Request parameters each model lists on EmpirioLabs, with the allowed values or range where one applies. A dash marks a parameter the model does not list.
Next-generation Seedance built for long-form storytelling: one request can produce a coherent clip of up to 30 seconds, draw on up to 50 reference assets, and edit or extend existing footage.
Modes
Text to video, first frame, or first and last frame.
Multimodal reference to video from up to 30 images, 10 videos, and 10 audio clips. Audio-only input works on its own.
To edit an attached clip or continue it, describe that in your prompt. The model reads the intent from your wording.
Output
480p, 720p, and 1080p at 24fps, 4 to 30 seconds, with native synchronized audio.
MP4 by default. MOV carries higher color precision for grading and compositing, and some players cannot open it.
When you supply a first frame, the output follows that image's aspect ratio, so aspect_ratio stays adaptive. Reference jobs, including ones with a reference video, accept any ratio.
Draft mode
Set draft to true to render a 480p draft while you are still trying shots. Drafts render at 480p only.
The response returns the draft's id as usage.draft_task_id. Send that back as draft_task_id to render the same shot at 1080p.
The final render takes the prompt, reference assets, duration, aspect ratio, seed and audio setting from the draft, so anything you send alongside draft_task_id is ignored. A draft stays promotable for 7 days.
Input limits
Images: jpeg, png, webp, bmp, tiff, gif, heic, or heif, 300 to 6000 px per side, under 30 MB each.
Videos: MP4 or MOV, 2 to 30 seconds each and 30 seconds in total, under 200 MB each.
Audio: WAV or MP3, 2 to 30 seconds each and 30 seconds in total, under 15 MB each.
Reference uploads that contain real human faces are rejected by the model. To use your own face, email support@empiriolabs.ai.
Billing
Without a reference video, you are billed per second of generated video at the rate for the output resolution.
With a reference video, the model prices the reference clip's seconds alongside the generated seconds, at the lower video-input rate. Billed seconds are therefore reference duration plus output duration, so a request that includes a reference video costs more in total than the same output generated from text alone.
Draft mode is not a discounted rate. A draft bills as a normal 480p generation and its final bills as a normal 1080p generation, so the saving comes from trying shots at 480p and rendering only your pick at 1080p.
Worked example at 480p: a 4 second clip from a text prompt bills 4 seconds. A 4 second clip generated from a 5 second reference video bills 9 seconds at the video-input rate.
Uploaded media preprocessing
Video inputs are capped to 30 seconds.
Uploaded video inputs are normalized to provider-compatible MP4 when needed. Set preprocess_video to false to send a clip through untouched.
MiniMax H3
MiniMax H3 generates 4 to 15 second clips at 24 fps in 768p or 2K, each with a native stereo audio track.
Modes
Text to video: prompt only.
Image to video: one image becomes the opening frame.
First and last frame: supply an opening and a closing image.
Reference to video: up to 9 images, 3 videos and 3 audio clips, 12 reference files in total.
Regeneration: re-render a 768p clip you generated earlier at 2K. Send the original prompt plus the source clip as base_video.
Prompt expansion
Set enhance_prompt to true and the model first rewrites your brief into a full prompt, adding shot-by-shot structure, camera moves, lighting and a soundscape, then renders from that. Any reference media you attach informs the expansion. It adds a per-token charge on top of the per-second video cost, and is skipped for regeneration because that path reproduces the original request.
Reference media
Images 256 to 5760 px per side, aspect ratio between 0.4 and 2.5, up to 30 MB each.
Videos 2 to 15 seconds, H.264 or H.265, up to 50 MB each.
Audio 2 to 15 seconds, WAV or MP3, up to 15 MB each. Reference audio requires an accompanying image or video reference.
Reference video and audio apply to reference-to-video only.
Prompts can be up to 7000 characters and may describe dialogue, sound effects, on-screen text, and camera work.
Billing
Billed per second of the generated clip at the resolution you request.
A reference video is billed for its own duration in addition to the generated clip, so a 5 second reference used to make a 6 second clip bills 11 seconds.
Regeneration is billed at its own lower per-second rate, on the source clip duration plus the regenerated output. Reference images carried over from the original request are not charged again.
The first 5 reference images are included. Each additional reference image is charged separately.
Prompt expansion, when enabled, is billed per token.
How to call Seedance 2.5 and MiniMax H3
Seedance 2.5 runs through POST /v1/videos/generations. The request returns a job_id right away; poll GET /v1/jobs/{job_id} until the job completes and read the output URLs from the result. Both models are called through the same endpoint. Set model to seedance-2-5 or minimax-h3. Get an API key from the EmpirioLabs dashboard.
cURL: submit the job
curl https://api.empiriolabs.ai/v1/videos/generations \
-H "Authorization: Bearer $EMPIRIOLABS_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-2-5",
"prompt": "Describe what you want Seedance 2.5 to generate."
}'
Seedance 2.5 vs MiniMax H3: tests and guides
Prompt tests and comparison runs that cover both models.
What is the difference between Seedance 2.5 and MiniMax H3?
Seedance 2.5 is the newer release (Aug 7, 2026); MiniMax H3 was released on Jul 31, 2026. Capabilities listed only for Seedance 2.5: text to video, reference to video, video editing, audio sync, camera control, character consistency. Capabilities listed only for MiniMax H3: video generation, audio out, audio in. The specs, rate cards, and parameters on this page come from the live EmpirioLabs catalog.
Which is newer, Seedance 2.5 or MiniMax H3?
Seedance 2.5 is the newer release (Aug 7, 2026); MiniMax H3 was released on Jul 31, 2026.
Which has the lower rate, Seedance 2.5 or MiniMax H3?
The two models are priced on different units or tiers, so compare the live rate cards on this page. They always match what the API charges.
Can I switch between Seedance 2.5 and MiniMax H3 without rebuilding my integration?
Yes. Both models use POST /v1/videos/generations with the same EmpirioLabs API key, so most integrations switch by changing the model value. Check the parameters table on this page first if you rely on a model-specific parameter.
Can I try Seedance 2.5 and MiniMax H3 in the browser before integrating?
Yes. Open each model in the EmpirioLabs playground and run the same prompt on both, with the parameters the API exposes.
ByteDance 
MiniMax Video Generation
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