For standard Seedance 2.5 text-to-video at 720p, BytePlus and Replicate have the lowest quotes in the five-service comparison checked for this guide. A five-second, 16:9 clip comes to roughly $1.16. SeedRouter is about $1.21, Kie $1.58, and fal $2.31.
There is another category to consider: economy offerings. reAPI lists Seedance 2.5 Eco at a displayed $0.201 per second for 720p without an uploaded video, or approximately $1.005 for five seconds using that rounded display price. It belongs on a cost-conscious shortlist, but it should retain its Eco label. The price table alone does not establish equivalent delivery characteristics.
This guide was prepared for SeedRouter. Quotes were checked on October 22, 2026. No claim of a universal cheapest service or measured quality advantage is intended.
Define “cheapest Seedance 2.5 API” for your application
A developer building a short-video tool needs a more precise question than “Which API is cheapest?” Specify the work being bought: five-second outputs, 720p, landscape, text input, generated audio, and the standard model offering. If economy tiers are acceptable, put them in a second comparison.
The distinction matters when procurement turns into implementation. A service may publish an attractive entry price for 480p, video-reference jobs, or a different tier. That number cannot price a 1080p text-only request. The smallest number on the model page is rarely a complete purchasing specification.
Keep a short quote record with the model label, billing unit, input mode, expected output, and observation date. It is easier to update five fields later than to reconstruct what a screenshot meant.
Start with the cost of the actual workload
Suppose an application needs 200 successful five-second 720p clips. Using the checked no-video-input estimates, the generation budget would be:
| Standard offering | Estimate for 200 clips |
|---|---|
| BytePlus | $231.12 |
| Replicate | $231.20 |
| SeedRouter | $242.83 |
| Kie | $315.00 |
| fal | $462.24 |
These are arithmetic projections, not invoices. They exclude discarded candidates beyond the 200 clips, reference videos, taxes, and any negotiated pricing. Rates come from the services’ own model and billing pages. BytePlus and fal use token estimates; Replicate and Kie publish per-second figures.
The difference between BytePlus and SeedRouter is about $11.71 for this workload. That is worth knowing, but it is also worth comparing with the work required to change an existing integration. The gap between SeedRouter and fal is much larger for these settings. Neither observation tells you which service your team should adopt without considering its current setup.
Calculate whether switching will pay for itself
Use this planning rule:
break-even clip count = one-time switching cost / saving per clip
Assume, purely for illustration, that adapting and checking an integration costs $300 in staff time and saves $0.10 per successful clip. The break-even point is 3,000 clips. At 200 clips a month, that takes 15 months; at 10,000, it takes less than one month. These are hypothetical inputs you should replace with your own.
Include the work that actually changes: request fields, task polling, error handling, asset retention, and usage reconciliation. A model available on both services does not guarantee an identical API contract. Overlooking those differences makes a migration appear cheaper than it is.
For a new product with no existing integration, the calculation is different. There is less switching work to recover, so the unit quote can carry more weight.
Keep creative waste out of the price comparison
The cheapest successful render is not necessarily the cheapest accepted result. An application that routinely asks for five variations and keeps one should budget five successful generations, even if the user interface shows a single final clip.
Separate technical failures from editorial rejection in your records. A failure policy addresses the former. It does not reimburse a valid output because the customer prefers another take. SeedRouter states that failed requests are not charged; completed alternatives remain part of the production bill.
A small acceptance test is more informative than a large speculative purchase. Choose a few representative prompts and score them against requirements written beforehand. Avoid changing the rubric after seeing which service supplied a clip.
When an economy tier is worth considering
reAPI exposes Seedance 2.5 Eco separately from its standard offering. That makes it possible to investigate a lower-cost tier without pretending it is the same commercial offer. Check the current resolution support, reference-input restrictions, and actual cost for your request before comparing it with the standard quotes above.
Do not infer slower processing, lower quality, or identical behavior from the word “Eco” alone. Those are questions for documentation and a controlled trial. A lower price is evidence of a lower quote, nothing more.
The useful purchasing decision is whether the tier meets your requirements at a lower total cost. If it does, there is little reason to pay for a more expensive offer solely because its label sounds more capable.
Before you buy credits
Check how much cash must be committed, whether the balance expires, and where final charges can be reconciled. A low nominal unit rate offers less practical value if it requires a commitment your application will not use. SeedRouter describes its balance as prepaid, with no subscription and no expiry; verify the equivalent terms separately for other services.
Also check the endpoint you intend to use. Regional variants and differently named tiers can carry different prices. The quote in this guide should never silently become the price of another offering during implementation.
Common purchasing questions
Which is cheapest for standard 720p text-to-video here?
BytePlus, by a very small amount over Replicate before rounding. The claim applies to the checked configuration and public quotes, not every Seedance request.
Should an economy tier be excluded?
No. Include it when it can meet the job, but label it separately and validate its contract. The reAPI Eco display price is below the standard quotes used here.
Is the lowest rate enough to choose a service?
Only if the other requirements are already satisfied. Otherwise, include integration effort, paid alternatives, and the cost of retaining the finished assets.
Buy against a budget you can reproduce
To find the cheapest Seedance 2.5 API for your application, put next month’s expected clips into the table and calculate the saving. If it is smaller than the work needed to switch, keep the existing integration for now. If it is substantial, test the exact offer before moving the workload.
