Seedream 4.5 API reference
Exact text in 2K and 4K images, with edits from up to 14 references
Call Seedream 4.5 from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in USD, and a request you can paste into a terminal.
At a glance
- Made by
- ByteDance
- Output
- Image
- From
- $0.04 USD per image
- Typical time
- about 14 s
Prices are in USD, charged to your separate API wallet. A task reserves the maximum possible charge when accepted and settles actual usage on completion; any remainder is released. Failed tasks are not charged. Call POST /api/v1/jobs/quote for an exact quote before running.
Create Image
bytedance/seedream-4.5/text-to-image
Price
| Option | USD |
|---|---|
Default | $0.04 per image |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | up to 3,000 characters | Describe the image to generate: subject, composition, style, lighting and any exact text in quotes. |
aspect_ratioOptional | string | 1:1 | 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9 | Output aspect ratio. |
resolutionOptional | string | 2k | 2k, 4k | Output resolution tier: 2k is about 4 megapixels, 4k about 16. Both cost the same. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedream-4.5/text-to-image",
"input": {
"prompt": "A cozy reading nook beside a rain-streaked window, warm lamp light, a sleeping orange cat on a knitted blanket, soft film grain"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Edit Image
bytedance/seedream-4.5/edit
Price
| Option | USD |
|---|---|
Default | $0.04 per image |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | up to 3,000 characters | Describe the image to produce from the references, and what each reference contributes. |
image_urlsRequired | array<string (uri)> | — | up to 14 items | One to fourteen reference images that you are authorised to process. |
aspect_ratioOptional | string | 1:1 | 1:1, 4:3, 3:4, 16:9, 9:16, 3:2, 2:3, 21:9 | Output aspect ratio. |
resolutionOptional | string | 2k | 2k, 4k | Output resolution tier: 2k is about 4 megapixels, 4k about 16. Both cost the same. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
The example uses PopNow sample files in image_urls. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask?wait=60" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedream-4.5/edit",
"input": {
"prompt": "Change the orange jacket to deep forest green and add soft golden-hour light; keep the face, pose and background unchanged",
"image_urls": [
"https://media.popnow.ai/influencer/examples/marco.webp"
]
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"