# Seedream 4.5 > ByteDance's latest image generation model unifying text-to-image and image editing in a single architecture, with improved text rendering and 30-40% faster generation than v4.0 ## Quick Reference - Model ID: seedream-4.5 - Creator: ByteDance - Status: active - Family: seedream - Base URL: https://api.lumenfall.ai/openai/v1 ## Specifications - Max Resolution: 4096x4096 - Input Modalities: text, image - Output Modalities: image - Supported Modes: Text to Image, Image Edit ## API Parameters The compiled parameter schema for this model is available via the API: `GET /v1/models/seedream-4.5?schema=true`. ### Core Parameters - `prompt` (string) — REQUIRED: Text prompt for image generation. Modes: Text to Image, Image Edit - `seed` (integer): Random seed for reproducibility. Modes: Text to Image, Image Edit ### Size & Layout - `size` (string): Image dimensions as WxH pixels (e.g. "1024x1024") or aspect ratio (e.g. "16:9"). Values: auto, 1024x1024. Modes: Text to Image, Image Edit - `aspect_ratio` (string): Aspect ratio of the output image (e.g. "16:9", "1:1"). Values: auto, 1:1. Modes: Text to Image, Image Edit - `resolution` (string): Output resolution tier (e.g. "1K", "4K"). Values: auto, 1K. Modes: Text to Image, Image Edit ### Media Inputs - `image` (file) — REQUIRED: Input image(s) to edit. Modes: Image Edit ### Output & Format - `response_format` (string): How generated images are returned.. Default: url. Values: b64_json, url. Modes: Text to Image, Image Edit. Only available via byteplus - `output_format` (string): Output image format. Values: png, jpeg, gif, webp, avif. Modes: Text to Image, Image Edit - `output_compression` (integer): Compression level for lossy formats (JPEG, WebP, AVIF). Modes: Text to Image, Image Edit - `n` (integer): Number of images to generate. Default: 1. Modes: Text to Image, Image Edit ### Additional Parameters - `prompt_enhancement` (string): Whether an LLM rewrites/expands the prompt before generation (off, on). Values: off, on. Modes: Text to Image, Image Edit - `disable_safety_checker` (boolean): Disable the safety checker for generated images. When enabled, input moderation is relaxed to only block illegal content (CSAM). Use responsibly.. Modes: Text to Image, Image Edit. Only available via replicate - `enable_safety_checker` (boolean): If set to true, the safety checker will be enabled.. Modes: Image Edit, Text to Image. Only available via fal - `sequential_image_generation` (string): Controls batch image generation; `disabled` returns one image and `auto` lets the model decide whether and how many images to return.. Values: disabled. Modes: Text to Image, Image Edit - `sequential_image_generation_options` (object): Batch image generation options, effective only when sequential_image_generation is auto.. Modes: Text to Image, Image Edit. Only available via byteplus - `stream` (boolean): Whether to stream each output image as soon as it is generated.. Modes: Text to Image, Image Edit. Only available via byteplus - `sync_mode` (boolean): If `True`, the media will be returned as a data URI and the output data won't be available in the request history.. Modes: Image Edit, Text to Image. Only available via fal - `watermark` (boolean): Whether to add an AI-generated watermark to the lower-right corner of the image.. Modes: Text to Image, Image Edit. Only available via byteplus ## Model Identifiers - Primary Slug: seedream-4.5 - Aliases: seedream-4-5 ## Dates - Released: December 2025 ## Tags image-generation, text-to-image, image-editing ## Available Providers ### BytePlus - Config Key: byteplus/seedream-4.5 - Provider Model ID: seedream-4-5 - Pricing: $0.040/image - Source: https://docs.byteplus.com/en/docs/ModelArk/1544106 ### fal.ai - Config Key: