Seedream 4.5 Edit sequential: Cohesive Images-to-Images Editor on playground and API | RunComfy
bytedance/seedream-4-5/edit-sequential
Generate and edit coherent visual sequences from text or image inputs with advanced style control, multi-reference editing, and 4K output for consistent, production-ready storytelling.
Table of contents
1. Get started
Use RunComfy's API to run bytedance/seedream-4-5/edit-sequential. For accepted inputs and outputs, see the model's schema.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/bytedance/seedream-4-5/edit-sequential \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"images": [
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-1.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-2.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-3.png"
],
"prompt": "The man is riding a motor cycle on the road",
"sequential_image_generation_options": 3
}'2. Authentication
Set the YOUR_API_TOKEN environment variable with your API key (manage keys in your Profile) and include it on every request as a Bearer token via the Authorization header: Authorization: Bearer $YOUR_API_TOKEN.
3. API reference
Submit a request
Submit an asynchronous generation job and immediately receive a request_id plus URLs to check status, fetch results, and cancel.
curl --request POST \
--url https://model-api.runcomfy.net/v1/models/bytedance/seedream-4-5/edit-sequential \
--header "Content-Type: application/json" \
--header "Authorization: Bearer <token>" \
--data '{
"images": [
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-1.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-2.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-3.png"
],
"prompt": "The man is riding a motor cycle on the road",
"sequential_image_generation_options": 3
}'Monitor request status
Fetch the current state for a request_id ("in_queue", "in_progress", "completed", or "cancelled").
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
--header "Authorization: Bearer <token>"Retrieve request results
Retrieve the final outputs and metadata for the given request_id; if the job is not complete, the response returns the current state so you can continue polling.
curl --request GET \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
--header "Authorization: Bearer <token>"Cancel a request
Cancel a queued job by request_id, in-progress jobs cannot be cancelled.
curl --request POST \
--url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
--header "Authorization: Bearer <token>"4. File inputs
Hosted file (URL)
Provide a publicly reachable HTTPS URL. Ensure the host allows server‑side fetches (no login/cookies required) and isn't rate‑limited or blocking bots. Recommended limits: images ≤ 50 MB (~4K), videos ≤ 100 MB (~2–5 min @ 720p). Prefer stable or pre‑signed URLs for private assets.
5. Schema
Input schema
{
"type": "object",
"title": "Input",
"required": [
"images",
"prompt",
"sequential_image_generation_options"
],
"properties": {
"images": {
"title": "Images",
"description": "Upload 1~14 images, must be jpeg or png",
"type": "array",
"items": {
"type": "string",
"format": "image_uri"
},
"validations": [
{
"validation_rule": "file_size_mb<",
"validation_value": 10,
"validation_error": "File size must be less than 10 MB."
},
{
"validation_rule": "width/height>",
"validation_value": 0.625,
"validation_error": "The aspect ratio range should be 1:16 to 16:1."
},
{
"validation_rule": "width/height<",
"validation_value": 16,
"validation_error": "The aspect ratio range should be 1:16 to 16:1."
},
{
"validation_rule": "width_pixels>",
"validation_value": 14,
"validation_error": "The uploaded image width and height must exceed 14 pixels."
},
{
"validation_rule": "height_pixels>",
"validation_value": 14,
"validation_error": "The uploaded image width and height must exceed 14 pixels."
},
{
"validation_rule": "width_pixels<",
"validation_value": 6000,
"validation_error": "The uploaded image width and height must not exceed 6000 pixels."
},
{
"validation_rule": "height_pixels<",
"validation_value": 6000,
"validation_error": "The uploaded image width and height must not exceed 6000 pixels."
}
],
"maxItems": 14,
"minItems": 1,
"default": [
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-1.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-2.png",
"https://playgrounds-storage-public.runcomfy.net/tools/7250/media-files/input-1-3.png"
]
},
"prompt": {
"title": "Prompt",
"description": "The prompt should be less than 600 characters. Your prompt needs to contain the number of images you want to generate. Example: 'Generate 3 images of a beautiful sunset over a calm ocean.'",
"type": "string",
"default": "The man is riding a motor cycle on the road"
},
"resolution": {
"title": "Resolution",
"description": "For 2K and 4K options, it will let the model determine the width and height. you should describe its aspect ratio, shape, or purpose in the prompt using natural language. For other options, you can choose the width and height you want.",
"type": "string",
"enum": [
"2K",
"4K",
"2048x2048 (1:1)",
"2304x1728 (4:3)",
"1728x2304 (3:4)",
"2560x1440 (16:9)",
"1440x2560 (9:16)",
"2496x1664 (3:2)",
"1664x2496 (2:3)",
"3024x1296 (21:9)",
"4096x4096 (1:1)"
],
"default": "2048x2048 (1:1)"
},
"seed": {
"title": "Seed",
"description": "",
"type": "integer",
"default": 54519385
},
"sequential_image_generation_options": {
"title": "Maximum Number of Generated Images",
"description": "Sets the maximum number of images to generate. The actual number of images that can be generated also depends on the number of reference images provided. The final price will be calculated based on this value.",
"type": "integer",
"enum": [
1,
2,
3,
4,
5,
6,
7,
8,
9,
10,
11,
12,
13,
14,
15
],
"default": 3
}
}
}Output schema
{
"output": {
"type": "object",
"properties": {
"image": {
"type": "string",
"format": "uri",
"description": "single image URL"
},
"video": {
"type": "string",
"format": "uri",
"description": "single video URL"
},
"images": {
"type": "array",
"description": "multiple image URLs",
"items": { "type": "string", "format": "uri" }
},
"videos": {
"type": "array",
"description": "multiple video URLs",
"items": { "type": "string", "format": "uri" }
}
}
}
}