--- title: "Seedream 4.5: Specs, Strengths & Prompt Tips | imaginary.app" description: "Seedream 4.5 is ByteDance’s high-resolution image model for posters, brand visuals and product pages. What it does well, how to prompt it, and its limits." url: https://www.imaginary.app/models/seedream-4-5 --- Updated November 2026 # Seedream 4.5 Seedream 4.5 is ByteDance’s December 2025 image model, built for high-resolution commercial visuals such as posters, product pages and brand key art, with sharper small text than its predecessor. It is a strong all-rounder when you want a polished, designed-looking composition rather than a raw photo. Key takeaways - Announced by BytePlus, ByteDance’s enterprise platform, on December 3, 2025 as a refinement of Seedream 4.0. - ByteDance highlights clearer small text, dense text rendering and “designer-level composition and typography” for posters and logos. - Generates at large sizes by default: fal’s endpoint defaults to 2048×2048 and accepts up to 4096×4096. - ByteDance has since released Seedream 5.0 models; 4.5 is no longer the newest Seedream. ByteDance Generate with Seedream 4.5 Write a prompt, pick Seedream 4.5, choose your settings and see the credit cost before you start. Failed generations return their credits. [Open the generator](https://www.imaginary.app/generate)[View Pricing](https://www.imaginary.app/pricing) Sign in with Google to create an account; buy credits only when you need them. ## On imaginary.app These are the settings our generator offers for Seedream 4.5 right now, read from our live model catalog. - Type Image, from a text prompt - Resolutions 2K - Aspect ratios 16:9, 9:16, 1:1 - Starting price 0.33 credits (about $0.07–$0.08) at the lowest settings (2K, 16:9) The generator shows the exact credits for your settings before you start. USD ranges depend on which [pack or plan](https://www.imaginary.app/pricing) you bought credits with. If a generation fails, or you cancel it before it starts, its credits go back to your balance. Very rarely, when we can't confirm with the provider whether a generation finished, the credits stay reserved while we check, rather than being charged. Models other than Veo 3.1 need an account that has bought a credit pack or plan, and they have daily usage limits, per account and across the site: if one is reached, the generator tells you and you can try again the next day (limits reset at midnight UTC). ## Designed layouts, not just pictures ByteDance’s Seed page frames Seedream 4.5 around commercial design work: posters, brand visuals, e-commerce product displays, SaaS promotional images, invitations and beauty key visuals. Its showcase prompts read like creative briefs, with headline copy, product placement and a mood. That is where the model is distinctive: it tends to compose a whole layout, with hierarchy and negative space, rather than a single centred subject. ## Small text that stays readable BytePlus says small-text clarity and facial rendering “receive marked improvements, including cases where subjects occupy very small portions of a scene”, and the Seed page says poster layouts and small text remain clear and readable. In practice this makes Seedream 4.5 a reasonable choice for a poster with a headline and a short tagline, or a product shot with a legible label. It is not a page-layout tool, so keep copy short. ## High resolution as the baseline Seedream 4.5 works at large sizes by default: on fal, each side must be at least 1920 pixels (or the total at least 2560×1440), and BytePlus describes stylised 4K output. The extra pixels show in fabric, packaging and architectural detail, which helps when an image will be cropped or printed. ## Seedream 4.5 specs from ByteDance What ByteDance and its API partners document for the model itself. A maker spec is not always a setting our generator offers: what you can choose on imaginary.app is listed in the block above. | Spec | As documented | Source | | ------------------------------ | -------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------- | | Release | Announced December 3, 2025 by BytePlus; open beta on BytePlus ModelArk at launch | [BytePlus (ByteDance) — Seedream 4.5 announcement, December 3, 2025](https://www.byteplus.com/en/blog/seedream4-5) | | Architecture | Image generation and image editing in “a single, unified architecture” | [fal — Seedream 4.5 text-to-image model page](https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image) | | Output size (fal) | Default 2048×2048; minimum about 2560×1440 total pixels; maximum 4096×4096 | [fal — Seedream 4.5 text-to-image API schema](https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image/api) | | Maximum quality | BytePlus describes “stylized 4K output” | [BytePlus (ByteDance) — Seedream 4.5 announcement, December 3, 2025](https://www.byteplus.com/en/blog/seedream4-5) | | Text rendering | Enhanced typography and dense text rendering; small text in poster layouts stays readable | [ByteDance Seed — Seedream 4.5](https://seed.bytedance.com/en/seedream4_5) | | Multi-image references (maker) | Multi-image composition with up to 10 reference images | [BytePlus (ByteDance) — Seedream 4.5 announcement, December 3, 2025](https://www.byteplus.com/en/blog/seedream4-5) | | Evaluation | ByteDance cites its internal MagicBench (radar charts, no published scores) for prompt adherence, alignment and aesthetics | [ByteDance Seed — Seedream 4.5](https://seed.bytedance.com/en/seedream4_5) | | Successors | Seedream 5.0 Lite (February 24, 2026); fal also lists a Seedream 5.0 Pro endpoint | [BytePlus — Seedream 5.0 Lite announcement, February 24, 