Guides
Sume guides: the API, Formats, agents, models, media tools and pricing, each answer dated and sourced.
Python fallback chain for Sume video models: 404 and 503 only
After the Sora API shutdown, a model chain must not retry everything. This Python function moves on at 404 and 503 and stops on 429, 402, 400, 409.
Parse Retry-After as seconds or HTTP-date before retrying a Sume 429
A 21-line Python helper that reads retry-after as integer seconds or an HTTP-date, caps the wait, and falls back to exponential delay when the header is absent.
Python urllib: retry a Sume video submit on 429 and 503, no requests
A standard-library Python function that retries a Sume video submit on 429 and 503, reusing one Idempotency-Key and reading Retry-After. Tested on a stub.
A 2,000-word blog post read aloud: MAI-Voice vs Sume TTS cost
A 2,000-word post is about 12,000 characters: $0.264 on MAI-Voice-2.1, $0.18 on Flash, $0.57 on Sume TTS in one request. Arithmetic shown.
Seedance 2.5 leads 2.0 by 27 Elo on text-to-video, not image-to-video
Seedance 2.5 leads 2.0 by 27 Elo on AA text-to-video and 75 on editing, but 2.0 is fifth on image-to-video and 2.5 is not in the top 12. Sume prices both.
Seedance 2.5 or Wan 3.0 for text-to-video: 13 Elo, 2.8x the price
Wan 3.0 beats Seedance 2.5 by 13 Elo on text-to-video and 36 on editing, at $12.00 against $34.12 a minute. Pick by length, price and inputs.
Shopify image limit 20 MB / 25 MP vs GPT Image custom sizes on Sume
Shopify caps images at 20 MB and 25 MP. Sume's GPT Image custom size tops out at 8,294,400 px (3840 edge), so file size, not megapixels, is what you hit.
Shopify's 5 recommended video ratios vs what each Sume model makes
Shopify recommends 16:9, 9:16, 4:3, 3:4 and 1:1. Seedance, MiniMax H3 and Wan 3.0 cover all five; Kling 3 lacks 4:3 and 3:4, and Gemini Omni Flash only has 2.
Keep untrusted text out of the prompt: Sume run input is data only
Sume writes a run's input object to a file and treats it as data, not instructions. Schedule runs allow 64 properties and 2 MiB. Use it as a guardrail.
Test an avatar's look with a 4 second clip before a 60 second run
A 4 second Sume clip costs $0.736 on standard; a 60 second one $11.04. Use the cheap run to check face, voice and framing first. Numbers and checklist.
Test Sume retry code with a unittest fake server: 429 then 202
A stdlib fake server answers 429 with Retry-After, then 202. The test asserts your retry reuses the same Idempotency-Key and waits 7 seconds, with no sleep.
AA text-to-video top 12: six you can call on Sume, six you cannot
Of the 12 models on the AA text-to-video board, six have a Sume id that takes a prompt-only request. The list, with Elo and Sume's price per minute.
Black Friday supercut in Timeline: 12 segments vs auto chunking
Timeline accepts up to 200 video slots. A single strategy is refused above 12 segments (render_strategy_unsafe); auto chunks the render past 12.
Mixing 24 fps Seedance clips with 30 fps footage in Sume Timeline
Set output.fps to 24, 25, 30 or 60 in Timeline 1.0. If you omit it, the job matches the sources, and a mismatch returns output_fps_resamples_sources.
A Veo 3.1 call becomes a Sume Omni job in under 30 lines of Python
Replace a Veo 3.1 request with a Sume gemini-omni-flash-1.1 job: submit, poll every 30 seconds, download the mp4 and read usage.cost. Standard library only.
Veo 3.1 price as a multiple of Sume's Omni rate: 3.2x, 0.8x, 0.4x
At 720p Veo 3.1 Standard is 3.2x Sume's Omni rate, Fast is 0.8x and Lite 0.4x. The ratios at 1080p and 4K are in one table, with the Oct 22 caveat.
