Two Billing Models, Two Different Estimates
I would not put Seedance 2.5 into a budget spreadsheet until I had picked the API route. The published BytePlus token prices and the gateway's per-second prices are different billing models, not interchangeable ways to quote the same request.
ByteDance Seed / BytePlus ModelArk lists the official model ID as dreamina-seedance-2-5-260628. Its published pricing is $10.70 per 1 million tokens without video input and $6.40 per 1 million tokens with video input. The published output tiers are 480p and 720p.
For five-second, 16:9 outputs, BytePlus gives these examples:
| Input category | 480p | 720p |
|---|---|---|
| Without video input | $0.514 | $1.156 |
| With video input | $0.553–$2.152 | $1.244–$4.838 |
The lower video-input token rate does not guarantee a cheaper request: input-video duration also contributes to estimated token consumption. BytePlus says it charges only for successfully generated videos. Published pricing and model information, however, do not by themselves confirm broad API access.
The per-second figures below come from the source's gateway pricing snapshots: August 27, 2026 for Seedance duration calculations and August 28, 2026 for the cross-model comparison. I would treat them as dated budgeting inputs, not a guarantee of current pricing or account access.
What I Would Verify Before Integrating
Seedance 2.5 is a multimodal video-generation model aimed at storytelling, reference-driven generation, and targeted editing. ByteDance describes support for up to 30 seconds of audio-video output in one pass, 30 image references, 10 video references, and 10 audio references, plus timestamp-level editing and multi-round extensions.
Those model capabilities should not be confused with the fields exposed by a particular API route. The documented gateway route uses seedance-2-5, supports text-to-video and image-to-video, and accepts durations from 4–30 seconds, defaulting to 5 seconds. Its listed output tiers are 480p and 720p; at 16:9, the exact sizes are 854x480 and 1280x720.
For unified multi-model access, CometAPI exposes Seedance 2.5, Vidu Q3, and Wan 3.0 through the same base URL and POST /v1/videos, allowing shared authentication, billing, queueing, polling, and monitoring. That is useful for comparisons and fallbacks, but I would still verify each route's sizes, duration limits, input fields, and callback support before shipping.
The asynchronous lifecycle matters as much as the submission endpoint: persist the returned id or task_id, poll GET /v1/videos/{id} until a documented terminal state, and download completed media promptly.
The Per-Second Budget
For the documented Seedance gateway rates, the calculation is straightforward:
generation_cost = requested_seconds * resolution_rate
effective_generation_cost_per_clip = total_generation_spend / accepted_clips
The first equation estimates an attempt. The second tells me whether the workflow is affordable. Neither automatically includes storage, delivery bandwidth, moderation review, editing, or reruns.
| Requested duration | 480p at $0.103/s | 720p at $0.231/s |
|---|---|---|
| 4 seconds | $0.41 | $0.92 |
| 5 seconds | $0.52 | $1.16 |
| 10 seconds | $1.03 | $2.31 |
| 15 seconds | $1.55 | $3.47 |
| 30 seconds | $3.09 | $6.93 |
At these rates, 720p costs about 2.24 times as much as 480p for the same duration. I would use 480p for early composition, motion, and reference tests, then increase resolution once those decisions are stable. The listed route does not publish 1080p or 4K pricing; neither belongs in a budget until the live model directory and API schema support it.
Volume Changes the Rounding
Using the underlying rates rather than rounded per-clip display prices, 100 five-second generations cost $51.50 at 480p or $115.50 at 720p. For 1,000, the baseline is $515 or $1,155. These estimates assume every task completes once and every output is accepted.
Regenerating 10% of the 100-clip 720p batch raises generation spend to $127.05. Acceptance changes the result further: if only 70 of 100 outputs pass review, $115.50 ÷ 70 is approximately $1.65 per accepted clip, before review or editing costs. That is the number I would put beside a competing model's measured result.
Compare Routes at the Same Resolution
The comparison below uses the source's August 28, 2026 gateway snapshot. All listed rates are per generated second; five-second totals are rounded. “Not listed” means that exact resolution tier was not published for the route.
| Resolution | Model ID | Rate per second | Five-second cost |
|---|---|---|---|
| 480p | wan3.0 |
$0.05 | $0.25 |
| 480p | seedance-2-5 |
$0.103 | $0.52 |
| 480p | viduq3 |
Not listed | Not applicable |
| 720p | wan3.0 |
$0.10 | $0.50 |
| 720p | viduq3 |
$0.1232 | $0.62 |
| 720p | seedance-2-5 |
$0.231 | $1.16 |
| 1080p | viduq3 |
$0.1232 | $0.62 |
| 1080p | wan3.0 |
$0.20 | $1.00 |
| 1080p | seedance-2-5 |
Not listed | Not applicable |
Wan 3.0 has the lowest listed native 480p and 720p rates in this comparison. Vidu Q3's lowest published tier is 540p at $0.056/s, or $0.28 for five seconds; I would not relabel that as a 480p offer. Its 720p tier includes synchronized audio, and its listed native 1080p rate is lower than Wan 3.0's.
Seedance is not the cheapest 720p option by unit price. Its longer duration and reference controls may justify the difference for particular shots, especially where they reduce stitching or reruns, but that needs testing against accepted output.
Where I Would Put Cost Controls
Recover existing tasks before retrying submissions. A polling timeout does not prove generation failed. The server may already have accepted the task, and resubmitting can create another billable job. Keep automatic retries bounded and retrieve the existing task whenever its ID is available.
Keep billing failures separate from quality failures. BytePlus's successful-generation billing statement is not a universal policy for every route. I would store task ID, model ID, requested seconds, size, terminal status, reported usage or charge, and rejection reason. An HTTP success is not evidence of a usable video; a terminal failure needs its own billing record.
Validate short drafts before committing to long output. My starting budget would use 480p at 4–5 seconds, promoting shots only after composition, motion, and reference handling pass review. A 30-second 720p attempt costs $6.93; repeating the whole clip because of an issue near the end gets expensive quickly. Higher resolution can also increase transfer, storage, review, and post-production costs without fixing an unstable prompt.
Benchmark the workflow, not just the rate card. For a fixed prompt set, I would record first-pass acceptance, rerun rate, generation time, and editing time. Cheaper routes can handle concept tests; Seedance can be reserved for validated shots that benefit from its capabilities. The decision metric is total API spend divided by accepted clips, with reviewer and editing costs added when material.
Originally published at cometapi.com
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