Guides
Sume guides: the API, Formats, agents, models, media tools and pricing, each answer dated and sourced.
Runway Brand Kits in MCP, and how Sume handles references
Runway MCP agents can now reference Brand Kits, edited only in Runway's app. Sume's docs list no saved kit; you pass references per request.
Runway Enhance Frame Rate API: what Sume offers instead
Runway lists Enhance Frame Rate up to 120 fps. Sume documents no interpolation; it conforms with output.fps 24, 25, 30 or 60 by repeating or dropping frames.
Runway MCP for Grok Bot: what shipped and what Sume lists
Runway added an MCP plugin to Grok Bot on Sep 17, 2026 for paid plans. Sume's docs do not list Grok Bot; here is how to test whether any client can use its MCP.
Runway MCP in Cursor: what shipped and running a second server
Runway MCP reached Cursor's Marketplace on Sep 23, 2026. Cursor can hold more than one MCP server; here is how a second, Sume's hosted MCP, is added and scoped.
Seedance 2.0 API errors: what each 400 and 404 means
A Seedance 2.0 request on Sume fails with 400 unsupported_parameter, 400 unsupported_capability or 404 model_not_found. What triggers each and the fix.
Seedance 2.0 aspect ratio auto: can you send it on Sume?
fal's Seedance 2.0 pages list aspect_ratio auto. Sume's seedance-2 advertises six fixed ratios and refuses others, so send 16:9, 9:16 or another listed value.
Does generate_audio change Seedance 2.0's price?
No. fal says Seedance 2.0 audio costs the same on or off, and Sume's Seedance price has no audio input: seedance-2 reserves about $0.38 per 720p 16:9 second.
Seedance 2.0 max length: 15 seconds, and how to go longer
Seedance 2.0 clips run 4 to 15 seconds on Sume and on fal. For 16 to 30 seconds use seedance-2.5 ($17.34 at 720p) or chain clips with first_frame.
What is Seedance 2.0 Mini, and where can you run it?
Seedance 2.0 Mini is a Seedance 2.0 model that CapCut and fal list. On Sume it is the id seedance-2-mini, 4–15 s clips, about $0.19 per 720p second.
Seedance 2.0 reference limits: 9 images, 3 videos, 3 audio?
fal lists Seedance 2.0 reference-to-video at up to 9 images, 3 videos and 3 audio clips, 12 files in all. On Sume the API enforces the 12-file total. Details.
Does a reference video change Seedance 2.0's price?
Yes. A reference video adds 15 assumed input seconds at 0.6× on Sume, so a 10 s 720p clip on seedance-2 reserves $5.67, not $3.78.
Seedance 2.0 resolution in pixels: 480p, 720p and 1080p by ratio
Seedance 2.0 720p at 16:9 is 1280×720 and 1080p is 1920×1080. The full pixel table for six aspect ratios, as fal lists it and Sume prices it, with no 4K.
Seedance 2.5 3D blockout camera control: clay renders as a reference
Seed describes clay-render referencing, a textureless 3D model that blocks camera and pose. Sume has no clay mode; you send the render as a video reference.
Seedance 2.5 free: what is actually free on Sume, and the smallest job
Sume's docs describe no free Seedance 2.5 allowance: jobs reserve from a USD balance. What is unbilled, and what the smallest seedance-2.5 request costs.
Seedance 2.5 extend video beyond 30 seconds: what each round costs
Seedance 2.5 tops out at 30 seconds per request on Sume, so a longer video is several rounds. What 60 and 90 seconds cost at 480p, 720p and 1080p, and the join.
Seedance 2.5 1080p: request it and what it costs
Seedance 2.5 offers 480p, 720p and 1080p on Sume. Set resolution to 1080p, see the reserved cost at 5, 10 and 15 seconds, and the vendor's output notes.
Seedance 2.5 aspect ratios: 9:16 vertical, 21:9 and the rest
Seedance 2.5 on Sume accepts 21:9, 16:9, 4:3, 1:1, 3:4 and 9:16. Set aspect_ratio explicitly; 3:2 is rejected. Ratios, errors and the price effect.
Seedance 2.5 audio reference: how to send an audio clip
Seedance 2.5 accepts an audio clip as a reference, even without an image or video. The audio_url request on Sume, the vendor's file limits and what to expect.
Seedance 2.5 image to video: first frame and last frame
Send a first_frame, or a first_frame and last_frame, with seedance-2.5 on Sume. Rules for frame_images, how it differs from input_references and what to set.
BytePlus ModelArk Seedance 2.5: limits, tasks and how Sume maps
What BytePlus's ModelArk tutorial documents for Seedance 2.5 (task types, drafts, rate limits, retention) and which concepts exist in Sume's video API.
Seedance 2.5 omni reference: how @image, @video and @audio tags work
Seedance 2.5 prompts point at references with tags such as @Image 1. Sume rewrites lowercase tags like @image1 to the casing the model expects. Examples.
Seedance 2.5 price per second: 480p, 720p and 1080p
What a Seedance 2.5 clip costs on Sume at 480p, 720p and 1080p for 5, 10 and 30 seconds, from the pricing code. Cost scales close to linearly with seconds.
Seedance 2.5 50 references: how many can you use on Sume?
BytePlus lists 50 Seedance 2.5 references (30 images, 10 videos, 10 audio clips). Sume's API accepts 12 input_references per request for seedance-2.5. Compared.
