Seedance 2.5 Flash API: 2x Faster 30s Video
The Seedance 2.5 Flash API gives developers the faster, lower-cost tier of ByteDance Seed’s Seedance 2.5, released on November 12, 2026. It generates video at nearly twice the speed of Seedance 2.5, renders up to 30 seconds per clip at 480p or 720p, and takes up to 10 images, 5 videos, and 5 audio clips per request, with video editing for quick variants.
Seedance 2.5 Flash is developed by ByteDance. Atlas Cloud (operated by Atlas Cloud AI LLC) provides access to it and does not own it. All trademarks belong to their respective owners.
Explore the Leading Seedance 2.5 Flash
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Seedance 2.5 Flash: Three Paths to Video Creation
Compare text prompts, frame images, and multimodal references to find the right input for your video workflow.
| Modality | Description |
|---|---|
| Seedance 2.5 Flash Text-to-Video API | Turn text prompts into videos lasting 4 to 30 seconds at 480p or 720p with synchronized audio. Generation runs about twice as fast as Seedance 2.5, making this endpoint useful for exploring scene concepts and iterating on creative ideas. |
| Seedance 2.5 Flash Image-to-Video API | A first-frame image guides video generation, with an optional last frame to define the ending. Outputs span 4 to 30 seconds at 480p or 720p with synchronized audio. Use this endpoint for product animations and sequences built around selected opening and closing visuals. |
| Seedance 2.5 Flash Reference-to-Video API | With up to 10 reference images, 5 videos, and 5 audio clips, this endpoint generates, edits, or extends videos lasting 4 to 30 seconds. Outputs support 480p or 720p with synchronized audio. It suits creative work guided by reference assets, footage revisions, and video continuations. |
What the Seedance 2.5 Flash API Keeps at Twice the Speed
Every Seedance 2.5 Flash API request keeps the flagship’s references, editing, and synced audio, so you can test ideas at 480p or 720p and send the winning takes to Seedance 2.5 unchanged.
Close to Seedance 2.5, Twice as Fast
ByteDance rates Flash as the closest match yet to the Seedance 2.5 flagship and stronger overall than Seedance 2.0, while it generates about twice as fast. On Atlas Cloud its token rate is about two thirds of Seedance 2.5, so ad tests, A/B variants, and daily production runs cost less per clip.
A Full 30-Second Take with Sound
Each request returns one continuous clip of any whole-second length from 4 to 30 seconds, or set duration to -1 and let the model choose. Voice, sound effects, and music are generated in sync with the picture, and you can switch audio off when you only need silent footage.
Direct with 20 References
Combine up to 10 images, 5 videos, and 5 audio clips in one call and cite each one in the prompt as @Image1, @Video1, or @Audio1 to lock characters, products, style, and motion. A single music, voice, or sound effect track can also be the only reference and drive pacing, beat cuts, and lip sync.
Edit or Extend Existing Footage
Point the Seedance 2.5 Flash API at a 4 to 30 second clip to change one element, such as a jacket or a background, while the rest of the frame stays intact, or continue the shot forward. Request MOV output in yuv444p to limit quality loss across several editing rounds.
Output for Every Placement
Render natively at 480p or 720p in seven aspect ratios, including 9:16 for vertical feeds, 21:9 for cinematic frames, and adaptive. Choose MP4 or MOV, and return the last frame as a separate image to use as the first frame of the next shot in image to video.
Preview on Flash, Finish on Seedance 2.5
Flash uses the same prompts, @ references, and parameters as Seedance 2.5, so moving a take to the flagship only changes the model ID and resolution. Settle framing, motion, and sound on Flash, then render the approved version in 1080p or 4K on Seedance 2.5.
Seedance 2.5 Flash in Motion: One Prompt, Three Models
Compare Seedance 2.5 Flash, Kling V3.0 Turbo, and Seedance 2.0 through identical video prompts that put movement, visual continuity, and storytelling in focus.