fal/seedream-4.5-edit - Provider Model ID: fal-ai/bytedance/seedream/v4.5/edit - Pricing: $0.040/image - Source: https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image ### fal.ai - Config Key: fal/seedream-4.5 - Provider Model ID: fal-ai/bytedance/seedream/v4.5/text-to-image - Pricing: $0.040/image - Source: https://fal.ai/models/fal-ai/bytedance/seedream/v4.5/text-to-image ### Replicate - Config Key: replicate/seedream-4.5 - Provider Model ID: bytedance/seedream-4.5 - Pricing: $0.040/image - Source: https://replicate.com/bytedance/seedream-4.5 ## Performance Metrics Provider performance over the last 30 days. ### fal - Median Generation Time (p50): 21712ms - 95th Percentile Generation Time (p95): 41263ms - Average Generation Time: 23965ms - Success Rate: 100.0% - Total Requests: 47 - Time to First Byte (p50): 20294ms - Time to First Byte (p95): 40361ms ### replicate - Median Generation Time (p50): 22476ms - 95th Percentile Generation Time (p95): 41262ms - Average Generation Time: 22825ms - Success Rate: 83.3% - Total Requests: 48 - Time to First Byte (p50): 22270ms - Time to First Byte (p95): 40771ms ## Arena Benchmarks ### Isometric Miniature Diorama Scenes - Elo: 1283 - Record: 24W / 9L / 4T (37 battles) - Rank: #2 of 72 ### Geometric Composition - Elo: 1271 - Record: 11W / 4L / 0T (15 battles) - Rank: #4 of 70 ### Golden Hour Stroll - Elo: 1265 - Record: 33W / 9L / 1T (43 battles) - Rank: #2 of 45 ### Studio Ghibli Anime Style - Elo: 1259 - Record: 29W / 13L / 1T (43 battles) - Rank: #3 of 46 ### Neutral Expression to Genuine Smile - Elo: 1244 - Record: 18W / 11L / 2T (31 battles) - Rank: #4 of 14 ### Heroic Super Hero Portrait - Elo: 1240 - Record: 12W / 5L / 1T (18 battles) - Rank: #4 of 21 ### Over-the-top cartoon caricature - Elo: 1233 - Record: 24W / 17L / 4T (45 battles) - Rank: #4 of 44 ### Man and Car in California - Elo: 1223 - Record: 34W / 74L / 6T (114 battles) - Rank: #10 of 35 ### Candid Street Photography - Elo: 1206 - Record: 19W / 7L / 3T (29 battles) - Rank: #13 of 68 ### Apollo 11: Journey to Tranquility - Elo: 1200 - Record: 18W / 14L / 0T (32 battles) - Rank: #12 of 70 ### Modern Clean Menu - Elo: 1197 - Record: 11W / 14L / 4T (29 battles) - Rank: #13 of 69 ### Bald man challenge - Elo: 1196 - Record: 17W / 14L / 5T (36 battles) - Rank: #11 of 43 ### Intricate Floral Mandala - Elo: 1195 - Record: 14W / 9L / 1T (24 battles) - Rank: #8 of 15 ### Vintage Cafe Logo - Elo: 1179 - Record: 15W / 11L / 3T (29 battles) - Rank: #15 of 70 ### Chalkboard Menu - Elo: 1175 - Record: 5W / 1L / 0T (6 battles) - Rank: #8 of 69 ### The Reversed Rodeo - Elo: 1171 - Record: 3W / 0L / 1T (4 battles) - Rank: #5 of 68 ### Adorable Baby Animals in Sunny Meadow - Elo: 1166 - Record: 10W / 5L / 2T (17 battles) - Rank: #20 of 72 ### Victorian Greenhouse Oasis - Elo: 1154 - Record: 10W / 7L / 1T (18 battles) - Rank: #15 of 17 ### Night Sky Transformation - Elo: 1152 - Record: 13W / 16L / 2T (31 battles) - Rank: #14 of 16 ### The Capybara Taxi Driver - Elo: 1150 - Record: 3W / 1L / 1T (5 battles) - Rank: #11 of 69 ### Magic Burger Explosion: Fiery Photorealism Challenge - Elo: 1140 - Record: 7W / 3L / 0T (10 battles) - Rank: #15 of 69 ### The Halloween Invitation - Elo: 1117 - Record: 2W / 3L / 0T (5 battles) - Rank: #19 of 70 ## Use Cases & Category Performance ### 3D Imaging & Modeling (Text-to-Image) - Rank: #1 of 45 - Elo: 1282 - Record: 35W / 13L / 4T (52 battles) - Win Rate: 67.3% ### Creativity (Text-to-Image) - Rank: #8 of 62 - Elo: 1244 - Record: 63W / 37L / 8T (108 battles) - Win Rate: 58.3% ### Aesthetics (Text-to-Image) - Rank: #8 of 62 - Elo: 1254 - Record: 106W / 57L / 18T (181 battles) - Win Rate: 58.6% ### People & Poses (Image Editing) - Rank: #3 of 18 - Elo: 1239 - Record: 33W / 