feat：管理后台支持模型价格配置入口

backend/check_billing_logs.py

@@ -0,0 +1,45 @@
+#!/usr/bin/env python3
+"""检查最近的计费记录，诊断重复扣费问题"""
+
+import sys
+import os
+
+# 添加项目路径
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), "open_webui"))
+
+from internal.db import get_db
+from models.billing import BillingLog
+from sqlalchemy import desc
+
+def check_recent_logs(limit=10):
+    """查询最近的计费记录"""
+    with get_db() as db:
+        logs = (
+            db.query(BillingLog)
+            .order_by(desc(BillingLog.created_at))
+            .limit(limit)
+            .all()
+        )
+
+        print(f"最近 {len(logs)} 条计费记录：\n")
+        print("=" * 150)
+
+        for i, log in enumerate(logs, 1):
+            # 转换时间戳（纳秒 → 秒）
+            import datetime
+            created_time = datetime.datetime.fromtimestamp(log.created_at / 1000000000)
+
+            print(f"{i}. ID: {log.id[:8]}...")
+            print(f"   用户: {log.user_id}")
+            print(f"   模型: {log.model_id}")
+            print(f"   类型: {log.log_type}")
+            print(f"   状态: {log.status}")
+            print(f"   Tokens: {log.prompt_tokens}+{log.completion_tokens}")
+            print(f"   费用: {log.total_cost / 10000:.4f} 元")
+            print(f"   余额: {log.balance_after / 10000:.4f} 元" if log.balance_after else "   余额: None")
+            print(f"   预扣费ID: {log.precharge_id[:8] if log.precharge_id else 'None'}...")
+            print(f"   时间: {created_time}")
+            print("-" * 150)
+
+if __name__ == "__main__":
+    check_recent_logs(15)

backend/open_webui/utils/billing.py

@@ -120,11 +120,23 @@ def calculate_cost(
 
     # 2. 计算费用（毫）
     # 公式: (tokens * price_per_million) / 1000000
-    input_cost = (prompt_tokens * input_price) // 1000000
-    output_cost = (completion_tokens * output_price) // 1000000
-    total_cost = input_cost + output_cost
+    # 使用整数计算，先相加再向上取整，避免浮点数精度问题和重复向上取整
 
-    return int(total_cost)
+    # 计算原始费用（未除以 1000000）
+    input_cost_raw = prompt_tokens * input_price
+    output_cost_raw = completion_tokens * output_price
+    total_cost_raw = input_cost_raw + output_cost_raw
+
+    # 如果有 token 消耗
+    if total_cost_raw > 0:
+        # 向上取整: ceil(a/b) = (a + b - 1) // b
+        total_cost = (total_cost_raw + 999999) // 1000000
+        # 如果计算结果 < 1 毫，至少扣 1 毫
+        total_cost = max(1, total_cost)
+    else:
+        total_cost = 0
+
+    return total_cost
 
 
 def deduct_balance(

src/lib/components/admin/Settings/Models.svelte

@@ -15,6 +15,7 @@
 		updateModelById,
 		importModels
 	} from '$lib/apis/models';
+	import { listModelPricing } from '$lib/apis/billing';
 	import { copyToClipboard } from '$lib/utils';
 	import { page } from '$app/stores';
 
@@ -34,6 +35,7 @@
 	import Download from '$lib/components/icons/Download.svelte';
 	import ManageModelsModal from './Models/ManageModelsModal.svelte';
 	import ModelMenu from '$lib/components/admin/Settings/Models/ModelMenu.svelte';
+	import ModelPricingModal from '$lib/components/admin/Settings/Models/ModelPricingModal.svelte';
 	import EllipsisHorizontal from '$lib/components/icons/EllipsisHorizontal.svelte';
 	import EyeSlash from '$lib/components/icons/EyeSlash.svelte';
 	import Eye from '$lib/components/icons/Eye.svelte';
@@ -56,6 +58,11 @@
 	let showConfigModal = false;
 	let showManageModal = false;
 