A young chef in a blue apron works a sizzling pancake stall beside a sunlit seaside market. Create a 10-second live-action cinematic comedy with three connected shots. During seconds 0 to 3, track sideways at countertop height as she swirls batter, slides the pan forward, and flips a golden pancake into the air. During seconds 3 to 7, whip pan upward as a sudden sea breeze carries the pancake sideways; she lunges around the counter, keeping her eyes on it, then catches it cleanly in the pan. During seconds 7 to 10, cut to a low frontal angle and dolly backward as she steps forward and slides the pancake onto a waiting plate, only for a seagull to swoop through and steal it. She laughs and immediately spins back toward the stove. Maintain consistent clothing, utensils, and stall geography. Warm sunlight, detailed food textures, believable fabric movement, continuous action at normal speed. Synchronize sizzling, footsteps, a wingbeat, and her surprised laugh with a playful percussion rhythm. 16:9 aspect ratio
Generated with Seedance 2.5 Flash Text-to-Video on Atlas Cloud
Generated with Kling V3.0 Turbo Text-to-Video on Atlas Cloud
Generated with Seedance 2.0 Text-to-Video on Atlas Cloud
A tiny turquoise dragon with copper goggles chases a glowing runaway egg through the rooftops of a floating mountain village at dusk. Render a 10-second fantasy adventure in hand-painted anime style, with expressive character animation and three connected shots. Open with a low tracking shot for seconds 0 to 3 as the dragon sprints across curved roof tiles, its wings pumping while the egg bounces toward the edge. For seconds 3 to 7, cut behind the dragon and dive with it between hanging lanterns; it folds its wings through a narrow arch, then spreads them to catch the falling egg against its chest. During seconds 7 to 10, orbit into a frontal close-up as it climbs above the rooftops. The egg cracks, a smaller dragon pops out and sneezes a sparkling puff into its rescuer's face, and both wobble before flying onward. Preserve character proportions and the egg's markings across cuts. Amber lantern light, violet clouds, flowing scarf movement, no slow motion. Pair rushing wind and fluttering wings with a rising orchestral phrase that resolves on the sneeze. 16:9 aspect ratio
Generated with Seedance 2.5 Flash Text-to-Video on Atlas Cloud
Generated with Kling V3.0 Turbo Text-to-Video on Atlas Cloud
Generated with Seedance 2.0 Text-to-Video on Atlas Cloud
Seedance 2.5 Flash: Faster Iteration from Concept to Campaign
Whether you need ad concepts, animated product photos, or revised campaign footage, Seedance 2.5 Flash supports creative workflows with text prompts, reference media, video editing, and synchronized audio.
Seedance 2.5 Flash Ad Testing
Test video ad concepts with generation running about twice as fast as Seedance 2.5. Compare different prompts before choosing which creative direction to develop for your next product launch or campaign.
Product Photos in Motion
Turn a product photo into a video using the image as your opening frame. Create short product reveals for storefronts, launch announcements, and social posts from assets your team already has.
Seedance 2.5 Flash Story Previews
A text prompt can become a video of up to 30 seconds with synchronized audio. Filmmakers and creative teams can visualize narrative ideas before committing time to shoots or detailed production.
Reference Guided Brand Scenes
Combine image, video, and audio references to guide new scenes with Seedance 2.5 Flash. Build campaign concepts around supplied visual and sound assets for creative reviews, client pitches, or internal presentations.
Social Clips with Sound
Need a short social clip with sound generated alongside the visuals? Describe the scene and use synchronized audio generation to create video content for creator channels, community updates, or brand storytelling.
Campaign Edits and Extensions
Existing footage can be edited or extended through the reference video workflow. Prepare revised campaign clips or longer scene variations for content teams exploring how to reuse material across upcoming releases.
Where Seedance 2.5 Flash Fits in Your Video Stack
Compare Seedance 2.5 Flash with MiniMax and Wan across input guidance, clip length, native resolution, reference capacity, and audio generation to choose a model for your workflow.
