Group Price

VIP at 20% off, SVIP at 50% off specific models — this is where you set it.

What it is

GroupPrice lets a user group apply a discount multiplier on specific models. It composes with Model Price:

deducted = consumption × ModelPrice × GroupPrice(group, model)

GroupPrice defaults to 1.0 (no discount).

Where to find it

Admin → Group Prices.

What to set

Per row:

Field	Meaning	Effect
group_name	Group name	Matches the user's group field
model_name	Model name	Empty = default for the group; specific = that model only
discount	Multiplier	1.0=no change; 0.8=20% off; 1.2=20% markup

Match order

1. Exact (user_group, model) match
2. Otherwise (user_group, "") — the group's default multiplier
3. Otherwise 1.0

Common recipes

Flat VIP discount

group	model	discount
vip	(empty)	0.8

VIP + extra on a premium model

group	model	discount
vip	(empty)	0.8
vip	gpt-4o	0.5

Multiple groups

On first start the system seeds default / vip / svip at discount=1.0. Tune them in the UI as needed.

How to change

Admin → Group Prices → Add:

1. Pick group_name (e.g. vip)
2. Fill model_name (empty = group default)
3. Fill discount (e.g. 0.8)
4. Save

Don't

• Don't set every group to 1.0 (it's already the default)
• Don't create two rows with the same (group, model) (unique constraint)

vs. subscription discounts

Subscription plans have their own discount (subscription.discount). The two compose:

• Call hits a subscription → use subscription.discount
• Call misses → use GroupPrice

FAQ

• Set VIP 80% but user says it didn't apply: confirm the user is actually in the vip group (Personal Center or admin)
• Effective immediately?: Yes. Next call uses the new discount.
• Can one user stack discounts?: Yes — GroupPrice × subscription discount (if active).

Related

• Group Price Management (admin)
• Group Price Schema
• Model Price

Related API

• GET /api/group_price/ — list
• POST /api/group_price/ — add
• PUT /api/group_price/ — update
• DELETE /api/group_price/:id — delete