+	// 定价相关
+	let modelPricings = {};
+	let showPricingModal = false;
+	let selectedModelForPricing = null;
+
 	$: if (models) {
 		filteredModels = models
 			.filter((m) => searchValue === '' || m.name.toLowerCase().includes(searchValue.toLowerCase()))
@@ -84,13 +91,27 @@
 		workspaceModels = await getBaseModels(localStorage.token);
 		baseModels = await getModels(localStorage.token, null, true);
 
+		// 加载所有模型定价
+		try {
+			const pricingList = await listModelPricing();
+			modelPricings = pricingList.reduce((acc, p) => {
+				acc[p.model_id] = p;
+				return acc;
+			}, {});
+		} catch (error) {
+			console.error('加载定价失败:', error);
+			modelPricings = {};
+		}
+
 		models = baseModels.map((m) => {
 			const workspaceModel = workspaceModels.find((wm) => wm.id === m.id);
+			const pricing = modelPricings[m.id]; // 获取定价
 
 			if (workspaceModel) {
 				return {
 					...m,
-					...workspaceModel
+					...workspaceModel,
+					pricing // 附加定价信息
 				};
 			} else {
 				return {
@@ -98,7 +119,8 @@
 					id: m.id,
 					name: m.name,
 
-					is_active: true
+					is_active: true,
+					pricing // 附加定价信息
 				};
 			}
 		});
@@ -245,6 +267,14 @@
 
 <ConfigureModelsModal bind:show={showConfigModal} initHandler={init} />
 <ManageModelsModal bind:show={showManageModal} />
+<ModelPricingModal
+	bind:show={showPricingModal}
+	model={selectedModelForPricing}
+	pricing={selectedModelForPricing?.pricing || modelPricings[selectedModelForPricing?.id]}
+	on:save={async () => {
+		await init(); // 重新加载数据
+	}}
+/>
 
 {#if models !== null}
 	{#if selectedModelId === null}
@@ -365,6 +395,63 @@
 												: model.id}
 									</span>
 								</div>
+
+								<!-- 定价信息 -->
+								{#if model.pricing || modelPricings[model.id]}
+									{@const pricing = model.pricing || modelPricings[model.id]}
+									<div class="flex items-center gap-2 text-xs mt-1.5">
+										<!-- 定价显示 -->
+										<span class="text-gray-600 dark:text-gray-400">
+											<span class="text-gray-400 dark:text-gray-500">入</span>
+											<span class="font-mono">¥{(pricing.input_price / 10000).toFixed(2)}</span>
+											<span class="mx-1.5 text-gray-300 dark:text-gray-600">|</span>
+											<span class="text-gray-400 dark:text-gray-500">出</span>
+											<span class="font-mono">¥{(pricing.output_price / 10000).toFixed(2)}</span>
+											<span class="text-gray-400 dark:text-gray-500 ml-0.5">/M</span>
+										</span>
+
+										<!-- 编辑按钮（仅管理员） -->
+										{#if $user?.role === 'admin'}
+											<button
+												class="text-blue-600 dark:text-blue-400 hover:underline"
+												on:click|stopPropagation={() => {
+													selectedModelForPricing = model;
+													showPricingModal = true;
+												}}
+											>
+												{$i18n.t('编辑')}
+											</button>
+										{/if}
+									</div>
+								{:else}
+									<!-- 默认定价 -->
+									<div class="flex items-center gap-2 text-xs mt-1.5">
+										<span class="text-gray-400 dark:text-gray-500">
+											<span>入</span>
+											<span class="font-mono">¥1.00</span>
+											<span class="mx-1.5 text-gray-300 dark:text-gray-600">|</span>
+											<span>出</span>
+											<span class="font-mono">¥2.00</span>
+											<span class="ml-0.5">/M</span>
+										</span>
+										<span class="text-orange-500 dark:text-orange-400 text-[10px] px-1 py-0.5 bg-orange-100 dark:bg-orange-900/30 rounded">
+											{$i18n.t('默认')}
+										</span>
+
+										<!-- 编辑按钮（仅管理员） -->
+										{#if $user?.role === 'admin'}
+											<button
+												class="text-blue-600 dark:text-blue-400 hover:underline"
+												on:click|stopPropagation={() => {
+													selectedModelForPricing = model;
+													showPricingModal = true;
+												}}
+											>
+												{$i18n.t('设置')}
+											</button>
+										{/if}
+									</div>
+								{/if}
 							</div>
 						</button>
 						<div class="flex flex-row gap-0.5 items-center self-center">