| Model | Guidance Inputs | Clip Duration | Native Resolution | Reference Capacity | Audio Generation |
|---|---|---|---|---|---|
| Seedance 2.5 Flash Reference-to-Video | Text, images, video, audio | 4 to 30 seconds | 480p, 720p | Up to 10 images, 5 videos, and 5 audio clips | √ |
| Seedance 2.5 Flash Image-to-Video | Text and a first frame, with an optional last frame | 4 to 30 seconds | 480p, 720p | 1 first frame plus 1 optional last frame | √ |
| Seedance 2.5 Flash Text-to-Video | Text prompt | 4 to 30 seconds | 480p, 720p | - | √ |
| MiniMax H3 Fast Reference-to-Video | Text and mixed image, video, or audio references | 5 to 15 seconds | 480p | Up to 9 images, 3 videos, and 3 audio clips; 12 assets total | √ |
| Wan-3.0-Prime Reference-to-video | Text, images, video, audio; optional document or webpage | 2 to 30 seconds | 480p, 720p, 1080p | Up to 10 images, 5 videos, and 5 audio clips; 20 assets total | √ |
How to Use Seedance 2.5 Flash on Atlas Cloud
Get started in minutes — follow these simple steps to integrate and deploy models through Atlas Cloud's platform.
Create an Atlas Cloud Account
Sign up at atlascloud.ai and complete verification. New users receive free credits to explore the platform and test models.
Why Use Seedance 2.5 Flash on Atlas Cloud
Combining the advanced Seedance 2.5 Flash models with Atlas Cloud's GPU-accelerated platform provides unmatched performance, scalability, and developer experience.
Performance & flexibility
Low Latency:
GPU-optimized inference for real-time reasoning.
Unified API:
Run Seedance 2.5 Flash, GPT, Gemini, and DeepSeek with one integration.
Transparent Pricing:
Predictable per-token billing with serverless options.
Enterprise & Scale
Developer Experience:
SDKs, analytics, fine-tuning tools, and templates.
Reliability:
99.99% uptime, RBAC, and compliance-ready logging.
Security & Compliance:
SOC 2 Type II, HIPAA alignment, data sovereignty in US.
Seedance 2.5 Flash: Getting Started, Creative Controls, and Limits
Seedance 2.5 Flash is ByteDance’s faster, lower-cost version of its Seedance 2.5 video generation model. On Atlas Cloud, it generates videos from text, images, or multimedia references, with synchronized audio and support for video editing and extension.
Choose text-to-video when starting with a written prompt, or image-to-video to animate an opening image with an optional ending frame. For generation guided by reference images, videos, or audio, use reference-to-video, which also handles editing and extension.
Create an Atlas Cloud API key, then send an authenticated POST request to https://api.atlascloud.ai/api/v1/model/generateVideo with your selected model ID and inputs. For text generation, use bytedance/seedance-2.5-flash/text-to-video. Retrieve the result by polling https://api.atlascloud.ai/api/v1/model/prediction/{prediction_id} with the returned prediction ID.
Generate clips from 4 to 30 seconds at native 480p or 720p resolution. The text-to-video endpoint also lets the model choose the duration automatically. Output is available in MP4 or MOV format.
A reference-to-video request accepts up to 10 images, 5 video clips, and 5 audio clips. These inputs can guide the generated video, while the separate image-to-video mode uses an opening image and an optional ending frame.
Synchronized audio generation can produce voices, sound effects, and background music alongside the video. Set generate_audio to false when you need a silent output, or enable it to generate picture and sound together.
Yes, editing and extension are available through the reference-to-video model. Supply the source video and describe the changes or continuation you want, then review the result against your intended scene and continuity requirements.
Standard pricing starts at $0.167 per second of generated video on Atlas Cloud. Access is pay-as-you-go, so check the selected model’s standard rate and applicable settings when estimating production costs.
ByteDance positions Seedance 2.5 Flash as delivering near-flagship quality at about twice the generation speed and roughly 34% lower cost than Seedance 2.5. Flash outputs at 480p or 720p, making it a practical option for testing prompts and creative variants. Treat the speed comparison as a model-level claim rather than a guaranteed completion time for every request.
Flash does not support 1080p output or Draft mode, so do not send draft: true. Select 480p or 720p and validate your request against the chosen Flash endpoint’s schema before reusing an integration built for the flagship model.
Explore More Families
Seedance 2.5
The Seedance 2.5 API gives developers ByteDance Seed’s joint audio and video model, generating 4 to 30 seconds in one pass at up to native 4K from text, a first frame, or up to 50 references across images, video, and audio. It edits selected regions, extends clips, and follows white-model and green-screen inputs.
