Head to head · Video generation · October 2026 research run
Gemini Omni 1.2 Flash vs Seedance on BytePlus ModelArk
Seedance on BytePlus ModelArk scores 60.7 (C) on agent readiness against Gemini Omni 1.2 Flash's 55.1 (C), and leads in 2 of 7 scored categories. Gemini Omni 1.2 Flash leads on reliability, schema & documentation, maintenance & community and transparency & trust. Both do video generation.
Best video generation for AI agents · All 203 video comparisons
Which one, for what
Best for Short product, ad and explainer clips with audio where an agent needs to revise a clip over several turns rather than regenerate it.
Ahead on
- Reliability, 45 against 40
- Schema & documentation, 69 against 61
- Maintenance & community, 83 against 65
- Transparency & trust, 72 against 65
Watch for
No free tier, per the pricing page
Seedance on BytePlus ModelArk C
Best for Agents that need long clips (up to 30 seconds), many reference assets, video editing and extension, or 4K, bought direct from the model's maker with callbacks and restricted keys.
Ahead on
- Agent ergonomics, 85 against 54
- Security & auth, 79 against 50
Also in its favour
- A hosted endpoint, with nothing to install
Watch for
No status page was found on byteplus.com, the docs or the trust centre, and no SLA was found that names ModelArk inference
Why the edge
Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.
Agent ergonomics Seedance on BytePlus ModelArk +31
Gemini Omni 1.2 Flash 54
Read on the lines the Veo listing used for video models. Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Per the Omni guide (written for 1.1 on the same API), the video comes back in the response, inline as base64 or as a Google-hosted file to poll until ACTIVE with delivery uri for outputs over 4 MB (12 of 15). No callback (0 of 10). Resolution, aspect ratio and delivery control output size, and edits run turn by turn through previous_interaction_id without regenerating from scratch (10). No list of past jobs found (0 of 10). Standard Google error statuses on the platform, with FAILED as the only Omni-specific state (12 of 14). No idempotency key, and whether failed generations are billed isn't stated (5 of 20). Only model and input are required, with 720p and 16:9 as defaults, and SDKs in five languages plus the CLI (15). 12 + 0 + 10 + 0 + 12 + 5 + 15 = 54.
Seedance on BytePlus ModelArk 85
Per the 9 October check, not re-read on 4 November (docs.byteplus.com answered robots.txt with its app page). Create returns only a task ID, the task object is small, and callback_url posts each status change so an agent need not poll (25). The list call pages with page_num and page_size up to 500 and filters by status, task ID, model and service tier, and resolution, ratio and duration size the output (20). Error codes come with a meaning and a suggested fix. On Seedance 2.5 some constraint errors arrive only after the task leaves the queue unless omni_reference_task_type is set (17). No idempotency key was found. Only successful videos are charged, a queued task can be cancelled with DELETE and a running one cannot (8). Only model and content are required, and official SDKs exist for Python, Go and Java (15).
Security & auth Seedance on BytePlus ModelArk +29
Gemini Omni 1.2 Flash 50
Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Keys bound to a service account and restricted to the Gemini API, with no scopes and a token accepted in the URL (15 of 30, the platform's deduction). The pricing page, read on 11 November, lists no free tier for Omni 1.2 Flash, and paid-tier content isn't used to improve Google's products (15 of 20). Retention of generated videos isn't stated in the guide (5 of 15). Request logs described for Generate Content, not confirmed for Interactions video calls (10 of 15). security.txt and a reward programme, no certification naming the API (5 of 20). Outputs carry a SynthID watermark, and uploads of minors and some recognisable people are refused in the EEA, Switzerland and the UK. 15 + 15 + 5 + 10 + 5 = 50.
Seedance on BytePlus ModelArk 79
Per the 9 October check for the docs pages, not re-read on 4 November. Model reading of the checklist (credential, training, retention, operator visibility, programme). API keys belong to a resource project, can be limited to named model IDs or endpoints and to an IP allowlist, and can be disabled or deleted. No expiry or rotation setting was found (28). The service terms say BytePlus will not use customer data to train models unless the customer opts in, and the data processing page and training FAQ agree (20). Task records last 7 days and video URLs 24 hours, DELETE removes a finished task record, and content that triggers the filter is kept 180 days. No general retention period for inputs was found (10). Keys show a last-used time and billing per key, and the console has usage statistics. The inference security audit page says it applies only to Skylark models (8). The trust centre lists ISO 27001, SOC 2 and other certifications for BytePlus as a whole, and the Go SDK repository's SECURITY.md points to the ByteDance security centre and a bounty policy. No security.txt, and no disclosure policy on byteplus.com itself. The Go SDK's SECURITY.md was re-read in a clone on 4 November, and OSV holds no advisory for the Go, Python or Java packages (13).
