Seedream 4 by ByteDance — unified generation and editing model with photorealism and strong prompt adherence. Standard and fast inference modes. $0.03/image.
Multiple versions for different quality and cost trade-offs — all on the same Runflow API.
Latest version — unified generation + editing architecture
Previous generation — solid quality at lower price point
Every model on Runflow is scored per vertical — not generic leaderboard numbers. Scores come from domain-expert evaluation on real production prompts.
| Use Case | Assessment | Notes |
|---|---|---|
| Portrait | Strong | Unified architecture handles photorealistic portraits well |
| Fashion | Strong | Good detail and lighting for editorial-style imagery |
| Product | Strong | Clean backgrounds, accurate product rendering |
| Creative | Strong | Flexible artistic composition and style control |
Full parameter reference for the seedream-4 model endpoint.
| Parameter | Type | Description |
|---|---|---|
| prompt | string | Text prompt describing the image to generate. |
| image_size | object | string | Output size. Total pixels must be between 960×960 and 4096×4096. Default: 2048×2048. |
| num_images | integer | Number of generation runs. Range: 1–6. Default: 1. |
| max_images | integer | Max images per generation run (enables multi-image mode). Range: 1–6. Default: 1. |
| enhance_prompt_mode | string | Prompt enhancement quality. "standard" = higher quality, slower. "fast" = good quality, lower latency. Default: "standard". |
| enable_safety_checker | boolean | Enable content moderation. Default: true. |
| seed | integer | Random seed for reproducible outputs. |
| sync_mode | boolean | Return media as data URI without storing in history. Default: false. |
Flux AI models are available on many platforms. Here's what makes the Runflow image generation API different.
The enhance_prompt_mode parameter lets you choose standard (higher quality) or fast (lower latency) at every request — no model switching needed.
At $0.03/image, Seedream 4 is the most affordable option in the family while still delivering the unified generation and editing architecture.
Generate images from 960×960 up to 4096×4096 pixels with flexible custom dimensions via the image_size parameter.
Every output is scored by Runflow's Sentinel system before delivery, catching low-quality or off-prompt results automatically.
Same API, different strengths. Switch models with one parameter change.
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Get API access in minutes. No GPU setup, no infrastructure to manage. Pair with Sentinel to control the quality of every AI-generated image you ship.