Seedream 4.5

seedream-4-5-251128

POST /v1/images/generations (synchronous)

Previous-generation model with group generation.

• Sizes: 2K, 4K, or explicit W×H within 3,686,400–16,777,216 px (aspect ratio 1:16–16:1); default 2K
• Reference images: up to 14
• Group generation: sequential_image_generation: "auto" with sequential_image_generation_options.max_images (1–15); inputs + outputs ≤ 15 images
• Output is JPEG only — do not send output_format (it is rejected)
• Group generation: sequential_image_generation / sequential_image_generation_options supported

See the family page for the shared request shape, reference-image rules, and billing rules: Seedream.

Billing

Billed per generated image at a flat rate (output size does not change the price). Group generation bills the actual count from usage.generated_images, not max_images. Reference images are free. Moderation-blocked or failed images are not billed.

Request example

curl https://api.apimart.cc/v1/images/generations \
  -H "Authorization: Bearer $HIPIX_API_KEY" \
  -H "Content-Type: application/json" \
  --data-raw '{"model": "seedream-4-5-251128", "prompt": "A 4-panel comic", "size": "2K", "sequential_image_generation": "auto", "sequential_image_generation_options": {"max_images": 4}}'