12L / 1T (46 battles) - Win Rate: 71.7% ### Prompt Adherence (Text-to-Image) - Rank: #8 of 61 - Elo: 1257 - Record: 92W / 51L / 12T (155 battles) - Win Rate: 59.4% ### Text Rendering (Text-to-Image) - Rank: #9 of 61 - Elo: 1240 - Record: 82W / 55L / 11T (148 battles) - Win Rate: 55.4% ### Photorealism (Text-to-Image) - Rank: #9 of 62 - Elo: 1228 - Record: 59W / 21L / 7T (87 battles) - Win Rate: 67.8% ### Artistic Restyling (Image Editing) - Rank: #3 of 15 - Elo: 1229 - Record: 52W / 29L / 5T (86 battles) - Win Rate: 60.5% ### Creativity (Image Editing) - Rank: #3 of 15 - Elo: 1229 - Record: 52W / 29L / 5T (86 battles) - Win Rate: 60.5% ### Art (Text-to-Image) - Rank: #6 of 31 - Elo: 1208 - Record: 5W / 3L / 1T (9 battles) - Win Rate: 55.6% ### Product, Branding & Commercial (Text-to-Image) - Rank: #12 of 61 - Elo: 1237 - Record: 58W / 46L / 7T (111 battles) - Win Rate: 52.3% ### Prompt Adherence (Image Editing) - Rank: #6 of 24 - Elo: 1215 - Record: 24W / 19L / 4T (47 battles) - Win Rate: 51.1% ### Preservation (Image Editing) - Rank: #9 of 33 - Elo: 1211 - Record: 155W / 140L / 19T (314 battles) - Win Rate: 49.4% ### Photorealism (Image Editing) - Rank: #8 of 28 - Elo: 1220 - Record: 116W / 124L / 16T (256 battles) - Win Rate: 45.3% ### Face & Identity (Image Editing) - Rank: #7 of 17 - Elo: 1218 - Record: 58W / 41L / 11T (110 battles) - Win Rate: 52.7% ### Aesthetics (Image Editing) - Rank: #7 of 17 - Elo: 1224 - Record: 96W / 96L / 8T (200 battles) - Win Rate: 48.0% ### Lighting, Shadows & Materials (Image Editing) - Rank: #14 of 30 - Elo: 1224 - Record: 98W / 116L / 14T (228 battles) - Win Rate: 43.0% ### Adding & Editing Objects (Image Editing) - Rank: #10 of 19 - Elo: 1198 - Record: 35W / 74L / 6T (115 battles) - Win Rate: 30.4% ### Backgrounds & Scenes (Image Editing) - Rank: #13 of 16 - Elo: 1215 - Record: 47W / 90L / 8T (145 battles) - Win Rate: 32.4% ## Image Gallery 27 images available for this model. Browse all at https://lumenfall.ai/models/bytedance/seedream-4.5/gallery ### Curated Examples - [A grand, cinematic wide shot of a master calligrapher’s studio floating in a celestial void, wher...](https://assets.lumenfall.ai/GZ8FwPp_IFMxh_1yZAJpbwJjud0sf-q1HLt0VQWNsY4/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/w2q4k1n2by00qp3ag5f6wjj0avvl@jpeg) - [A cinematic, wide 16:9 shot of a high-end coastal boutique hotel at dusk. The building features w...](https://assets.lumenfall.ai/iFpzSafyNRM-IT9fU-dpix_oZnCq3IJokrxwBiS9_dE/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/9zffkshawhwiudgwvhf22uiduyma@jpeg) - [A hyper-realistic close-up portrait of an elderly artisan woodworker in a sun-drenched workshop. ...](https://assets.lumenfall.ai/8tpeDsdC894eviWUw245DUH_cQtVPo4JZZ5fWzj-u58/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/se5o1vivcr2we0s1ks7xqp0hiwwb@jpeg) - [A hyper-realistic close-up of an elderly artisan’s weathered hands meticulously carving a delicat...](https://assets.lumenfall.ai/rcxmRaNIIHagGEvupDh6amejI_LWOsOsMGMDimGUZzI/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/h4qvxmxkjryishujlsnokq9iexfk@jpeg) - [A vibrant, hand-painted wooden sign for a "SUNSET BAKERY" hanging over a cozy storefront. The typ...](https://assets.lumenfall.ai/53ZsMCY93D1vfJUAVt1Rc7-vym11H1d_pdd4osXVmt8/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/8kazwokrrk04frs1zjf4sey4pltc@jpeg) ### Arena Competition Results - [Isometric Miniature Diorama Scenes](https://assets.lumenfall.ai/tIgVYoMqwfk45FEqHyhrd0ju7S6JaDYeMU3LVc0U4mA/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/x500dd5bvmy6ys3puhsnx48t85bc@jpeg): #2 of 72 (Elo 1283) - [Geometric Composition](https://assets.lumenfall.ai/gmw3g-80J3K_TgcBpkAe2PCwEgOyclG2e5A6p3PtI9U/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/iuq11nlc8vq6owu2g2uor23fwbom@jpeg): #4 