Seedance 2.5 Flash
The Seedance 2.5 Flash API gives developers the faster, lower-cost tier of ByteDance Seed’s Seedance 2.5, released on November 12, 2026. It generates video at nearly twice the speed of Seedance 2.5, renders up to 30 seconds per clip at 480p or 720p, and takes up to 10 images, 5 videos, and 5 audio clips per request, with video editing for quick variants.
Kling 4.0
The Kling 4 API delivers Kling 4.0, the video model Kuaishou released on October 15, 2026. It generates up to 30 seconds in a single pass, follows up to 10 keyframes, blends 15 images, videos, and subjects through Omni Reference, and adds stereo audio with lip sync. Atlas Cloud serves all four endpoints, including video editing, on one OpenAI-compatible key from $0.11 per second. Start building today.
Seedream 5.5
Seedream 5.5 is ByteDance Seed's image generation and editing family. Guide edits with up to 10 reference images, or split an image into a base image and up to 99 editable layers, with optional OCR for text layers. On Atlas Cloud, generation, editing, and layer decomposition each cost a standard $0.02 per image, helping developers plan image workflow budgets. Start building today.
Kling 4.0 Flash
As a lower-cost option in the Kling 4.0 family, Kling 4.0 Flash combines images, videos, and subjects to create consistent 720p clips lasting 3 to 20 seconds. Start from a text prompt or animate a first-frame image to suit different production workflows. Atlas Cloud offers all four model variants at a standard price of $0.094 per second. Start building today.
Wan 3.0
Wan 3.0 is Alibaba’s newest video model, producing up to 30 seconds of 1080p video at 30fps with audio in one generation. Steer it with a text prompt, a first frame, up to 10 reference images, or a document. Standard costs less per second, while Prime keeps the same capabilities and returns results faster. Both run on the same Atlas Cloud key as Wan 2.7, 2.6, and 2.5.
GPT Image 2.6
The GPT Image 2.6 API gives developers OpenAI’s image model released on November 4, 2026, in two versions: Flare for fast iteration and Sunburst for detailed visual work. It generates images 50% faster than before and adds animated GIF output, SVG export, markup edits that target the area you circle, and a complexity setting. Atlas Cloud serves both models on one OpenAI-compatible key with pay-as-you-go pricing.
MiniMax H3 Image
MiniMax H3-Image builds on MiniMax's H3 family, combining image generation and editing in one checkpoint. Detailed prompts guide characters, scenes, and composition, while reference inputs steer visual changes. Atlas Cloud offers hosted access with pay-as-you-go billing, helping you integrate image workflows without managing model infrastructure. Start building today.
MiniMax H3
MiniMax H3 is MiniMax's multimodal video family for text, image, and reference guided creation. Across supported routes, it preserves subjects from reference media, offers flexible aspect ratios, and pairs generated sound with visuals through H3 Developer, with output profiles selected by endpoint. Atlas Cloud unifies the family behind one OpenAI-compatible key with transparent pay-as-you-go pricing from the standard rate of $0.038 per second. Start building today.
GPT Image 2.5
GPT Image 2.5 is OpenAI’s image generation and editing model, released on September 8, 2026 in two API versions. Flare is the default, with up to 50% lower latency than GPT Image 2, while Sunburst takes longer to give finer control over detailed edits. Both support up to 16 reference images, five quality tiers, transparent backgrounds, and custom sizes up to 3840px. Atlas Cloud serves the GPT Image 2.5 API at OpenAI’s per token rates, or at a flat price per image by 1K, 2K, or 4K tier.
Seedream 5.0 Pro
Seedream 5.0 Pro API gives developers ByteDance's controllable image editing model on Atlas Cloud. It places edits precisely with anchors and coordinates, separates images into editable layers, fuses multiple references, and matches exact colors and materials, with multilingual text at 2K and 3K. On Atlas Cloud you reach it through one key!
Seedance 2.0
Seedance 2.0 is ByteDance’s production video model for precise shot creation. Turn prompts into video, animate a first-frame image with optional last-frame guidance, or shape results with reference media and optional web search. Atlas Cloud brings these workflows into one unified API with transparent pay-as-you-go pricing and one OpenAI-compatible key. Start building today.
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