Seedance 2.5 API: 30-second clips, resolutions, references
Seedance 2.5 on Sume is seedance-2.5: 4–30 second clips at 480p, 720p, or 1080p. The documented limits, inputs, and billing for each Seedance id.
Models
The models behind Sume's video, image, speech, and music endpoints: ids, clip lengths, resolutions, aspect ratios, audio, references, and migration.
Start with: What AI models does Sume support? Every model id, by API surface
Sora 2 API shutdown: moving video generation calls
OpenAI shut down its Videos API and Sora 2 models on 2026-09-24. How the old fields map to Sume's POST /v1/videos, and why the model id must change.
Image-to-video API: set the first and last frame with frame_images
Send frame_images to POST /v1/videos with a first_frame and an optional last_frame. Which Sume models take each frame, what wins, and what gets refused.
Reference-to-video API: guide a clip with images, video, and audio
Send input_references to POST /v1/videos to guide a clip with reference images, videos, or audio. Which Sume video models take each type, and how many.
AI video editing API: edit a video with a prompt (video-to-video)
Edit an existing clip with a prompt: send video_url to POST /v1/video-router/generate with gemini-omni-flash-1.1. What edit mode takes, rejects, and costs.
GPT Image 2.5 API on Sume: quality, sizes, masks, and references
Call ChatGPT Image 2.5 through Sume's POST /v1/images: pick a quality tier up to max, set custom pixel sizes, add a mask, and send up to 16 reference images.
Text-to-video API with audio: which video models generate sound
On Sume, POST /v1/videos makes sound on models whose catalog sets generate_audio. Which models make audio always, optionally, or never, and what is refused.
AI video generation API length limits: up to 30 seconds per clip
On Sume, seedance-2.5 (4–30 s) and wan-3.0 (2–30 s) make 30-second clips; other models stop at 15 s or less. Limits by model, the error, and going longer.
Vertical 9:16 video generation API: aspect ratios by model
For vertical video, send aspect_ratio "9:16" to POST /v1/videos. Which Sume models support 9:16, 1:1, and 21:9, and why a pixel size returns 400.
4K AI video generation API: resolutions by model, 360p to 4K
For 4K on Sume, pin gemini-omni-flash-1.1 with resolution 4K; minimax-h3 upscales to 2K or 4K. Resolutions for every video model, and the price effect.
Gemini Omni Flash 1.1 API: text, image, and reference video modes
Call Gemini Omni Flash 1.1 on Sume as gemini-omni-flash-1.1: text, image, or reference to video, 3–10 second clips from 360p to 4K, with native audio.
MiniMax H3 API: H3 and H3 Max video at native 768p with stereo audio
Call MiniMax H3 and H3 Max on Sume as minimax-h3 and minimax-h3-max: 5–15 second clips at native 480p or 768p, 1080p on H3 Max, always with stereo audio.
Nano Banana Pro API on Sume: 4K tiers, aspect ratios, and edits
Call Nano Banana Pro or Nano Banana 2 through Sume's POST /v1/images: pick a 512 to 4K resolution tier, a native aspect ratio, and up to 10 reference images.
Lip sync API: turn an image and audio into a talking clip
Send a still image and Sume-hosted audio to VEED Fabric 1.0 or MiniMax H3 Max Lip Sync and get a talking clip back. Inputs, limits, and per-second pricing.
Image generation API models on Sume: edits, references, and masks
Sume's image generation API lists 17 models. See which edit from reference images, how many references each takes, which are text-only, and which take masks.
AI image generation API aspect ratios: 4:5, custom sizes, and auto
Send aspect_ratio or image_size to Sume's POST /v1/images: which image models accept 4:5, which take custom pixel sizes, and when to send auto on edits.
Wan 3.0 API: 2–30 second AI video with audio, frames, and references
Call Wan 3.0 on Sume as wan-3.0: 2–30 second clips at 480p, 720p, or 1080p from a prompt, first and last frames, or image, video, and audio references.
Seedream 4.5 API on Sume: image edits, custom sizes, and 5 Lite
Call Seedream 4.5, Seedream 5.0 Lite, or Seedream 4.0 through Sume's POST /v1/images: edit from up to 10 reference images and set custom pixel sizes.
4K AI image generation API: resolution, quality, and image count
Only Nano Banana 2 and Pro list a 4K tier on Sume's POST /v1/images. See each model's resolution tiers, quality levels, per-call image count, and formats.
What AI models does Sume support? Every model id, by API surface
Sume supports 10 video models, 17 image models, Music and TTS Router ids, Avatar 1.0, and lip-sync models. Every id, grouped by endpoint.
Motion control API: animate an image with a driving video
Kling 3.0 Motion Control on Sume animates a still image with the motion of a driving video up to 30 seconds long. Request fields, limits, and price.
Text to speech API: generate speech in an avatar's voice
Sume's text to speech API, POST /v1/tts-1.0/generate, speaks up to 20,000 characters in a ready avatar's voice, with word timestamps and sentence audio slices.
Consistent character across multiple AI video shots: 3 API inputs
Three documented Sume API inputs send the same character source into every shot: a reusable Avatar 1.0 avatar, one first-frame still, or image references.
Music generation API: the Sume Music Router with Lyria 3.5
Sume's Music Router turns a text prompt into a track via POST /v1/music-router/generate. sume/music-auto picks the engine, Lyria 3.5 today.
Image generation API with reference images: POST /v1/images
Send a prompt plus public HTTPS reference images to Sume's POST /v1/images. Pin a catalog model or send sume/auto; the catalog lists each model's limits.
TikTok trending video search API: ranked metadata for research
Sume's POST /v1/trending-videos/search returns ranked public TikTok video metadata for a brand, product, creator, or keyword. It does not download videos.
Video 1.0 and Image 1.0 are retiring soon: move to sume/auto
Sume Video 1.0 and Image 1.0 are retiring soon and already run as aliases for the Auto path. New integrations call /v1/videos or /v1/images with sume/auto.
An OpenRouter-compatible video API: sume/auto or a pinned model
Sume's POST /v1/videos follows OpenRouter's video generation API field for field. Let sume/auto pick the model, or pin a catalog id like seedance-2.5.