Blog
Sume blog: agent-native video generation, Avatar 1.0 orchestration, and production APIs for builders and coding agents.
Eight market beds in parallel: asyncio, one idempotency key each
Eight Music Router jobs with one Idempotency-Key per market and a metadata tag cost $1.00 and survive a retry without a second charge. A runnable Python script.
Gemini 3.8 Flash TTS vs Sume TTS: break-even 284 chars a minute
Gemini bills TTS by audio seconds, Sume by characters. Sume is cheaper only below 284.2 characters per audio minute on Flash (568.4 from 2027). Read 2026-10-08.
Can a Haiku 5.5 agent look at images? Sume's 30-image attachment rules
Anthropic says all current Claude models take image input. Sume accepts up to 30 images, 30 MB each, 500 MB total; Haiku 5.5 is a Format-run pick.
Kling motion control: a 2.4-second driver is billed as 3 seconds
Sume prices Kling 3.0 Motion Control per whole output second, rounded up. A 2.4-second driving video bills as 3 s, which is $0.4725 at $0.1575 per second.
MAI-Transcribe-2-Streaming lists no word timestamps; use batch
Microsoft's page shows word timestamps, diarization and keyword biasing for batch MAI-Transcribe-2 but not Streaming. Sume STT returns words. Read 2026-10-08.
Mistral Large 4 preview as your orchestrator, Sume as the renderer
Sume does not list Mistral Large 4. Let it plan in your own code and hand each video task to a Sume Agent Completion; Python sample with the required cap.
Most expensive single job per Sume video model: longest, top tier
The largest single job reserves $42.6465 on Seedance 2.5 (30 s, 1080p), $12.7575 on Seedance 2.0, $7.50 on Wan 3.0, $3.75 on Omni at 4K and $3.00 on H3 Max.
One 15-second ad in 3 ratios: render once, crop twice on Sume
A 15-second 1080p master on Wan 3.0 costs $3.75, and two $0.02 crops give 1:1 and 9:16 cutdowns for $3.79. Vidu Q4 at 540P is $0.675 per ratio.
One 640x640 render: TikTok 1:1 ad size and a square Short
A 640x640 square clears TikTok's 1:1 non-Spark minimum and fits YouTube's square-or-vertical Shorts rule. A 45-second render is $0.10 on Sume Timeline.
H3 Max Recast prompt: 2,000 characters, and the fields Sume rejects
The optional Recast prompt is capped at 2,000 characters, and aspect_ratio, generate_audio and frame fields are refused. A checker to run before a paid submit.
Retry cost of a mixed project: what a failed shot, 402 and replay bill
Six failure cases for an image, voice, music, video and render project, with the cost of the retry for each and the one mistake that pays for everything twice.
RMBG or upscale fails: image_not_fetchable and the HTTPS fix list
Sume cutout and upscale jobs need a public HTTPS image_url of at most 2,048 characters. Fix list for image_not_fetchable, 400 on model, 402 and 429 errors.
Same image as first and last frame: a 6-second loop on three models
A 6 s loop with one image as both first and last frame costs $2.27 on Seedance 2.0 at 720p, $0.60 on H3 Max at 768p and $0.75 on Omni at 720p.
Catalog says nano-banana-2, docs say 2.1: which id to send on Sume
On 2026-10-08 the Sume catalog Image Router entry still lists nano-banana-2, while the Image API docs say it runs as 2.1. Send google/nano-banana-2.1.
Sume STT: omit duration_seconds and you reserve one minute, not 570 s
The catalog says omitting duration_seconds reserves 1 minute; the maximum is 10 minutes ($0.10). A 570-second file lists at $0.095. Hold table, read 2026-10-08.
Sume TTS one-cent floor ends at 211 characters (vs MAI-Voice)
Sume TTS bills at least 1 cent a job; list price passes it at 211 characters. MAI-Voice-2.1 and Flash pass 1 cent at 455 and 667 characters. Read 2026-10-08.
Swap the backdrop on 90 product photos: mask edit or cutout plus plate
Three ways to change the background of 90 product photos on Sume: mask edit at medium $5.01, cutout with a plate per photo $4.25, or one shared plate $2.05.
Ten drafts and three finals a week: 30-second projects, wallet need
Weekly plan for 30-second mixed projects: ten drafts (480p, 0.5K stills) and three finals (1080p, 2K stills). Cost per tier, the week's total, the top-up.
TikTok 540x960 minimum: a 480p clip needs upscale factor 1.2, not 1.1
A 480-px-wide vertical clip fails TikTok's 540x960 floor. Sume video upscale starts at 1.1, which gives only 528 px. Use 1.2 or more; 25 clips cost $2.70.
TikTok's 540x960 minimum: Vidu Q4 540P or a Sume 720p clip?
TikTok's non-Spark ad minimum is 540x960 for 9:16. Sume's Omni at 360p falls below it; 720p clears it at $0.125/s. Vidu's release gives no pixel sizes.
Timeline's 0.5 s coverage rule on a 59-second spine: 58.5 is enough
Timeline accepts video slots that end at most 0.5 s before the end of the spine, so on a 59-second Short the slots must reach 58.5 seconds. Render is $0.10.
Inspect stills at max_edge 960: 540x960 views of a 9:16 ad
Video inspect max_edge 960 returns 9:16 stills at 540x960, TikTok's non-Spark minimum, so you review the ad at the smallest size it may run. 24 stills per call.