of 70 (Elo 1271) - [Golden Hour Stroll](https://assets.lumenfall.ai/HGEjJFnMjbO6H7e9L3PTKtnxhmoYJD5OeNdz9svq9kE/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/n29b62le5hui9swg8fvrsqmoalln@jpeg): #2 of 45 (Elo 1265) - [Studio Ghibli Anime Style](https://assets.lumenfall.ai/CPaI-RsFzs2Y0OjhOs0-Nuiq3H442xyUOsmCmQ1NUvc/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/f4qgtra5lxz7s140nknuduupa6wj@jpeg): #3 of 46 (Elo 1259) - [Neutral Expression to Genuine Smile](https://assets.lumenfall.ai/QmeoXNpOJzevI4XkZIcyCvifIm79fhYCdS2w_PMivGI/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/urtazajh7o3hds94iyzjd5b4ayjh@jpeg): #4 of 14 (Elo 1244) - [Heroic Super Hero Portrait](https://assets.lumenfall.ai/YrRtmUxt5ymStTBnBF685b6NbkN5MlPX2q5wJK2vZWY/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/z27kr2zptlkbqpfcebkjmu8c5m77@jpeg): #4 of 21 (Elo 1240) - [Over-the-top cartoon caricature](https://assets.lumenfall.ai/LBJjZ5p79qPDgTY-TSzsQH7LCRkxe4b_n8RUwjyfO4I/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/y3jsfonmoof3zr48snbolbzh61eq@jpeg): #4 of 44 (Elo 1233) - [Man and Car in California](https://assets.lumenfall.ai/LNYTsaU1QqyDxk0yrXHRkeCsMIt8rd525i9m7BOfApQ/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/v2tzlgf44ymo83lgh9nn57m0yznd@jpeg): #10 of 35 (Elo 1223) - [Candid Street Photography](https://assets.lumenfall.ai/7VOu-BDhVnhOMTAXnfHTUIKqO8edsO_TNKa_DbPbQgM/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/jkwlehpy38zi287fuykty2bi89eu@jpeg): #13 of 68 (Elo 1206) - [Apollo 11: Journey to Tranquility](https://assets.lumenfall.ai/1HK8GwiIJba7aNc7b4lLVNcn6m1UR4-itZ7RXf5FD4s/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/snwinhvxzi79kznoa20na03l0dnf@jpeg): #12 of 70 (Elo 1200) - [Modern Clean Menu](https://assets.lumenfall.ai/QupHx__ILdZ-nxrJgXonTN0YALuyq68tMxbGtuAII9g/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/8idgmaeh1fellirzvgi0gym71cs7@jpeg): #13 of 69 (Elo 1197) - [Bald man challenge](https://assets.lumenfall.ai/yZTwuaCBr0gFSbzQSvdi5erOxFfUNelzxJdkbXisTpk/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/81alr1gfybqvs2e84pjc55fzsupv@jpeg): #11 of 43 (Elo 1196) - [Intricate Floral Mandala](https://assets.lumenfall.ai/2f6I2DsfkEV6hWJyM30hr5KjirrEgVVhIxwb9YKVOuc/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/44n01ekr6us0c4w3f676ligb2nkd@jpeg): #8 of 15 (Elo 1195) - [Vintage Cafe Logo](https://assets.lumenfall.ai/nH8Kz6VjJJgfQ8FEFCBZBISKYMDYVsscUvp7Rza7dkY/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/xbwk2qkzk01hl3j1kf9ykrcnsyuz@jpeg): #15 of 70 (Elo 1179) - [Chalkboard Menu](https://assets.lumenfall.ai/AfNj3cm2wsIaO05ppZj_kia-SA8caAhJGxChTcMslH4/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/12fvm0990400hnjb3goq9g46sjpp@jpeg): #8 of 69 (Elo 1175) - [The Reversed Rodeo](https://assets.lumenfall.ai/CfsmYY2FE6HQ173Vrr7FoH7bXTIVE3vQbtwzIy4YgAY/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/ujnozook4305aflbj8bg5dms5e68@jpeg): #5 of 68 (Elo 1171) - [Adorable Baby Animals in Sunny Meadow](https://assets.lumenfall.ai/SUtE3hvOmZfwIl-PtrnIvYXYk5lZ1GDSNvaMtFMIGZg/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/2b7vbfjdzea4pb0kkl8pviyivuv3@jpeg): #20 of 72 (Elo 1166) - [Victorian Greenhouse Oasis](https://assets.lumenfall.ai/wi9PCnU68YqETk4Sfan9gsk2PnwcgDMfRuq1-bK8DgU/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/w2qao527u1ns5cffwh4bdc6ltxa3@jpeg): #15 of 17 (Elo 1154) - [Night Sky Transformation](https://assets.lumenfall.ai/b1GaC3q9SRYCEO4DdUwzQLbDcXYW3PgDtsJjkvloOZM/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/5w8b2u4ooyvt18oe4qzu8x14vkrf@jpeg): #14 of 16 (Elo 1152) - [The Capybara Taxi