Models
The models behind Sume's video, image, speech, and music endpoints: ids, clip lengths, resolutions, aspect ratios, audio, references, and migration.
Kling 4.0 video editing: five video inputs, Sume edits one
Kling 4.0 editing takes up to five video inputs. Sume's Omni edit route takes one video_url and cannot combine it with references.
Kling 4.0 prompt length: 8,000 tokens vs Omni's 20,000 characters
Kling 4.0 allows prompts up to 8,000 tokens. Sume documents a 20,000-character prompt cap for gemini-omni-flash-1.1; tokens and characters differ.
Gemini Omni reference video length: 3 seconds per clip on Sume
On Sume, each Gemini Omni Flash reference video can be at most 3 seconds, with up to 3 clips. Trim longer footage first, then address clips as VIDEO_REF tags.
Seedance 2.5 reference limit: BytePlus says 50, Sume varies by model
BytePlus allows up to 50 multimodal references for one Seedance 2.5 clip. Sume documents limits per model, so read the catalog for the id you send. Examples.
Grok Imagine image edit limit: xAI 5 sources, Sume catalog
xAI's Aug 28 release notes raise image editing to 5 source images. On Sume, Grok is edit-capable with n of 1; read input_references per model.
Nano Banana Google Search grounding: not a Sume parameter
Google documents Search grounding for its Gemini image models. Sume lists Nano Banana 2 but no grounding field, and unlisted fields return 400.
Nano Banana thinking mode and thought images on Sume
Google's Gemini 3 image models use thinking mode and uncharged thought images. Sume lists no thinking field, and you pay only for completed images.
Nano Banana 14 reference images vs Sume's 10 input_references
Google says Gemini 3 image models mix up to 14 reference images. Sume's Nano Banana models take up to 10 input_references; ChatGPT Image 2.5 takes 16.
Odia and Urdu text to speech API: the language codes
Cartesia's Sonic 3.6 adds Odia (`or`) and Urdu (`ur`). On Sume, send the code in `language`, pin `sonic-3.6`, and check the voice before you pay.
Lyria RealTime API: streaming music vs a Sume file job
Lyria RealTime streams steerable instrumental music over a WebSocket. Sume's Music Router returns a finished audio file per job. Here is how they differ.
Lyria 3 Clip 30-second music API: ids Sume lists
Lyria 3 Clip always makes 30 seconds. Sume does not list it; ask for a 30-second track in the prompt with sume/music-auto, lyria-3.5 or lyria-3-pro.
Kazakh speech to text API: Nova-3 and Sume language_code
Deepgram added Kazakh to Nova-3 on Sep 3, 2026. Sume STT 1.0 takes an optional language_code hint, or auto-detect. How to send audio and check the output.
TikTok Symphony with Seedance 2.5: 30-second AI video ads
TikTok Symphony now generates up to 30 seconds with Seedance 2.5, in select markets. The same 30-second length is available by API on Sume as seedance-2.5.
Muse Image API: how to check what Sume's image catalog lists
Runway lists a muse_image model at 1 credit per image. For Sume, read the live image catalog instead of assuming; endpoint pricing lines are what you pay.
HeyGen reference to video: 9 images, 3 videos, 3 audio
HeyGen's heygen-video-1 reference mode takes 9 images, 3 videos and 3 audio files, 12 in total. Here is how Sume's reference limits compare.
HeyGen text to video API: 5-15 s, 768p vs Sume durations
heygen-video-1 makes 5-15 second clips at 480p or 768p from a 5,000-character prompt. Sume lists durations and resolutions per model in its catalog.
HeyGen ElevenLabs v3 model_id per request vs Sume TTS
HeyGen's speech endpoint takes settings.model_id such as eleven_v3 per request. Sume TTS 1.0 hides model ids; its separate TTS Router lists models explicitly.
Tavus Phoenix-4.5: photo rules vs a Sume photo avatar
Tavus Phoenix-4.5 starts a face from a photo in minutes and allows glasses, jewelry and hair. Sume creates an avatar from a public HTTPS image URL.
OmniHuman 1.5 API: native 1080p vs Sume avatar 720p
BytePlus says OmniHuman 1.5 outputs native 1080p from one image plus audio. Sume's Avatar Video currently outputs 720p; its video models list 1080p separately.
Mirage Avatar X: a 10-second AI twin vs Sume avatar inputs
Captions' Mirage Avatar X powers its avatars and AI twins, and a twin needs ten seconds of footage. Sume avatars come from a prompt, a profile or an image.
HeyGen photo avatar hand gestures vs Sume Motion Control
HeyGen's motion_prompt still needs an animation reference for Avatar V photo avatars. On Sume, body motion is a separate Motion Control route, not a prompt.
GPT Image 2 supported aspect ratios on Sume: 5:4, 9:8, 4:5
On Sume, gpt-image-2 accepts 5:4, 9:8 and 4:5 on top of the common ratios, plus custom pixels with a 3:1 limit. The exact list and the 9:8 size to send.
Generative Extend any aspect ratio: Sume video ratios
Premiere's Generative Extend now takes any aspect ratio. Sume's gemini-omni-flash-1.1 makes 16:9 or 9:16 clips; for other shapes, conform with Timeline fit.
