Seedream 5.0 Flash Text to Image API

bytedance/seedream-v5.0-flash/text-to-image
1K / 1.5K / 2K · 4 credits · $0.020

Seedream 5.0 Flash Text to Image turns text prompts into high-definition 1K to 2K images, with Chinese and English text layout and 8 aspect ratios. It closely follows complex prompts while providing fine control over lighting and composition.

Input
1086 / 5,000
OutputReady
4 credits × $0.005 = $0.020

Continue with

Examples

text-02-output

An immersive ultrawide underwater documentary photograph inside an old wooden shipwreck at a depth of twenty meters. One marine archaeologist in a realistic black diving suit, transparent mask, regulator, air tank and fins hovers horizontally with neutral buoyancy on the left, without touching the seabed. Their right hand aims a compact underwater flashlight toward a single half-buried terracotta amphora in the right foreground. The warm focused flashlight reveals ancient encrusted clay and tiny suspended silt particles. Curved wooden ribs recede into the background; cool turquoise sunbeams enter through a break in the hull above. Clear separation of the diver, amphora and wreck, physically plausible bubbles and water haze, detailed decaying wood, subtle coral growth, realistic anatomy and equipment connections, quiet discovery rather than action spectacle. No writing, numbers, logos, advertisements, watermarks, extra people or fantasy creatures.

text-03-output

A charming vertical stop-motion film still of a handmade rooftop garden at sunset. One girl puppet with dark yarn hair and a mustard felt coat stands on the left. Her anatomy is clearly visible: exactly two arms and two hands, one left arm raised toward a floating red paper kite, and her right arm resting down at her side with the right hand touching the coat pocket. No overlapping arms, no duplicated hands, no motion trails. A small friendly origami dragon sits on a terracotta pot at lower right and holds the kite string in one paper forepaw so the kite cannot escape. The red kite floats above them on the single taut cotton string. A few green plants, low brick parapet and distant miniature rooftops complete the scene. Warm golden sunset backlight, soft violet shadows, visible felt fibers, yarn strands, folded paper creases, translucent red kite paper and handmade clay textures. Purposeful simple staging, believable miniature scale. No lettering, symbols, logos, advertising or watermarks.

Seedream 5.0 Flash Text to Image

Seedream 5.0 Flash Text to Image is a lightweight, efficient image generation model developed by ByteDance for rapid iteration. Built on a deeply optimized diffusion transformer architecture, it generates images in approximately 27 to 31 seconds and excels at following instructions for text layout and color consistency, delivering high throughput for concept sketches and commercial creative assets.

Why Choose Seedream 5.0 Flash Text to Image?

  • Fast generation and responsive interactionMedian generation time is approximately 27 to 31 seconds per image, significantly reducing wait times for AI agents and automated pipelines that need real-time batch generation.

  • The same rate for 1K and 2K imagesGenerate high-definition images at 1K, 1.5K or 2K resolution. Every tier costs 4 credits ($0.020) per request, balancing image quality with budget control.

  • Excellent in-image text renderingSpecify Chinese or English text directly in your prompt and render it within the image. Clear, neatly formed lettering speeds up layout work for marketing posters, signs and cover designs.

  • A wide range of native aspect ratiosChoose from 8 aspect ratios: 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, 2:3 and 21:9. Native support accommodates mobile short videos, desktop widescreens and e-commerce product detail pages.

  • Close adherence to complex promptsThe model understands spatial relationships between multiple subjects, materials, lighting and complex artistic styles. Accurate prompt interpretation reduces unpredictable results and repeated trial and error.

Parameters

ParameterRequirementDescription
promptRequired

Non-blank text, up to 5,000 Unicode characters.

sizeOptional

Output aspect ratio.

Default1:14:33:416:99:162:33:221:9
resolutionOptional

Output resolution; all tiers have the same price.

Default1K1.5K2K
output_formatOptional

When omitted, the model selects the format.

jpegpng
enable_safety_checkerOptional

Enable content safety checking.

Defaulttruefalse

How to Use

  1. Write your scene promptDescribe the subject, artistic style, lighting and composition. If the image needs text, put the exact wording in double quotes and specify the font style.

  2. Choose an aspect ratio and resolutionSelect one of 8 aspect ratios, such as 1:1, 16:9 or 9:16, to suit your target platform, then choose 1K, 1.5K or 2K resolution.

  3. Configure the output format and safety settingsOptionally select jpeg or png output, and keep or adjust the content safety checker, which defaults to true.

  4. Confirm the cost and click RunCheck the fixed charge of 4 credits ($0.020) per request, then click Run in the action bar to submit the asynchronous image generation task.

