Doubao Seedream 5.0 Flash API
Seedream 5.0 Flash is the cheapest Seedream tier on Roko, with 1K output from $0.02 per image. It handles text generation and reference editing; official capabilities also include precise editing, transparent backgrounds, and layer splitting, with one image per request.
- Public model ID
doubao-seedream-5.0-flash- Output tiers
1K / 2K- Billing
Per output and resolution- Generation endpoint
POST /v1/images/generations- Catalog snapshot
What is Doubao Seedream 5.0 Flash?
Seedream 5.0 Flash is the fast, cost-efficient creation tier of ByteDance's Doubao Seedream image family. Roko API exposes it under the public model ID doubao-seedream-5.0-flash, with current project pricing of $0.02 per 1K image and $0.024 per 2K image.
The Volcengine Ark model page lists the Flash version as doubao-seedream-5-0-flash-260915: text, single-image, and multi-reference input; precise editing, layer splitting, and transparent-background output; and a single image per request.
Roko currently exposes 1K and 2K output tiers and up to 10 reference images. Flash is the project's cost floor for rapid drafts and smaller assets. The official limit is one generated image per request, so batch workloads should loop individual calls. For 4K output, compare 5.0 Lite, 4.5, and 5.0 Pro.
Core capabilities
Text to image and precise editing
Generate from a text prompt in Chinese or English, or apply precise edits and restyling to a reference image.
Multi-reference fusion
Blend subjects, outfits, or styles from several reference images into one new picture — up to 10 references in the current Roko form.
Transparent background and layer splitting
The official model page explicitly lists transparent-background output and layer splitting. Roko's public form has no dedicated controls for them yet, so the invocation details follow request validation and the actual response.
Family price floor
$0.02 per 1K image and $0.024 per 2K image, sized for high-frequency drafts, batch assets, and A/B creative tests.
Doubao Seedream 5.0 Flash API pricing
Pricing is generated from the current Roko model catalog. The total is outputs multiplied by the selected resolution rate; confirm the estimate before submission.
| Resolution | Price | Unit |
|---|---|---|
| 1k | $0.02 | per output |
| 2k | $0.024 | per output |
Cost examples
For drafts, composition checks, and small social assets.
Typical spend for batch assets and creative screening; failures are not counted as generated.
Parameters and supported values
These fields come from the current public generation_config. The upstream version is published on the official Volcengine Ark model page; parameters outside the form follow request validation.
| Parameter | Values | Notes |
|---|---|---|
prompt | textarea | Describe the image to create or the changes to apply to references. · Required |
image | ≤10 | Reference images may use URL or Base64. State what must stay and what may change. · Optional |
size | text | Selects an aspect ratio, resolution tier, or explicit pixel dimensions as configured for the model. · Optional |
output_format | png / jpeg | File format of generated images: png or jpeg. · Optional |
response_format | url | Synchronous Seedream delivery currently accepts url only; results are copied to Roko-managed storage. · Default: url · Optional |
watermark | boolean | Whether to add an “AI generated” watermark to outputs. · Default: false · Optional |
stream | false | Synchronous Seedream result storage currently requires false; stream=true is rejected during request validation. · Default: false · Optional |
Call Seedream 5.0 Flash with Roko API
Call the synchronous image-generation endpoint; a successful response returns an image URL. Never expose an API key in client-side code.
Submit a generation request
curl https://api.rokoapi.com/v1/images/generations \
-H "Authorization: Bearer $API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "doubao-seedream-5.0-flash",
"prompt": "Minimal desk workspace from above, laptop, coffee, and notebook, soft natural light",
"size": "1K",
"response_format": "url"
}'Read the result from data[].url in the generation response. Result URLs expire, so download promptly; use backoff for timeouts, rate limits, and failed responses.
Common use cases
Batch concept drafts
Screen prompt directions at the lowest per-image cost, then re-run finals on a higher tier.
Three composition options for the same cartoon detective character, flat illustration style, white background.
Social and content assets
Fast production of small-size images for community posts and slide decks.
Morning city skyline silhouette, warm orange gradient sky, landscape 16:9, clean flat style.
Transparent product images
The official page notes Flash generates one image per request; for batch assets, loop per-image calls for better stability.
White wireless earbuds floating on a light gray backdrop, professional product photography, soft shadows, transparent background output.
Editing and background swaps
Apply precise edits to a reference — swap backgrounds, outfits, or elements by stating what stays and what changes.
Keep the product unchanged and replace the background with a plain studio backdrop, soft shadows.
Important limitations
- Roko currently exposes 1K and 2K tiers only; there is no 4K — use 5.0 Lite (2K/4K) for higher resolutions.
- The official version is doubao-seedream-5-0-flash-260915, and the official model page explicitly limits Flash to one image per request. Set-generation fields in Roko's catalog are public configuration, but they do not override that official limit; loop per-image calls for batches.
- Transparent-background output and layer splitting are official model capabilities. Roko's public form has no dedicated controls for them yet, so invocation details follow request validation and the actual response.
- Text, hands, and fine details can still be wrong — review final assets. Output rights depend on your inputs and applicable terms.
Choosing between Seedream models
Flash is the cost floor: 1K/2K from $0.02, officially positioned for rapid creation and precise editing. Pick 5.0 Lite for 2K/4K output and image sets, 4.5 for print-grade fidelity and reference consistency, and 5.0 Pro for premium single images.
All models →Doubao Seedream 5.0 Flash FAQ
What model ID should I use for Seedream 5.0 Flash?
Use the public Roko API model ID doubao-seedream-5.0-flash exactly as shown in the model field. The official version ID is doubao-seedream-5-0-flash-260915.
How much does the Seedream 5.0 Flash API cost?
The current catalog lists $0.02 per 1K output and $0.024 per 2K output — the cheapest Seedream tier on Roko. Prices can change; confirm the console estimate and final settlement.
Flash vs Lite — what's the difference?
On Roko, Flash exposes 1K/2K tiers ($0.02/$0.024), while Lite exposes 2K/4K ($0.03/$0.036). Officially, Flash focuses on rapid creation with precise editing, layer splitting, transparent backgrounds, and one image per request; Lite targets higher resolutions and series creation.
Which resolutions and sizes are supported?
Roko currently exposes 1K and 2K tiers. The size field also accepts explicit pixel dimensions; usable values follow request validation.
Can one request generate multiple images?
No. The official model page explicitly limits Flash to one image per request. Even though Roko's catalog exposes generic fields such as sequential_image_generation, follow the official limit and loop individual calls for batch work.
Does Seedream 5.0 Flash support image editing?
Yes — precise editing is an officially listed capability. Passing reference images switches the task into image-to-image/editing: background swaps, outfit changes, local edits, and multi-image fusion with up to 10 references (the current Roko value).
Can I use transparent background and layer splitting?
They are confirmed official Flash capabilities. Roko's current public form has no dedicated controls for them, so the exact invocation still depends on request validation and the actual response.
How does the API return the image?
Roko currently calls this model through synchronous POST /v1/images/generations. Read the result from data[].url and store it promptly because the URL expires.
Is Flash output quality enough for commercial work?
Flash is the fast, low-cost tier — best for drafts, posts, and batch assets. Brand and print finals are better served by 4.5 or 5.0 Pro, and every final asset deserves human review. Commercial rights depend on your inputs and applicable terms.