Voice cloning API: clone once in the app, speak via the API
Sume has no API route that creates a voice clone. You clone once in the app, then send the voi_ id to the text to speech API on every call.
How to colorize a black and white video with AI
Colorize a black and white video with an AI video-to-video edit: send the clip and a prompt naming the colors. The model invents them.
AI outfit change video: change clothes in a clip with AI
Change someone's outfit in an existing video with an AI video-to-video edit: name the garment, what it becomes, and what must stay the same.
Batch edit photos with AI: one edit across many photos
To batch edit photos with AI, send the same edit prompt once per photo, with that photo as the reference. How to script it, pace it, and what it costs.
AI sky replacement: swap the sky and keep the photo
AI sky replacement: send the photo to an image-edit model, describe only the new sky, and list what stays. Then check roof and tree edges. Cost and limits.
Remove shadow from photo with AI: edit it or cut it out
To remove a shadow from a photo with AI, send the photo to an image-edit model, name the one shadow to remove, and list what stays. Prompts, cost, limits.
Kling 2.6 vs 3.0: length, resolution, audio and price
Kling 3.0 makes 3–15 s clips up to 4K with audio and multi-shot; 2.6 makes 5 or 10 s shots at 720p or 1080p. Kling's own specs and prices, dated.
AI avatar video aspect ratio: square, 3:4 and vertical 9:16
Sume's avatar video endpoint takes aspect_ratio 1:1, 3:4, 9:16, 4:3 or 16:9, defaulting to 9:16, at 720p. Which value to send for square or vertical.
AI image negative prompt: what to do when the API has no field
Sume's image API has no negative prompt field. Describe what you want instead, edit with a mask, and keep references. The fields that do exist.
AI image generator with readable text: which Sume models to try
Which Sume image models have a vendor claim about text in images, what each vendor says, and the quality setting Sume's docs suggest for dense text.
Does Lyria 3.5 music carry a SynthID watermark?
Google says all Lyria 3.5 audio includes a SynthID watermark. What that means for tracks made through an API, and what Sume's docs do and do not say.
AI video multiple faces consistency: Luma's 8-face limit, Sume's caps
Luma Ray3.2 lists facial performance tracking for up to 8 faces. Sume has no such setting; the limit is how many reference images each video model accepts.
Why AI video models do not lip sync to a voiceover, and what to use
Sume docs: video models do not lip-sync to generated speech or a voice-over. For a talking face use Avatar video or the lip-sync endpoint (still plus audio).
Cartesia Sonic 3.6 API: which model id to send
Send sonic-3.6 for the latest stable Sonic 3.6, a dated id to freeze it, or sonic-preview for beta. Which of these ids Sume's TTS Router lists.
ChatGPT Images 2.5 vs GPT-Image-2.5: which name is the API?
ChatGPT Images 2.5 is OpenAI's product; GPT-Image-2.5 Flare and Sunburst are the API models. How the names map to Sume ids and which features stay in ChatGPT.
Does ChatGPT Images 2.5 add a watermark? C2PA explained
OpenAI says ChatGPT Images 2.5 uses C2PA metadata and invisible watermarking to identify its images. What that means for files you get through an API.
Claude Sonnet 5.5 or Opus 5.5 for an agent that calls a video tool?
Sonnet 5.5 and Opus 5.5 differ in price and release date on Anthropic's pages. Which facts matter when the tool is Sume's video generation, and what stays same?
Text to speech Korean API: 90+ languages claim vs what Sume lists
Eleven v4 says 90+ languages. Sume's TTS schema publishes no language count, only a language field and five Sonic ids. Request Korean or Japanese and test it.
Eleven v4 audio tags [laughs]: how to use them, and Sume's controls
Eleven v4 reads inline tags such as [laughs] and [light rain] in the text. Sume's TTS schema has no tag syntax; it has speed, volume and emotion controls.
ElevenLabs Eleven v4 API: what it is and how to reach it
Eleven v4 and v4 Turbo launched September 28, 2026 on ElevenLabs' own API. What ElevenLabs says they do, and which TTS ids Sume's router lists.
FLUX.2 dev commercial use: what the model card says
FLUX.2 [dev] weights carry the FLUX non-commercial license, yet the card says outputs can be used commercially as that license describes. The exact wording.
FLUX.2 flex text rendering: prompt tips and the Sume model id
Black Forest Labs positions FLUX.2 [flex] for text and fine detail. How its typography guidance reads, and how to call black-forest-labs/flux.2-flex on Sume.
FLUX.2 hex color prompt: how to write it, with an API call
Black Forest Labs says FLUX.2 matches hex codes in prompts. The syntax it documents, the limits it admits, and a flux.2-pro call on Sume.
FLUX.2 pro vs Nano Banana Pro API: request specs side by side
Request parameters that differ between black-forest-labs/flux.2-pro and google/nano-banana-pro on Sume: resolution tiers, aspect ratios, references and price.
FLUX.2 prompt guide: structure, length and no negatives
Black Forest Labs' FLUX.2 prompt rules: subject, action, style, context; 30-80 words; no negative prompts. Which apply to flux.2-pro on Sume.