Video editing board: Wan 3.0 1,187, Seedance 2.5 1,151; Sume uses Omni
Wan 3.0 tops the AA video-editing board at 1,187 Elo. Sume's documented edit route is video_url on gemini-omni-flash-1.1, third at 1,139. Price inside.
Wallet reserve for a full queue of Seedance 2.5 clips, by plan
Sume reserves the estimate at submit. A full queue of 5 s Seedance 2.5 720p clips ($2.889 each) reserves $17.33 on Free and $346.68 on Scale.
Wan 2.2 CUDA out of memory: offload_model, dtype and t5_cpu flags
The Wan 2.2 README fixes OOM with three flags: offload_model, convert_model_dtype and t5_cpu. Which commands need 80 GB and 24 GB, and what it does not promise.
Audio edition of a weekly newsletter: 52 issues, TTS year cost
A 1,500-word issue is about 9,000 characters. A year of 52 audio editions costs $10.296 on MAI-Voice-2.1 and $22.36 on Sume TTS, per-job rounding included.
What a 13-point Elo gap means: Wan 3.0 vs Seedance 2.5 win chance
Wan 3.0 leads Seedance 2.5 by 13 Elo on the AA text-to-video board. On the standard Elo scale that is a 51.9% win chance per vote. Arithmetic for other gaps.
Which Sume errors mean switch the video model, and which mean wait
Eleven documented Sume error codes and job categories sorted into three actions: fix the request, retry the same model later, or fall back to another model id.
Within 30 Elo of Wan 3.0 for less: MiniMax H3 and H3 Max on Sume
MiniMax H3 (1,137) and H3 Max (1,130) sit 19 and 26 Elo behind Wan 3.0 on the AA board. Sume bills $4.50 and $6.00 a minute at 768p; Wan is $7.50 at 720p.
YouTube end screens need 25 seconds: lengthen a 20 second clip on Sume
YouTube's upload help says a video must be 25 seconds or longer to add an end screen. A 25 second Timeline render with a held still costs $0.10.
14-day holiday countdown from one still: Grok Imagine cost
Fourteen 6-second Grok Imagine Video 1.5 clips cost $1.05 on Sume; joining the 84 seconds adds $0.20. It needs a source image and has no audio.
Avatar face swap or talking video: recorded presenter vs scripted one
Sume has two ways to put an avatar on screen: face swap onto a 4 to 15 second source clip you recorded, or a script-driven talking video. How to choose.
Black Friday video ads: lock the model id 36 days after Veo ends
Black Friday is Nov 27, 2026, 36 days after Veo 3.1 previews end on Oct 22. A $12 plan: 20 Omni drafts at 360p, 4 finals at 1080p, with dates and arithmetic.
Can I show HunyuanVideo clips to EU viewers? Section 5(c) read
Tencent's HunyuanVideo license says do not use or display Outputs outside the Territory, which excludes the EU, UK and South Korea. Clause by clause.
Can you train a model on open video weights' outputs? Four licenses
H3 and HunyuanVideo bar using outputs to improve other models. LTX bars commercial distillation. Wan 2.2 is Apache 2.0. The clauses, quoted from vendor files.
Swap the LLM behind your MCP client: do Sume's gates change?
No. Hosted MCP gates sit in scopes, idempotency_key and max_spend_usd, not in the client model. What each session type can see, whatever model it runs.
Compliance training narration: 30 modules at 8,000 characters
30 training modules of 8,000 characters are 240,000 characters: $5.28 on MAI-Voice-2.1, $3.60 on Flash, $11.40 on Sume TTS as 30 jobs.
Crop a 10-minute 16:9 ad to 9:16: filter stops at 300 s, so split
Sume video filter takes sources of 300 seconds or less; TikTok non-Spark ads run to 10 minutes. Two trims, two crops and a timeline cost $1.08. The steps.