src/lib/components/admin/Settings/Models/ModelPricingModal.svelte

@@ -0,0 +1,157 @@
+<script lang="ts">
+	import { toast } from 'svelte-sonner';
+	import { createEventDispatcher, getContext } from 'svelte';
+	import { setModelPricing } from '$lib/apis/billing';
+	import Modal from '$lib/components/common/Modal.svelte';
+	import XMark from '$lib/components/icons/XMark.svelte';
+
+	const i18n = getContext('i18n');
+	const dispatch = createEventDispatcher();
+
+	export let show = false;
+	export let model: any;
+	export let pricing: any;
+
+	let inputPrice = 0; // 元/M
+	let outputPrice = 0; // 元/M
+	let loading = false;
+	let initialized = false;
+
+	// 只在弹窗首次打开时初始化，之后不再重置
+	$: if (show && !initialized) {
+		if (pricing) {
+			// 初始化：毫 → 元
+			inputPrice = pricing.input_price / 10000;
+			outputPrice = pricing.output_price / 10000;
+		} else {
+			// 无定价时，使用 0
+			inputPrice = 0;
+			outputPrice = 0;
+		}
+		initialized = true;
+	} else if (!show) {
+		// 弹窗关闭时重置标志
+		initialized = false;
+	}
+
+	const submitHandler = async () => {
+		if (inputPrice < 0 || outputPrice < 0) {
+			toast.error($i18n.t('价格不能为负数'));
+			return;
+		}
+
+		loading = true;
+		try {
+			// 提交：元 → 毫
+			await setModelPricing(localStorage.token, {
+				model_id: model.id,
+				input_price: Math.round(inputPrice * 10000),
+				output_price: Math.round(outputPrice * 10000)
+			});
+
+			toast.success($i18n.t('定价更新成功'));
+			dispatch('save');
+			show = false;
+		} catch (error: any) {
+			toast.error(`${$i18n.t('更新失败')}: ${error.detail || error}`);
+		} finally {
+			loading = false;
+		}
+	};
+</script>
+
+<Modal size="sm" bind:show>
+	<div>
+		<div class="flex justify-between dark:text-gray-300 px-5 pt-4 pb-2">
+			<div class="text-lg font-medium self-center">
+				{$i18n.t('编辑模型定价')} - {model?.name}
+			</div>
+			<button class="self-center" on:click={() => (show = false)}>
+				<XMark className={'size-5'} />
+			</button>
+		</div>
+
+		<form class="flex flex-col w-full px-5 pb-5" on:submit|preventDefault={submitHandler}>
+			<!-- 模型ID -->
+			<div class="mb-4 p-3 bg-gray-50 dark:bg-gray-800 rounded-lg">
+				<div class="text-sm text-gray-600 dark:text-gray-400">
+					{$i18n.t('模型ID')}: <code class="font-mono">{model?.id}</code>
+				</div>
+			</div>
+
+			<!-- 输入价格 -->
+			<div class="mb-4">
+				<label class="block text-sm font-medium mb-2 dark:text-gray-300">
+					{$i18n.t('输入价格')} ({$i18n.t('元')}/{$i18n.t('百万tokens')})
+				</label>
+				<input
+					type="number"
+					step="0.01"
+					min="0"
+					bind:value={inputPrice}
+					class="w-full px-3 py-2 border dark:border-gray-600 rounded-lg dark:bg-gray-800 dark:text-gray-100"
+					placeholder="{$i18n.t('例如')}: 2.5"
+					required
+				/>
+				<div class="text-xs text-gray-500 dark:text-gray-400 mt-1">
