bytedance/seedream/4.5A new-generation image creation model from ByteDance, Seedream 4.5 integrates text-to-image generation and image editing into a single unified architecture, delivering high-fidelity visuals, precise prompt control, and seamless creative workflows for professional AIGC applications.
Try the model
Customize your input with more control.
Your output will appear here
Complete the inputs, then click Run.
Human preference
Elo ratings from blind side-by-side votes, compared with other image and video models.
Rankings sourced from Artificial Analysis Arena
Text-to-image arena: people pick the better of two images generated from the same prompt, without seeing the model names.
Seedream 4.5 combines text-to-image and editing in one model, with sharp detail and strong typography. Seedream 5.0 is the newer generation.
| Field | Type | Default | Notes |
|---|---|---|---|
prompt | string, required | — | Up to 50,000 characters. |
aspect_ratio | 21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16 | 1:1 | Output shape. |
image_size | object | — | Optional explicit output size; overrides aspect_ratio. |
output_format | jpeg / png | png | Output file format. |
$0.04 per image.
| Request | Price |
|---|---|
| One image | $0.04 |
Failed runs are not charged.
Other Seedream endpoints: bytedance/seedream/5.0/pro, bytedance/seedream/5.0/pro/edit, bytedance/seedream/5.0/lite, bytedance/seedream/5.0/lite/edit, bytedance/seedream/5.0/flash, bytedance/seedream/5.0/flash/edit, bytedance/seedream/4.5/edit.
Start building
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "bytedance/seedream/4.5",
"prompt": "Vibrant close-up editorial portrait, model with piercing gaze, wearing a sculptural hat, rich color blocking, sharp focus on eyes, shallow depth of field, Vogue magazine cover aesthetic, shot on medium format, dramatic studio lighting.",
"aspect_ratio": "1:1",
"output_format": "png"
}
SANDBASE_JSON
)
run_id=$(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"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.
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
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"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.
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.
promptstringrequiredThe text prompt to generate an image from.
Default: "Vibrant close-up editorial portrait, model with piercing gaze, wearing a sculptural hat, rich color blocking, sharp focus on eyes, shallow depth of field, Vogue magazine cover aesthetic, shot on medium format, dramatic studio lighting."
image_sizeobjectaspect_ratiostringThe aspect ratio of the generated image.
Default: "1:1"
Possible values: "21:9", "16:9", "3:2", "4:3", "5:4", "1:1", "4:5", "3:4", "2:3", "9:16"
output_formatstringThe format of the generated image.
Default: "png"
Possible values: "jpeg", "png"
{
"model": "bytedance/seedream/4.5",
"prompt": "Vibrant close-up editorial portrait, model with piercing gaze, wearing a sculptural hat, rich color blocking, sharp focus on eyes, shallow depth of field, Vogue magazine cover aesthetic, shot on medium format, dramatic studio lighting.",
"aspect_ratio": "1:1",
"output_format": "png"
}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.