promptstringrequired
The text prompt used to generate the image.
Seedream 5.5 Text to Image
bytedance/seedream/5.5Seedream 5.5 by ByteDance generates photorealistic images from text prompts, with accurate small and multilingual text and native transparent-background (RGBA) output. Choose 1K, 1.5K or 2K resolution and ten aspect ratios.
Try the model
Playground
Input
The text prompt used to generate the image.
The aspect ratio of the generated image. Leave unset to let the model choose from the prompt.
Output resolution tier. 1K and 1.5K cost less; 2K is the highest quality.
Advanced settings
auto lets the model decide; transparent returns a PNG with an alpha channel (requires png output); opaque never adds transparency.
The number of images to generate. Currently limited to 1. Range: 1 to 1.
The file format of the generated image. Use png for transparent backgrounds.
ResultIdle
Your output will appear here
Complete the inputs, then click Run.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "bytedance/seedream/5.5",
"prompt": "Vibrant editorial of a model in contemporary fashion fused with West African textile patterns and beadwork, Campbell Addy bold aesthetic, saturated palette, dramatic studio lighting, celebratory cultural richness, striking contemporary portraiture",
"background": "auto",
"num_images": 1,
"resolution": "2K",
"output_format": "png"
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
status=$(printf '%s' "$result" | jq -r .status)
case "$status" in completed|failed|timeout) break ;; esac
sleep 2
result=$(curl --fail-with-body --silent \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
"https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"2. Authentication
Create a SandBase API key and set it in your server environment. All requests use Bearer authentication.
export SANDBASE_API_KEY="YOUR_API_KEY"Keep the key on your server. Do not expose it in browser code or commit it to a repository.
3. Queue
Submit a request
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
Fetch request status and result
Use the returned run ID to poll until the status is completed, failed or timeout. Read output only after completed.
curl "https://api.sandbase.ai/v1/run/$RUN_ID" \
-H "Authorization: Bearer $SANDBASE_API_KEY"4. Files
Hosted files
Pass a publicly accessible file URL in the model’s image, video or audio field. Supported formats and limits are shown beside each Playground input.
Uploading images
Use the upload or replace control on supported image fields in the Playground. Video URL fields accept a hosted driving video; they do not imply video-upload support.
5. Schema
Input
backgroundstring
auto lets the model decide; transparent returns a PNG with an alpha channel (requires png output); opaque never adds transparency.
Default: "auto"
Possible values: "auto", "transparent", "opaque"
num_imagesinteger
The number of images to generate. Currently limited to 1.
Default: 1
Minimum: 1
Maximum: 1
resolutionstring
Output resolution tier. 1K and 1.5K cost less; 2K is the highest quality.
Default: "2K"
Possible values: "1K", "1.5K", "2K"
aspect_ratiostring
The aspect ratio of the generated image. Leave unset to let the model choose from the prompt.
Possible values: "21:9", "16:9", "3:2", "4:3", "5:4", "1:1", "4:5", "3:4", "2:3", "9:16"
output_formatstring
The file format of the generated image. Use png for transparent backgrounds.
Default: "png"
Possible values: "jpeg", "png"
{
"model": "bytedance/seedream/5.5",
"prompt": "Vibrant editorial of a model in contemporary fashion fused with West African textile patterns and beadwork, Campbell Addy bold aesthetic, saturated palette, dramatic studio lighting, celebratory cultural richness, striking contemporary portraiture",
"background": "auto",
"num_images": 1,
"resolution": "2K",
"output_format": "png"
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
No example output has been published yet. Use Playground → Result → JSON after a completed run to inspect your response.