Driver](https://assets.lumenfall.ai/xuaEqFB4qsphxCdrXiOBPV2uwbcWcg1vFS2an1v1xL0/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/y8srthw57h5cxsxtqaw1twocijf6@jpeg): #11 of 69 (Elo 1150) - [Magic Burger Explosion: Fiery Photorealism Challenge](https://assets.lumenfall.ai/DN2S2Mzmg-vv_RrFVGD4gu1pdDcYJzEv-a_Omlp6L5U/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/20ne1f0utvkvkhd3taqiyiielr36@jpeg): #15 of 69 (Elo 1140) - [The Halloween Invitation](https://assets.lumenfall.ai/yCnAdFbzclVDQkPCmWZOk4vzb_Lkjm5r5ye8GlOHris/rs:fit:1500:1500/plain/gs://lumenfall-prod-assets/j0ataoib8gdotbj714ud6prxspdz@jpeg): #19 of 70 (Elo 1117) ## Example Prompt The following prompt was used to generate an example image in our playground: A vibrant, hand-painted wooden sign for a "SUNSET BAKERY" hanging over a cozy storefront. The typography is elegant gold leaf script. In the soft-focus background, a capybara sits peacefully on the sidewalk, nibbling on a stray baguette. ## Code Examples ### Text to Image (/v1/images/generations) #### cURL curl -X POST \ https://api.lumenfall.ai/openai/v1/images/generations \ -H "Authorization: Bearer $LUMENFALL_API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "seedream-4.5", "prompt": "", "size": "1024x1024" }' # Response: # { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] } #### JavaScript import OpenAI from 'openai'; const client = new OpenAI({ apiKey: 'YOUR_API_KEY', baseURL: 'https://api.lumenfall.ai/openai/v1' }); const response = await client.images.generate({ model: 'seedream-4.5', prompt: '', size: '1024x1024' }); // { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] } console.log(response.data[0].url); #### Python from openai import OpenAI client = OpenAI( api_key="YOUR_API_KEY", base_url="https://api.lumenfall.ai/openai/v1" ) response = client.images.generate( model="seedream-4.5", prompt="", size="1024x1024" ) # { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] } print(response.data[0].url) ### Image Edit (/v1/images/edits) #### cURL curl -X POST \ https://api.lumenfall.ai/openai/v1/images/edits \ -H "Authorization: Bearer $LUMENFALL_API_KEY" \ -F "model=seedream-4.5" \ -F "image=@source.png" \ -F "prompt=Add a starry night sky to this image" \ -F "size=1024x1024" # Response: # { "created": 1234567890, "data": [{ "url": "https://...", "revised_prompt": "..." }] } #### JavaScript import OpenAI from 'openai'; import fs from 'fs'; const client = new OpenAI({ apiKey: 'YOUR_API_KEY', baseURL: 'https://api.lumenfall.ai/openai/v1' }); const response = await client.images.edit({ model: 'seedream-4.5', image: fs.createReadStream('source.png'), prompt: 'Add a starry night sky to this image', size: '1024x1024' }); // { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] } console.log(response.data[0].url); #### Python from openai import OpenAI client = OpenAI( api_key="YOUR_API_KEY", base_url="https://api.lumenfall.ai/openai/v1" ) response = client.images.edit( model="seedream-4.5", image=open("source.png", "rb"), prompt="Add a starry night sky to this image", size="1024x1024" ) # { created: 1234567890, data: [{ url: "https://...", revised_prompt: "..." }] } print(response.data[0].url) ## About ## Overview Seedream 4.5 is the latest image generation model developed by ByteDance, designed to bridge the gap between initial creation and iterative modification. It utilizes a unified architecture that handles both text-to-image synthesis and image editing tasks within the same framework, rather than relying on separate modular adapters. This version focuses specifically on increasing throughput and improving the legibility of embedded text compared to its predecessors. ## Strengths * **Unified Architecture:** Unlike models that require specific Inpaint or Instruct-pix2pix checkpoints, Seedream 4.5 manages text-prompted generation and