Maintenance & community Gemini Omni 1.2 Flash +18
Gemini Omni 1.2 Flash 83
Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Released and generally available on 5 November 2026; the SDKs added it to the Interactions model list on 10 November (30). Deprecations with earliest dates and no stated minimum notice (4 of 12). Churn in Google's video line: every Veo model on the Gemini API shut down by 22 October, and from 3 December 2026 requests to Omni 1.1 Flash are routed to 1.2 Flash and billed at its rates, four weeks after this release (4 of 8). Dated SDK and platform changelogs (15). SDK replies not sampled (5 of 10). Current SDKs in five languages (15). Runtimes stated (10). 30 + 4 + 4 + 15 + 5 + 15 + 10 = 83.
Seedance on BytePlus ModelArk 65
Model reading. The last dated change that touches Seedance is the 8 September 2026 deprecation notice for seedance-1-5-pro-251215, 57 days before this check; Dreamina Seedance 2.5 shows "Updated Aug 7, 2026" in the ai.byteplus.com model catalogue on 4 November, with no newer Seedance model. The Go SDK tagged v0.10.0 to v0.19.0 between 29 September and 3 November, but none of them changes its content-generation package, last changed on 26 August, so they don't set recency for this listing (as groq-speech-to-text's SDK releases that don't touch audio). The create-task reference's 8 October page date records no change. 20, in place of 30 (cause time and correction). The deprecation policy promises at least 30 calendar days' notice. seedance-1-5-pro-251215 got 64 days, from 8 September to 11 November 2026, after about 11 months on sale and with no automatic migration, and a Seedance 1.0 lite model went in the May 2026 batch. The minimum is short (12 of 20). Monthly product updates, model release and deprecation pages, with support by console ticket and a Discord server we did not test, per the 9 October check (11 of 15). Current official SDKs for Python, Go and Java (15). The Go SDK is Apache-2.0 with a CI workflow and 19 tags since its 11 August import, the latest v0.19.0 on 3 November 2026. It is below 1.0 and replaced an older SDK that the docs still need for some APIs (7). 20+12+11+15+7 = 65.
Schema & documentation Gemini Omni 1.2 Flash +8
Gemini Omni 1.2 Flash 69
Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Called through the Interactions API, which the platform's Discovery document doesn't type; the SDK's generated Interactions types list the model (10 of 25). llms.txt with Markdown twins (10). The Omni guide, read on 11 November, covers Omni 1.1 Flash on the same API and lists what isn't supported (system instructions, temperature, negative prompts, audio references, YouTube sources) and the regional limits; it doesn't name 1.2 (16 of 20). Aspect ratio (16:9 or 9:16), resolution (360p, 720p, 1080p, 4k) and delivery are enumerated; length is set in the prompt, not a field (10 of 15). REST and SDK examples; a failed generation sets the file state to FAILED, and other error codes aren't documented beyond the platform's page (8 of 15). Dated SDK and platform changelogs (15). 10 + 10 + 16 + 10 + 8 + 15 = 69.
Seedance on BytePlus ModelArk 61
Per the 9 October check, not re-read on 4 November (docs.byteplus.com answered robots.txt with its app page). No OpenAPI or similar file was found. The reference pages link an API Explorer that is drawn by script, which we could not read (0). www.byteplus.com/llms.txt is a short site index, and docs.byteplus.com has no llms.txt or published Markdown twin (3). The create-task reference states which models accept each field, which input modes cannot be mixed, and when to use frames over duration or set omni_reference_task_type (17). Fields carry types, ranges, defaults and per-model values. content is a mixed array of text, image, video, audio and draft items, and a legacy mode reads parameters from the prompt text (13). cURL, Python and Java examples in the tutorial, and an error page of about 120 rows with HTTP status, code, message and meaning (15). A versioned /api/v3 path, dated model IDs, and pages for product updates, model releases, deprecations and an API schema notice. Product updates are dated by month only and stop at August 2026 (13).
Transparency & trust Gemini Omni 1.2 Flash +7
Gemini Omni 1.2 Flash 72
Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Closed service with clear terms, SDKs Apache-2.0 (15). Paid only, so content isn't used to improve products; video retention isn't stated (20 of 30). Deprecations table and a dated routing notice for Omni 1.1 Flash (15 of 20). Data may be processed anywhere Google has facilities on the Gemini API route; no subprocessor list checked (5 of 20). SynthID watermarking is disclosed, and Google names the cases it still handles poorly. 15 + 20 + 15 + 5 = 55.
