Wan 2.1 is the earliest generation this workspace still exposes. It is offered here as text to video at 720p, plus image to video. It is the lightest option on the list, which makes it useful for the part of the work that is cheapest to do at low resolution: iterating on a prompt before committing to a bigger render.
Both are separate tabs in the Wan workspace with their own credit cost. The model names and settings actually on offer appear live in the form, and availability can change without this page changing — the live controls are the source of truth.
Prompt iteration is the expensive part of this workflow, because you normally throw most attempts away. Drafting at a smaller output band and only re-running the keepers at full size is the straightforward way to keep that cost down.
Two habits make the comparison meaningful:
If you have no reason to prefer 2.1, start from Wan 2.5, which exposes the most routes here, or open the Wan workspace to see what is live.
Treat the first render as a test. A low-resolution draft is for judging composition and motion, not for delivery: artefacts that are invisible at 720p can be obvious once you render the same shot larger. Output quality varies by route and by prompt, so check the result rather than assuming it.
Cost depends on the model, resolution and duration, and is shown beside the form before you submit. Credit prices are on pricing.
Should I publish a 720p render? That depends on where it is going. If the destination needs more, draft here and re-run at the larger band.
Can I use the output commercially? Check the licence for the model route you used; terms differ between versions.
Where do I start? Open the Wan workspace and choose the Wan 2.1 tab.