2026](https://www.byteplus.com/en/blog/seedream5-0-lite) | ## Who Seedream 4.5 is for ### Good fit - Posters, flyers and social graphics with a short headline and tagline. - E-commerce hero images and product pages where packaging and materials need to look crisp. - Brand key visuals and campaign concepts with a deliberate layout. - Images that will be cropped, reframed or printed, thanks to the large native size. ### Look elsewhere if - Long paragraphs of text or multilingual copy that must be exact. - Quick throwaway drafts; a faster, smaller model is better value for exploration. - Editing an existing photo or combining reference images; on imaginary.app Seedream 4.5 is text-to-image only. ## Prompt tips for Seedream 4.5 Write it like a creative brief: the product or subject, the layout, the copy and the mood. Seedream responds well to design vocabulary such as “hero layout”, “negative space at the top” or “centred product with headline above”. Example prompt (written by us) ``` Minimalist poster for a summer jazz festival: a single golden saxophone silhouette on a deep teal background, large headline "BLUE NIGHTS" at the top in bold condensed sans-serif, small line "July 12 · Riverside Park" at the bottom, generous negative space ``` Put the exact words in quotation marks and keep each block short: a headline of two to four words and one short supporting line. Name where each block sits. For product imagery, describe materials and light precisely. The large output size rewards detail like “brushed aluminium”, “frosted glass” or “soft rim light”. Example prompt (written by us) ``` E-commerce hero image of a frosted glass perfume bottle with a brushed gold cap on a sculpted sand-coloured plinth, soft rim light, warm beige backdrop, subtle reflection, premium beauty campaign style ``` Choose the aspect ratio for the final placement before you write the layout. A 9:16 story and a 16:9 banner need different compositions, so say “vertical poster” or “wide banner” in the prompt too. ## Limitations - Text is improved but not exact: long sentences, very small print and non-Latin scripts can still contain errors. Proofread every image. - Its large default output is more than a rough sketch needs; for bulk ideation, a smaller and faster model such as FLUX Schnell is a better fit. - ByteDance’s editing, multi-image fusion and sequential generation features are not offered on imaginary.app. - ByteDance publishes benchmark charts from its own internal MagicBench without numeric scores, so there is no independent quality ranking to rely on. - Newer Seedream 5.0 models exist; Seedream 4.5 is the version this page covers. - Seedream 4.5 is made by ByteDance; imaginary.app is not affiliated with ByteDance. ## Related models - [FLUX.2 Pro](https://www.imaginary.app/models/flux-2-pro) - [Nano Banana 2](https://www.imaginary.app/models/nano-banana-2) - [Ideogram 4.5](https://www.imaginary.app/models/ideogram-4-5) - [Every model on imaginary.app](https://www.imaginary.app/models) - [AI image generator overview](https://www.imaginary.app/ai-image-generator) ## Frequently asked questions ### Is Seedream 4.5 free? Seedream 4.5 is a commercial model offered through BytePlus ModelArk and API partners such as fal. On imaginary.app it uses credits, and the starting cost is shown on this page. ### What resolution does Seedream 4.5 generate? On fal, Seedream 4.5 defaults to 2048×2048 and accepts sizes up to 4096×4096, and BytePlus describes 4K output. The sizes offered on imaginary.app are listed in the block on this page. ### Can Seedream 4.5 put text on images? Yes, within limits. ByteDance says it improved typography and dense text rendering, and short headlines and labels usually come out readable. Keep copy short, put it in quotes, and check spelling before using the image. ### Seedream 4.5 vs Seedream 5.0: which is newer? Seedream 5.0 is newer. BytePlus announced Seedream 5.0 Lite on February 24, 2026, and fal lists a Seedream 5.0 Pro endpoint. This page covers Seedream 4.5, the version offered here. ## Sources Prices, model specs and dates on this page were checked on November 10, 2026. Third-party prices change; check the source before you rely on a number. - [BytePlus (ByteDance) — Seedream 4.5 announcement, December 3, 2025](https://www.byteplus.com/en/blog/seedream4-5) - [ByteDance Seed — Seedream 4.5](https://seed.bytedance.com/en/seedream4_5) - [fal — Seedream 4.5 text-to-image model page](https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image) - [fal — Seedream 4.5 text-to-image API schema](https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image/api) - [BytePlus — Seedream 5.0 Lite announcement, February 24, 2026](https://www.byteplus.com/en/blog/seedream5-0-lite) - [fal — Seedream 5.0 Pro text-to-image](https://fal.ai/models/bytedance/seedream/v5/pro/text-to-image) - [imaginary.app pricing](https://www.imaginary.app/pricing) How we checked: model specs come from ByteDance's and its API partners' pages listed above; the imaginary.app settings and starting price come from our live model catalog. Example prompts are ours, not ByteDance's. Commercial use: licence and usage terms for Seedream 4.5 are set by ByteDance. Check them, and our [Terms of Service](https://www.imaginary.app/terms-of-service), before you publish what you make. ByteDance ## Try Seedream 4.5 on your own prompt One account and one credit balance for Seedream 4.5, every other image model we offer, and Veo 3.1 video. The price shows before you generate. [Open the generator](https://www.imaginary.app/generate)[View Pricing](https://www.imaginary.app/pricing) Sign in with Google to create an account; buy credits only when you need them.