  5. Preview and download your imageAfter generation finishes in approximately 30 seconds, view the high-definition result in the output panel on the right. Open a fullscreen preview, copy the link or download the image directly.

Pricing

One image per request, fixed at 4 credits ($0.020). 1 credit = $0.005.

UsageRateDetails
1K4 credits / image$0.020 / image
1.5K4 credits / image$0.020 / image
2K4 credits / image$0.020 / image

Best Use Cases

  • E-commerce and commercial advertising assetsQuickly generate product concepts and promotional posters in batches for bags, watches, cosmetics and more. Use text rendering to create commercial visuals with slogans directly in the image.

  • Game concept art and storyboard sketchesProduce a wide range of initial ideas for characters, environments and props. Fast generation helps art teams validate directions during brainstorming.

  • Visual covers for social media platformsSwitch between horizontal 16:9, vertical 9:16 and square 1:1 formats to create covers with a consistent style for social posts, short videos and podcast posters.

  • Multilingual brand typographyCreate multilingual visuals with Chinese and English signs, logos and packaging text for international marketing and overseas social media campaigns.

Pro Tips

  • Build prompts in the order of subject + style + lighting and atmosphere + composition and viewpoint + material details. A clear hierarchy helps the model understand your intent.
  • For text within an image, enclose the exact wording in double quotes, such as "Summer Sale", and specify the font style and placement.
  • Avoid stacking vague modifiers such as cinematic or flawless. Use concrete industrial or photographic terms such as shallow depth of field, soft window light or matte titanium.
  • 1K and 2K cost exactly the same. For final assets, choose 2K directly to achieve richer, finer textures.
  • When creating a series of images, keep the style instructions at the start of the prompt consistent and change only the main subject and action for a more unified visual identity.

Notes

  • Seedream 5.0 Flash is an image generation model focused on still images. It does not support video generation.
  • Each request generates 1 image and costs 4 credits ($0.020) at every resolution, with clear, transparent pricing.
  • Prompts support up to 5,000 Unicode characters, including Chinese, English and mixed-language descriptions.
  • Tasks run asynchronously. After submission, wait for automatic updates in the console or poll the task ID through the API to retrieve the completed result.

Related Models

Seedream 5.0 Flash Text to Image API Frequently Asked Questions

What is the Seedream 5.0 Flash Text to Image API?

Seedream 5.0 Flash Text to Image is a fast, lightweight text-to-image model developed by ByteDance. It quickly generates commercial-quality images at 1K to 2K resolution from text prompts, with precise multilingual text layout, strong prompt adherence and 8 flexible aspect ratios. Its deeply optimized diffusion transformer architecture preserves coherent subject structure and realistic lighting while delivering industry-leading generation times measured in seconds. Call it programmatically through the API or try it directly in the playground above.

Does generating 2K images with Seedream 5.0 Flash Text to Image cost extra?

No. Seedream 5.0 Flash offers affordable, transparent pricing across all resolution tiers. Every request at 1K, 1.5K or 2K costs a fixed 4 credits ($0.020). Even the highest 2K quality setting carries no additional charge.

How long does Seedream 5.0 Flash Text to Image typically take to generate an image?

Under a standard workload, the median generation time is approximately 27 to 31 seconds per image. Compared with the Pro tier, Flash is optimized for high-concurrency batch tasks and rapid creative iteration, significantly reducing waiting time in your workflow.

Can Seedream 5.0 Flash Text to Image render specific text within an image?

Yes. Seedream 5.0 Flash has dedicated training for character shapes and text layout. Enclose the desired words in double quotes, such as "Autumn Collection", and describe the intended setting or style, such as a sign, poster or calligraphy sheet, to generate clear, neatly rendered lettering.

Which aspect ratios does Seedream 5.0 Flash Text to Image support?

The endpoint natively supports 8 common aspect ratios: square 1:1, classic horizontal 4:3 and 16:9, vertical 3:4 and 9:16, photographic 3:2 and 2:3, and ultrawide 21:9. See the parameter table on this page for the full list and default value.

What is the maximum prompt length for Seedream 5.0 Flash Text to Image?

Each prompt supports up to 5,000 Unicode characters. The model understands both Chinese and English well, so you can include detailed composition instructions, lighting, atmosphere and material descriptions without deliberately simplifying your prompt.

How do I choose between the Seedream 5.0 Flash text-to-image and image editing endpoints?

Choose Seedream 5.0 Flash Text to Image when you have a text idea and want to create a new concept from scratch. If you already have reference images, such as product photos, model portraits or a specific scene, and need to preserve the subject, combine faces and clothing or replace a background, choose Seedream 5.0 Flash Image Edit.