OpenAI GPT Image 2.5 Sunburst Text-to-Image
openai/gpt-image-2.5-sunburst/text-to-image
High-fidelity image generation for detailed compositions and demanding production work, with up to 4K output.
Examples



Parameters
| Name | Type | Default | Constraints | Description |
|---|---|---|---|---|
| prompt *Prompt | textarea | — | ≤ 5000 chars | The positive prompt for the generation. |
| nImage Count | slider | 1 | 1 ~ 10 | The number of images to generate (1-10). Each image is billed separately. |
| aspect_ratioAspect Ratio | select | 1:1 | 1:1 | 1:2 | 2:1 | 1:3 | 3:1 | 2:3 | 3:2 | 3:4 | … | The aspect ratio of the generated image. Ignored if 'size' is specified. |
| resolutionResolution | select | 1k | 1k | 2k | 4k | Output resolution level. Ignored if 'size' is specified. |
| sizeSize | text | — | — | Specific image resolution. The format is [width]x[height]. If specified, aspect_ratio and resolution will be ignored. |
| qualityQuality | select | auto | auto | low | medium | high | xhigh | max | Rendering quality. Higher quality costs more and takes longer. |
| output_formatOutput Format | select | png | png | jpeg | webp | The format of the output image. JPEG is faster for low latency. |
| output_compressionCompression | number | — | 0 ~ 100 | Compression level, only valid for JPEG/WebP (0-100). |
| moderationModeration | select | auto | auto | low | Content moderation level. |
Output fields
| Field | Type | Description |
|---|---|---|
| images | array<string> |
API
Call this model through one unified REST API. Get a key on the API Keys page.
cURL
# 1) Submit — returns { "task_uuid": "..." }
curl -X POST "https://www.namifusion.com/api/v1/marketplace/run/openai/gpt-image-2.5-sunburst/text-to-image" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"input": {
"prompt": "A futuristic cityscape at sunset, with glowing skyscrapers and flying cars.",
"n": 1,
"aspect_ratio": "1:1",
"resolution": "1k",
"quality": "auto",
"output_format": "png",
"moderation": "auto"
}
}'
# 2) Poll until status is "completed", then read the output URLs
curl "https://www.namifusion.com/api/v1/marketplace/run/tasks/TASK_UUID" \
-H "Authorization: Bearer YOUR_API_KEY"Python
import time, requests
API_KEY = "YOUR_API_KEY"
HEADERS = {"Authorization": f"Bearer {API_KEY}"}
# 1) Submit
resp = requests.post(
"https://www.namifusion.com/api/v1/marketplace/run/openai/gpt-image-2.5-sunburst/text-to-image",
headers=HEADERS,
json={
"input": {
"prompt": "A futuristic cityscape at sunset, with glowing skyscrapers and flying cars.",
"n": 1,
"aspect_ratio": "1:1",
"resolution": "1k",
"quality": "auto",
"output_format": "png",
"moderation": "auto"
}
},
)
resp.raise_for_status() # 401/402/429/5xx stop here instead of polling a bad task
task = resp.json()
# 2) Poll until a terminal state (completed / failed / cancelled).
# This model is allowed up to 600s server-side.
deadline = time.time() + 660
while task.get("status") not in ("completed", "failed", "cancelled"):
if time.time() > deadline:
raise TimeoutError(f"still {task.get('status')} — keep the task_uuid and poll later")
time.sleep(3)
poll = requests.get(f"https://www.namifusion.com/api/v1/marketplace/run/tasks/{task['task_uuid']}", headers=HEADERS)
poll.raise_for_status()
task = poll.json()
print(task["status"], task.get("output"))JavaScript
const API_KEY = "YOUR_API_KEY";
const HEADERS = { Authorization: `Bearer ${API_KEY}` };
// 1) Submit
const resp = await fetch("https://www.namifusion.com/api/v1/marketplace/run/openai/gpt-image-2.5-sunburst/text-to-image", {
method: "POST",
headers: { ...HEADERS, "Content-Type": "application/json" },
body: JSON.stringify({
"input": {
"prompt": "A futuristic cityscape at sunset, with glowing skyscrapers and flying cars.",
"n": 1,
"aspect_ratio": "1:1",
"resolution": "1k",
"quality": "auto",
"output_format": "png",
"moderation": "auto"
}
}),
});
if (!resp.ok) throw new Error(`submit failed: ${resp.status} ${await resp.text()}`);
let task = await resp.json();
// 2) Poll until a terminal state (completed / failed / cancelled).
// This model is allowed up to 600s server-side.
const deadline = Date.now() + 660 * 1000;
while (!["completed", "failed", "cancelled"].includes(task.status)) {
if (Date.now() > deadline) throw new Error(`still ${task.status} — keep the task_uuid and poll later`);
await new Promise((r) => setTimeout(r, 3000));
const poll = await fetch(`https://www.namifusion.com/api/v1/marketplace/run/tasks/${task.task_uuid}`, { headers: HEADERS });
if (!poll.ok) throw new Error(`poll failed: ${poll.status}`);
task = await poll.json();
}
console.log(task.status, task.output);Documentation
OpenAI GPT Image 2.5 Sunburst Text-to-Image
High-fidelity image generation for detailed compositions and demanding production work, with up to 4K output.
API endpoint
POST /api/v1/marketplace/run/openai/gpt-image-2.5-sunburst/text-to-image
Submit JSON as {"input": {...}}, then poll GET /api/v1/marketplace/run/tasks/{task_uuid} until the task completes.
Parameters
prompt(required): Image description, up to 5,000 characters.n: 1 to 10 images; default1.aspect_ratio:1:1,1:2,2:1,1:3,3:1,2:3,3:2,3:4,4:3,4:5,5:4,9:16,16:9,9:21, or21:9.resolution:1k,2k, or4k; default1k.size: Optional explicitwidthxheight; when supplied it overridesaspect_ratioandresolution.quality:auto,low,medium,high,xhigh, ormax; defaultauto.output_format:png,jpeg, orwebp; defaultpng.output_compression: 0 to 100; only relevant to compressed formats.moderation:autoorlow; defaultauto.
Output
{"images": ["https://..."]}
Pricing
Nami calculates the final charge from the actual token usage returned by MaaS. OpenAI Standard rates are $5.00/M text input tokens, $1.25/M cached text input tokens, $8.00/M image input tokens, $2.00/M cached image input tokens, and $30.00/M image output tokens.
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