Video trim is async by default: mode sync waits 30 s, then poll
Video trim returns a job at once by default. Send mode sync to wait up to 30 s for a 200, else get 202 and poll status, then result. Never resubmit.
Vidu Q4 reference voice: audio references or TTS on Sume?
Vidu Q4 Preview adds reference voice. Sume does not list Vidu; some video rows take audio references, and TTS costs $0.0475 per 1,000 characters.
Voiceover spine: wav or mp3? 1,800 s is 158.76 MB or 28.8 MB
Timeline audio returns wav (sample-exact) or mp3 (smaller, padding at each edge). 1,800 s is 158.76 MB as 44.1 kHz mono wav vs 28.8 MB at 128 kbps.
Free checks before a TikTok ad: Timeline plan, filter check, not trim
Timeline plan and Video filter check are unbilled on Sume. Trim has no check. A 10-minute ad with one trim, one filter and one render totals $1.04.
Which Sume video models accept a music track as an audio reference?
Seedance 2.x, Wan 3.0, MiniMax H3 and H3 Max take audio references; Gemini Omni Flash 1.1 does not. Prices for 8 s plus a $0.125 bed.
A/B testing three image models on 50 prompts: what it costs on Sume
Fifty prompts on ChatGPT Image 2.5 medium, Seedream 5.0 Lite and Nano Banana 2.1 cost $0.825, $2.1875 and $5.00 on Sume. The full test and a script to run it.
Ad creative testing workflow with an API: five calls to a winner
A repeatable ad creative test on Sume: research hooks, generate variants, cut, caption and count the spend per variant. Five documented calls with prices.
Use your ad variant id as the Idempotency-Key on Sume
Name each ad variant once and send that name as the Idempotency-Key. Retries do not double-bill, and the receipt echoes it back so results map to your ad names.
Add a hand holding the product to a packshot with GPT Image 2.5
Turn a packshot into a hand-held photo: send the product photo and a hand or pose reference to openai/gpt-image-2.5. $0.0835 at high on Sume for one edit.
How do I add a voiceover and music to a timelapse video?
Narrate a 45-second timelapse with one TTS job, one music track and one Timeline render: 3 cents, $0.125 and $0.10, about 33 cents on Sume.
Add sunglasses or a hat to a person in an existing video (Omni edit)
Use Gemini Omni Flash 1.1 video_url edit on Sume to add an accessory to a person already in a clip. Prompt wording, a frame check list, and 4-second prices.
AI play-by-play voiceover for a sports highlight reel: how to time it
Write one line per play, ask TTS for sentence timings, and place each clip on its line: a 60-second reel costs about 14 cents on Sume. Not live commentary.
AI spokesperson release notes, 90 seconds: two jobs, cost by tier
A 90-second spokesperson video is two Sume avatar jobs because one job tops out at 60 seconds. Cost at standard, plus and max, and how to split the script.
How do I make a spoken wake-up alarm with an AI voice and music?
A wake-up alarm is a short voice greeting joined to a music file: 2 cents of TTS and a 1-cent concat per day, with one $0.125 music track reused all week.
Animate a painting with AI video: first frame and a slow camera prompt
Pin a painting as the first frame with frame_images on Sume, ask for a slow camera move, and pick the model by length and price. A 6-second price table.
Animate a pencil sketch or storyboard panel as the first frame
Use a sketch or storyboard panel as first_frame on Sume, and the next panel as last_frame on models that take an end frame. Prompt, models and windows.
Arabic speech to text API: Sume STT with language_code ar
Transcribe Arabic audio with Sume STT: send language_code ar, check the reported language, and review the text. $0.01 per audio minute.
Avatar handle with an @ prefix: Sume stores it without the @
You can send an avatar handle as @product_host or product_host. Sume normalizes it and stores it without the @. What that means for lookups and clips.
How do I turn an app screen recording into a Black Friday sale ad?
Trim a screen recording to 15 seconds, add a music bed and burn the offer in as captions. Four calls, $0.445 on Sume, no generative video needed.
How do I make a Black Friday video ad with no product photos?
Three 5-second Wan 3.0 text-to-video clips, a music bed, one render and burned-in deal text: $2.315 on Sume at 720p, no photo shoot needed.
Bulk queue concurrency 16 on Sume is a window, not a speed promise
Sume bulk Format runs accept concurrency 1 to 16. It limits how many children start at once and does not promise throughput. What 100 ad items really do.
callback_url or webhook_url: which field each Sume video route takes
POST /v1/videos takes callback_url; motion control, lip-sync and image routes take mode plus webhook_url. The field names and what they share.
Change the background behind a person in a video with AI (Omni edit)
Swap the backdrop behind a person in an existing clip with Gemini Omni Flash 1.1 edit on Sume: a keep-the-subject prompt, limits, and a 10-second price table.
Change the print on a t-shirt in a model photo with a design reference
Swap the graphic on a shirt in a model photo: photo first, new design as a second reference to ideogram/ideogram-v4.5. $0.075 per photo at medium on Sume.
ChatGPT Image 2 vs 2.5 at medium quality, 16:9: price on Sume
At 16:9 and medium quality, ChatGPT Image 2 bills $0.0525 per image on Sume and ChatGPT Image 2.5 bills $0.0105: five times less. Table, batch math and a swap.
Connect a new MCP client to Sume: five calls that prove it works
After you add https://mcp.sume.com/mcp to a new client, run mcp_health, tools_list, tools_schema, account_me and catalog_list. What each result should show.