Seedance on BytePlus ModelArk 65
Per the 9 October check, not re-read on 4 November (docs.byteplus.com answered robots.txt with its app page). Closed models under the Customer Agreement (effective 30 September 2026) and the Service Specific Terms, which are public and dated. The Go SDK is Apache-2.0. Two cited documents, the General Terms for AI Services and the ModelArk Terms, returned no text to our reader (15). The service terms, the ModelArk data processing page and the training FAQ agree that customer data is not used for training without opt-in. Filter-triggered content is kept 180 days, and no general retention period for inputs is stated. A Data Processing Addendum is incorporated, which we did not open (20). A deprecation policy with a 30 day minimum and dated timetables for each batch (18). Processing locations are named as Malaysia, Indonesia and the EU/EEA, and a sub-processor list effective 24 September 2026 promises 15 days' notice of changes, but it has no ModelArk row (14).
Reliability Gemini Omni 1.2 Flash +5
Gemini Omni 1.2 Flash 45
Model reading for gemini-omni-1.2-flash on the Gemini API. Platform facts are the Gemini API listing's (gemini-api, re-read 1 November), carried over as RULES.md allows for a model on an already graded platform. Status page at aistudio.google.com/status with no readable components or history (10 of 20) and no readable incident record (5 of 30). Platform rate-limit tiers; the public rate-limit page has no Omni 1.2 row (5 of 15). Backoff guidance for 429 and 503 and SDK retries (15). No SLA read for the Gemini API route, and the Omni guide says provisioned throughput isn't supported there; Google's post puts it on Google Cloud (0). Google's post of 5 November says generally available, and the SDK commit marks the model GA (10). 10 + 5 + 5 + 15 + 0 + 10 = 45.
Seedance on BytePlus ModelArk 40
No status page was found on the site footer, the docs, the trust centre or llms.txt, per the 9 October check, and none is linked from www.byteplus.com/llms.txt or ai.byteplus.com/llms.txt on 4 November (0). With no history to read, the incident line takes the checklist's 5 for no readable record, as Seedream on ModelArk does, in place of the 0 given on 9 October (5). docs.byteplus.com answered its robots.txt request with its HTML app page on 4 November, so no docs page was requested and the docs readings are per the 9 October check, not re-read on 4 November. Rate limits are published per model, 600 task creations a minute and 10 concurrent tasks for enterprise accounts on Seedance 2.5 and 2.0, 180 and 3 for individuals, 15 and 1 at 4K, plus per-second limits on retrieve, list and delete. BytePlus calls them theoretical maximums that are not guaranteed (15). The error list has 18 entries under 429 and a burst traffic guide recommends exponential backoff. The Go SDK retries and reads a retry-after value, but the docs name no Retry-After header, no idempotency key and no safe way to retry a task creation; failed generations are not charged. This run gives backoff guidance without safe-retry guidance on writes 10, in place of 11 (10). An SLA exists for the BytePlus MLP Service at 99.5 per cent a month. It does not name ModelArk, so it is not counted (0). Seedance 2.5 is described as fully available with no preview label (10). 0+5+15+10+0+10 = 40.
Score by category
| Category | Weight this run | Gemini Omni 1.2 Flash | Seedance on BytePlus ModelArk | Edge |
|---|---|---|---|---|
| Reliability | 16%20 | 45 | 40 | Gemini Omni 1.2 Flash +5 |
| Performance | 10%pending | pending | pending | not scored in this run |
| Schema & documentation | 13%16.2 | 69 | 61 | Gemini Omni 1.2 Flash +8 |
| Agent ergonomics | 13%16.2 | 54 | 85 | Seedance on BytePlus ModelArk +31 |
| Security & auth | 14%17.5 | 50 | 79 | Seedance on BytePlus ModelArk +29 |
| Payments & pricing | 10%12.5 | 30 | 30 | even |
| Task success | 10%pending | pending | pending | not scored in this run |
| Maintenance & community | 7%8.8 | 83 | 65 | Gemini Omni 1.2 Flash +18 |
| Transparency & trust | 7%8.8 | 72 | 65 | Gemini Omni 1.2 Flash +7 |
| Negative events | ≤15 | 0 | 0 | |
| Total | C 55.1/100 | C 60.7/100 |
Facts side by side
| Fact | Gemini Omni 1.2 Flash | Seedance on BytePlus ModelArk |
|---|---|---|
| Kind | Model API | Model API |
| Vendor | BytePlus (ByteDance) | |
| Hosted endpoint | no (local only) | https://ark.ap-southeast.bytepluses.com/api/v3 |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | Closed model, used through the Gemini API and Google Cloud under Google's terms. The google-genai SDKs are Apache-2.0 | Proprietary service under the BytePlus Customer Agreement and Service Specific Terms. The Go SDK is Apache-2.0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-11-05 | 2026-11-03 |
| Terms last updated | 2026-04-28 | couldn't be read |
| Privacy policy last updated | 2026-10-01 | couldn't be read |
| Customer content may train models | yes | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
What the same task costs
| Task | Gemini Omni 1.2 Flash | Seedance on BytePlus ModelArk |
|---|---|---|
| Make a 30-second video clip30 seconds of generated video | $0.69 to $6.27 | $1.44 to $23.40 |
Estimated from each listing's published prices, the same tasks as on the price index. Plans, minimums and free allowances aren't counted.
