the kind of object that feels both iconic and humorous, a statement piece meant to sparkle under tree lights or studio lamps — an embodiment of camp elegance and handcrafted nostalgia.
Settings
- aspect_ratio
- 1:1
- quality
- high
Open full sizePrompt
los angeles landscape skateboarding shot with the following style: late 1990s documentary street photography shot on 35mm color film, Leica M-style rangefinder camera with a 35mm lens, Kodak Portra 400 color palette, natural daylight, soft contrast, muted realistic colors, embedded film grain, slight edge softness, observational candid framing, no HDR, no modern digital sharpness, no cinematic lighting
Settings
- aspect_ratio
- 3:2
- quality
- high
About Gpt Image 1.5
Gpt Image 1.5 is a model by OpenAI in the Image generation category. On Railwail, Gpt Image 1.5 costs US$0.1632 per image. Depending on the settings, the price ranges from US$0.0156/image to US$0.1632/image. Supported aspect ratios: 1:1, 3:2 and 2:3. Newer version: Gpt Image 2.
Pricing
| quality: autoDefault | US$0.1632 per image |
|---|---|
| quality: low | US$0.0156 per image |
| quality: medium | US$0.060 per image |
| quality: high | US$0.1632 per image |
- 1 credit = US$0.01
Cost calculator
Price calculator
Total
US$16.32
1,632 credits
Per run
US$0.1632 · 16.32 credits
Fixed price per run, known before the run starts.
API
curl https://railwail.com/api/v1/images/generations \
-H "Authorization: Bearer $RAILWAIL_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-image-1-5",
"prompt": "A lighthouse on a rocky coast at sunset, photorealistic"
}'import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["RAILWAIL_API_KEY"],
base_url="https://railwail.com/api/v1",
)
image = client.images.generate(
model="gpt-image-1-5",
prompt="A lighthouse on a rocky coast at sunset, photorealistic",
)
print(image.data[0].url)import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.RAILWAIL_API_KEY,
baseURL: "https://railwail.com/api/v1",
});
const image = await client.images.generate({
model: "gpt-image-1-5",
prompt: "A lighthouse on a rocky coast at sunset, photorealistic"
});
console.log(image.data[0].url);// npm install railwail
import railwail from "railwail";
const rw = railwail(process.env.RAILWAIL_API_KEY);
const res = await rw.image("gpt-image-1-5", "A lighthouse on a rocky coast at sunset, photorealistic");
console.log(res.data[0].url);Specifications
- Model ID
gpt-image-1-5- Developer
- OpenAI
- Category
- Image generation
- Input
- Text
- Output
- Image
- Aspect ratios
- 1:1, 3:2, 2:3
- Billing
- Fixed price, known before the run
- Lifecycle
- Deprecated
- Catalog entry updated
- 24 September 2026
Input parameters
Inputs and settings from the model's input schema. The example in the API section shows which of them the API accepts.
promptrequiredType: TextDefault: –Allowed values: –aspectRatioType: ChoiceDefault: –Allowed values: 1:1, 3:2 or 2:3
Tags
- replicate
- openai
- text-to-image
Use cases
Frequently asked questions
What is Gpt Image 1.5?
Gpt Image 1.5 is a model by OpenAI in the Image generation category. On Railwail you can call it with an API key through the Railwail API.
How much does Gpt Image 1.5 cost on Railwail?
On Railwail, Gpt Image 1.5 costs US$0.1632 per image. Depending on the settings, the price ranges from US$0.0156/image to US$0.1632/image. The price is known before the run starts. Usage is paid from prepaid credits; 1 credit equals US$0.01.
Which settings does Gpt Image 1.5 support?
According to its input schema, Gpt Image 1.5 knows these parameters: prompt and aspectRatio (1:1, 3:2 or 2:3).
How fast is Gpt Image 1.5?
There are not enough measured runs of Gpt Image 1.5 on Railwail yet to state a run time. It depends on the input, the settings and the load at the provider.
Is Gpt Image 1.5 better than Gpt Image 2?
That depends on the task. Gpt Image 1.5 (OpenAI) and Gpt Image 2 (OpenAI) are both models in the Image generation category. The comparison page shows their prices and specifications side by side.
Compare Gpt Image 1.5 and Gpt Image 2How do I use Gpt Image 1.5 through the API?
Create a Railwail API key and send your request with the model ID gpt-image-1-5. Code examples for curl, Python and JavaScript are in the API section of this page.
Comparable models
All in this category- FLUX 1.1 ProBlack Forest Labs
Black Forest Labs' flagship text-to-image model. Faster generation than FLUX.1 Pro at higher prompt adherence, with strong photorealism and reliable spatial composition. Runs as a hosted Replicate model.
- Flux 1.1 Pro UltraBlack Forest Labs
FLUX 1.1 Pro in ultra mode. Up to 4 megapixel images with raw mode for photorealism.
- Flux DevBlack Forest Labs
Black Forest Labs' development model. Fast, high-quality image generation with LoRA support.
Use Gpt Image 1.5 via the API
One API key for every model on Railwail. Usage is charged from prepaid credits, 1 credit = US$0.01.