Group Price

What it is

GroupPrice lets a user group apply a discount multiplier on a model (e.g. 0.8 = 20% off). It composes with Model Price:

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

Where to find it

• Admin → Group Prices: list, add, bulk edit
• The logged-in user's group and the matched GroupPrice are shown in Personal Center as "Current discount".

Operator-relevant fields

Field	Meaning	Effect
Group	default / vip / svip	Matches the user's group field.
Model	e.g. gpt-4o	Empty string = default multiplier for all models in this group.
Multiplier	1.0 = no change; 0.8 = 20% off; 1.2 = 20% markup	Multiplies the deduction.

Match order

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

Common recipes

• Flat VIP discount across all models

  Group	Model	Multiplier
  vip	(empty)	0.8

• VIP + extra discount on a premium model

  Group	Model	Multiplier
  vip	(empty)	0.8
  vip	gpt-4o	0.6

Don't

• Don't set every group to 1.0 (that is the default).
• Don't set two rows with the same (group, model) — unique constraint violation.

Related pages

• Group Price (business concept)
• Group Price Management (admin)

Related API

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