How the scores have moved
Verdicts
Gemini Omni 1.2 Flash
Google's generally available video model makes clips of up to 15 seconds with audio, edits them turn by turn and upscales drafts to 1080p or 4K, from $0.023 a second at 360p to $0.209 at 4K. It is paid only, the guide still describes Omni 1.1, and every quality claim is Google's.
Seedance on BytePlus ModelArk
The video task API documents limits, error codes and per-model parameters in detail, with callbacks, a filterable task list and API keys restrictable by model and IP address. No status page, OpenAPI file or free video quota was found, the newest models need a USD 30 balance, and BytePlus model services are not sold in the United States.
Before you call either
Gemini Omni 1.2 Flash
- Call POST /v1beta/interactions with model gemini-omni-1.2-flash and response_format type video; Veo is gone from the Gemini API
- Set delivery to uri for clips over 4 MB and poll the file until ACTIVE; a later GET returns base64 only
- Edit with previous_interaction_id and leave store on, or the clip can't be edited in a later turn
- Set length in the prompt with timecodes such as [0-3s]; there is no duration field
- Draft at 360p or 720p and upscale only the keepers: 4K costs about nine times 360p
Seedance on BytePlus ModelArk
- POST to
/api/v3/contents/generations/taskson ark.ap-southeast.bytepluses.com, then poll GET/contents/generations/tasks/{id}or passcallback_url. Callbacks need an answer within 5 seconds - Download the result at once. Video URLs last 24 hours, task records 7 days, and a Seedance 2.5 URL allows 100 downloads
- Pass
resolution,ratioanddurationin the request body. Parameters appended to the prompt as--rsor--durare weakly validated and may be ignored - On Seedance 2.5 set
omni_reference_task_typetoeditorextendso constraint errors arrive at submission. Withautothey arrive after the task leaves the queue - Do not send reference images or video with real human faces to Seedance 2.5 or 2.0. Only a queued task can be cancelled with DELETE
Questions
Which is better for AI agents, Gemini Omni 1.2 Flash or Seedance on BytePlus ModelArk?
Seedance on BytePlus ModelArk scores 60.7 (C) on agent readiness against Gemini Omni 1.2 Flash's 55.1 (C), and leads in 2 of 7 scored categories. Gemini Omni 1.2 Flash leads on reliability, schema & documentation, maintenance & community and transparency & trust.
Do Gemini Omni 1.2 Flash and Seedance on BytePlus ModelArk need an API key?
Both need an API key.
Can an agent call Gemini Omni 1.2 Flash and Seedance on BytePlus ModelArk without installing anything?
No hosted endpoint is listed for Gemini Omni 1.2 Flash. Seedance on BytePlus ModelArk has a hosted endpoint at https://ark.ap-southeast.bytepluses.com/api/v3.
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Machine-readable
- This page as Markdown
/compare/gemini-omni-1-2-flash-vs-seedance-on-byteplus-modelark.md· slim.min.md· JSON.json(or sendAccept: text/markdown) - Each listing in full
/api/v1/tools/gemini-omni-1-2-flash.json·/api/v1/tools/seedance-on-byteplus-modelark.json - From a terminal
anchor compare gemini-omni-1-2-flash seedance-on-byteplus-modelark(the CLI) - Over MCP
compare_tools {"a": "gemini-omni-1-2-flash", "b": "seedance-on-byteplus-modelark"}at/mcp, no key