Do you have to credit an open video model? Label, notice, license
H3 requires a visible 'MiniMax H3' label in commercial products. Hunyuan only encourages 'Powered by'. LTX and Wan ask for notices and a license copy. Per file.
Does Sume offer Haiku 5.5, GLM 5.3 Flash or Mistral Large 4?
Checked against Sume's model catalog on 2026-10-08: Haiku 5.5 and GLM 5.3 Flash have enabled rows; Mistral Large 4, Clef and Strands Decider 2B have none.
Does Sume trim output match YouTube's H.264 and AAC recommendations?
YouTube recommends MP4, H.264 High Profile, closed GOP, AAC-LC. Sume trim docs state libx264, yuv420p and AAC. What matches, what is undocumented, how to check.
Free plan accepts 6 paid jobs: submit 7 and read queue_full
Free allows 1 processing job and 5 queued, so 6 are accepted. A Python script submits 7 in parallel and prints which are accepted and which get 429 queue_full.
Gemini Omni Flash 1.1 at 4K vs 1080p for an 8-second product ad
An 8-second Gemini Omni Flash 1.1 clip costs $1.00 at 720p, $1.50 at 1080p and $3.00 at 4K on Sume. Audio is always on and the ratio is 16:9 or 9:16.
GLM 5.3 Flash JSON output vs Sume's strict output_schema rules
GLM-5.3-Flash supports JSON output. Sume's run output_schema is stricter: object root, additionalProperties false, all properties required. A schema that works.
Griffin-Lite inputs vs a Sume talking-video request, side by side
Tavus describes a reference image plus streaming audio and controls; Sume takes an avatar handle, a script and a tier. The two request shapes compared.
What do 10,000 Haiku 5.5 agent turns cost? 8k vs 120k prompts
Worked token math from Anthropic's Haiku 5.5 price page: 10,000 turns of 8k tokens cost $10.50, while 10,000 turns of 120k tokens cost $625.
HunyuanVideo VRAM: 45 GB at 544p, 60 GB at 720p, 80 GB advised
The HunyuanVideo README lists 45 GB for 544x960 and 60 GB for 720x1280 at 129 frames, tested on one 80 GB GPU. FP8 saves about 10 GB. Table and hosted route.
HunyuanVideo 720p: 1,904 s on one GPU, 338 s on eight
README latency for a 1280x720, 129-frame, 50-step clip: 1,904 s on 1 GPU and 338 s on 8. The GPU-seconds each setup burns, and what it means for hosted jobs.
Imagen 4 with a reference image: Sume rejects it, use Nano Banana 2.1
Sume lists Imagen 4 Fast and Ultra as text-to-image only: input_references is 0 to 0. To edit a photo, use Nano Banana 2.1 at $0.10 per 1K image.
Is a 180 second video still a YouTube Short? Trim to 179.5 for margin
YouTube's Shorts page says up to 3 minutes. It says nothing on rounding, so cut to 179.5 s with Sume video trim (duration accepts decimals, $0.02 a job).
LTX-2.5 quick start downloads 66 GiB: the five files and a disk plan
The LTX-2 README quick start pulls about 66 GiB for five LTX-2.5 files, including a 12B Gemma text encoder. What to budget, and what Sume lists instead.
MP4 is on both lists: YouTube uploads and TikTok non-Spark ad formats
YouTube accepts 16 formats and TikTok non-Spark ads list five. MP4 and MOV are on both. Sume Timeline and trim return MP4, so one file serves both.
Museum audio guide: 40 stops at 600 characters, voice cost
A 40-stop audio guide at 600 characters a stop is 24,000 characters: $0.528 on MAI-Voice-2.1, $0.36 on Flash, $1.20 on Sume as 40 jobs.
Nightly Sume schedule: model choice and the 30-day cap math
A nightly Scheduled run caps generation at $1.00 by default, so 30 nights is at most $30. How the model's token cost sits beside that cap, with the arithmetic.