image-to-image editing natively in one model. * **In-Image Typography:** The model shows high accuracy in rendering complex text strings, logos, and labels within generated scenes, minimizing the common "gibberish" artifacts found in earlier diffusion iterations. * **Generation Latency:** ByteDance has optimized the inference pipeline to be 30-40% faster than Seedream 4.0, making it more viable for near-real-time applications and rapid prototyping. * **Contextual Editing:** Because it is designed for editing, the model excels at maintaining the global composition and lighting of an original image while adding, removing, or altering specific subjects via text instructions. ## Limitations * **Hardware Demand:** While faster than version 4.0, the unified architecture still requires significant VRAM for high-resolution outputs compared to smaller, distilled models like SDXL Turbo. * **Extreme Realism:** While versatile, the model may still experience the "uncanny valley" effect in human anatomy—specifically hands and complex joint positions—where dedicated photorealism models may have a slight edge. * **Prompt Sensitivity:** To get the most out of the integrated editing features, users often need to provide highly specific instructions to prevent the model from over-altering the base image. ## Technical Background Seedream 4.5 is built on a latent diffusion framework that integrates multimodal inputs (text and reference images) directly into its primary denoising process. By training on a diverse dataset of paired editing sequences, the model learns to treat an input image as a soft spatial constraint rather than a rigid template. This allows for fluid transitions between "generating from scratch" and "modifying existing pixels" without switching model weights. ## Best For Seedream 4.5 is best suited for professional workflows where a user needs to generate a concept and then immediately iterate on specific details, such as changing a character's clothing or adding a specific brand name to a storefront. It is an excellent choice for marketing teams building localized ad assets or developers building interactive design tools. Seedream 4.5 is available for testing and deployment through Lumenfall’s unified API and playground, allowing you to integrate high-speed image generation and editing into your applications with a single integration. ## Frequently Asked Questions ### How much does Seedream 4.5 cost? Seedream 4.5 starts at $0.04 per image through Lumenfall. Pricing varies by provider. Lumenfall does not add any markup to provider pricing. ### How do I use Seedream 4.5 via API? You can use Seedream 4.5 through Lumenfall's OpenAI-compatible API. Send requests to the unified endpoint with model ID "seedream-4.5". Code examples are available in Python, JavaScript, and cURL. ### Which providers offer Seedream 4.5? Seedream 4.5 is available through BytePlus, fal.ai, and Replicate on Lumenfall. Lumenfall automatically routes requests to the best available provider. ### What is the maximum resolution for Seedream 4.5? Seedream 4.5 supports images up to 4096x4096 resolution. ## Links - Model Page: https://lumenfall.ai/models/bytedance/seedream-4.5 - About: https://lumenfall.ai/models/bytedance/seedream-4.5/about - Providers, Pricing & Performance: https://lumenfall.ai/models/bytedance/seedream-4.5/providers - API Reference: https://lumenfall.ai/models/bytedance/seedream-4.5/api - Benchmarks: https://lumenfall.ai/models/bytedance/seedream-4.5/benchmarks - Use Cases: https://lumenfall.ai/models/bytedance/seedream-4.5/use-cases - Gallery: https://lumenfall.ai/models/bytedance/seedream-4.5/gallery - Playground: https://lumenfall.ai/models/bytedance/seedream-4.5/playground - API Documentation: https://docs.lumenfall.ai