Every plan makes all three.
Image, video and audio on Free too. What changes between plans is how much and how fast — never what you are allowed to make.
The plans.
What actually differs.

What a plan buys.
No models are priced yet, so there is nothing to divide. The owner prices the catalog in the admin panel.
Or just top up.
See every modelWhat does a credit buy?
One generation, at the price the model itself carries. Every model publishes its credit cost in the catalog, and your balance is a single pool across image, video and audio.
What happens when a model is retired?
Credits stay spendable — they are never tied to a model. A retired row keeps its place in the catalog, marked as retired, and its successor becomes the picker's default.
How long is my work kept?
Per plan — the retention row in the table above is the answer for each one. Credits bought as a pack never expire; credits granted by a plan expire at the end of the period they were granted for.