When was Seedance 2.5 released, and where can you use it?
ByteDance Seed launched Seedance 2.5 on 2026-07-31 in its own apps. The model id seedance-2.5 is in Sume's video catalog. Dates and access, read 2026-09-29.
Seedance 2.5 video editing: green screen, camera angle, timestamps
ByteDance says Seedance 2.5 edits video by timestamp, incl. green screen and camera angle. What BytePlus documents for edits and what Sume's API lists today.
AI video generator using a reference video: Seedance 2.5 setup, cost
Send a reference clip to seedance-2.5 as a video_url input reference to borrow motion or camera work. The vendor limits and how it changes the estimate.
Seedance 2.5 vs 2.0: what changed in duration and references
Seedance 2.5 raises the clip to 30 seconds and references to 50 in BytePlus's docs. The 2.0 vs 2.5 table and how Sume's own limits differ, read 2026-09-29.
Seedance 2.5 vs Gemini Omni: length, references and editing
Seedance 2.5 and Gemini Omni Flash compared on published specs: 30 vs 10 seconds, reference rules, extension and edit mode. Ids on Sume and on Google's page.
Seedance 2.5 vs Kling 3.0: durations, references and audio
Seedance 2.5 and Kling 3.0 compared on the specs their own pages and Sume's catalog publish: length, resolution, references, audio. No winner, just the table.
Seedream 5.0 censorship: what a blocked image looks like on Sume
Sume's Seedream calls run with the provider safety checker on, with no switch for it. What a refused generation returns, whether it is billed, and what to do.
Seedream 5.0 Pro API: Sume lists 5.0 Lite, not Pro
Sume's catalog has bytedance-seed/seedream-5-lite, 4.5 and 4.0, and no Seedream 5.0 Pro id. What a Pro id returns and which listed model to call instead.
How to produce 30 episodes for a YouTube Shorts series
Thirty Shorts episodes are thirty identical jobs. Use one template, one Timeline call per episode with its own key, and a $3.00 render fee at 60 seconds.
YouTube vertical thumbnail size: 9:16 at 2160x3840
YouTube's thumbnail help lists 9:16 at 2160x3840 for vertical videos, 10 MB on mobile podcasts, and 16:9 at 3840x2160. Make one with GPT Image 2.5 on Sume.
Snapchat Ads MCP client ids: claude-snap-ads, codex-snap-ads, more
Each agent has its own Snapchat Ads MCP client id: claude-snap-ads, codex-snap-ads, chatgpt-snap-ads, gemini-snap-ads and antigravity-snap-ads. Where each goes.
Use two MCP servers in Claude: Snapchat Ads and video generation
Add the Snapchat Ads MCP and Sume MCP to one Claude Code session under different names: read ad data from one, generate video with the other. Commands inside.
Snap Ads MCP read-only: can an agent write to my account?
No: Snap says this release is read-only, so an agent can read Snapchat Ads data but cannot create, update or delete anything. What that means in practice.
Snapchat Ads MCP server: setup in Claude Code and Desktop
Add the Snapchat Ads MCP server to Claude with the claude-snap-ads client id, sign in, and know that this release is read-only. Commands from Snap's docs.
Snapchat Spotlight monetization: 30-second videos and follower rules
Snapchat's Monetization Program page says Spotlight videos must be 30 s or longer to earn revenue, with 50,000 followers and view-time limits. Sume builds 30 s+
Cartesia Sonic 3 languages: 44 in Sonic 3.6, how to set one
Cartesia says Sonic 3.6 speaks 44 languages, including new Odia and Urdu. How its language and locale fields work, and Sume's language field.
How to split an audio file into parts with an API
Split one audio file into parts at the times you choose with Sume's Timeline audio split: up to 20 ranges, each returned as its own wav or mp3 file.
Spotify error: audio and video streams are different durations
Spotify rejects a video episode whose audio and video tracks start and end at different times. Re-export them to match, then check the length with a probe.
Spotify video podcast specs: MP4, 1080p 16:9, H.264
Spotify for Creators recommends a 16:9 MP4 at 1080p or higher, H.264 and AAC-LC, 24 to 60 FPS, one video and one audio track. How to render and check it.
Stable Audio 3 open weights: run them yourself or call a hosted API
Stable Audio 3 Small SFX, Small and Medium are open-weight; Large is on Stability's API. Sume's music route lists Lyria ids only, so weights mean self-hosting.
Stable Audio 3 max length: six minutes, and how to reach it on Sume
Stability says Stable Audio 3 Medium and Large pass six minutes. Sume's Lyria music runs up to a few minutes; join separate takes for more with Timeline audio.
AI sound effects generator API: an open-weight SFX model, then Sume
Sume lists no sound-effects route. Stable Audio 3 Small SFX is open-weight, so you can run it yourself, import the files to Sume and mix them in Timeline 1.0.
Speech to text Korean API: send language_code or auto-detect?
Sume STT 1.0 takes an optional language_code such as ko; omit it and the language is auto-detected. When to pin Korean, when to omit it, and how TTS differs.
Which field do I branch on in a Sume API error: code or next_action?
Branch on the HTTP status, then on error.code. Use retryable, retry_after_seconds and next_action to decide on a resend. Never match on message.
API sends both Authorization Bearer and x-api-key: 401
Sume rejects a request that carries both Authorization: Bearer and x-api-key with 401 and 'Send only one API key credential.' Neither header wins. Fix it.