+					{$i18n.t('当前')}: ¥{(inputPrice || 0).toFixed(2)}/M = {((inputPrice || 0) * 10000).toFixed(
+						0
+					)} {$i18n.t('毫')}/M
+				</div>
+			</div>
+
+			<!-- 输出价格 -->
+			<div class="mb-4">
+				<label class="block text-sm font-medium mb-2 dark:text-gray-300">
+					{$i18n.t('输出价格')} ({$i18n.t('元')}/{$i18n.t('百万tokens')})
+				</label>
+				<input
+					type="number"
+					step="0.01"
+					min="0"
+					bind:value={outputPrice}
+					class="w-full px-3 py-2 border dark:border-gray-600 rounded-lg dark:bg-gray-800 dark:text-gray-100"
+					placeholder="{$i18n.t('例如')}: 10"
+					required
+				/>
+				<div class="text-xs text-gray-500 dark:text-gray-400 mt-1">
+					{$i18n.t('当前')}: ¥{(outputPrice || 0).toFixed(2)}/M = {((outputPrice || 0) * 10000).toFixed(
+						0
+					)} {$i18n.t('毫')}/M
+				</div>
+			</div>
+
+			<!-- 预览 -->
+			<div class="mb-4 p-3 bg-blue-50 dark:bg-blue-900/20 rounded-lg text-sm">
+				<div class="font-medium mb-2">
+					{$i18n.t('计费预览')} ({$i18n.t('以')} 1000 tokens {$i18n.t('为例')})
+				</div>
+				<div class="space-y-1 text-xs">
+					<div>{$i18n.t('输入')}: ¥{((inputPrice || 0) * 0.001).toFixed(4)}</div>
+					<div>{$i18n.t('输出')}: ¥{((outputPrice || 0) * 0.001).toFixed(4)}</div>
+					<div class="font-medium">
+						{$i18n.t('总计')}: ¥{(((inputPrice || 0) + (outputPrice || 0)) * 0.001).toFixed(4)}
+					</div>
+				</div>
+			</div>
+
+			<!-- 按钮 -->
+			<div class="flex justify-end gap-2">
+				<button
+					type="button"
+					class="px-4 py-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700 dark:text-gray-300"
+					on:click={() => (show = false)}
+				>
+					{$i18n.t('取消')}
+				</button>
+				<button
+					type="submit"
+					class="px-4 py-2 rounded-lg bg-blue-600 hover:bg-blue-700 text-white"
+					disabled={loading}
+				>
+					{loading ? $i18n.t('保存中') + '...' : $i18n.t('保存')}
+				</button>
+			</div>
+		</form>
+	</div>
+</Modal>

src/lib/components/billing/BillingLogsTable.svelte

@@ -207,9 +207,17 @@
 										<span>实际消费:</span>
 										<span class="font-mono">{formatCurrency(log.cost, true)}</span>
 									</div>
-									<div class="flex justify-between text-green-600 dark:text-green-400">
-										<span>退款金额:</span>
-										<span class="font-mono">-{formatCurrency(log.refundAmount, true)}</span>
+									<div class="flex justify-between" class:text-green-600={log.refundAmount > 0} class:text-red-600={log.refundAmount < 0} class:dark:text-green-400={log.refundAmount > 0} class:dark:text-red-400={log.refundAmount < 0}>
+										<span>{log.refundAmount >= 0 ? '退款金额' : '补扣金额'}:</span>
+										<span class="font-mono">
+											{#if log.refundAmount > 0}
+												+{formatCurrency(log.refundAmount, true)}
+											{:else if log.refundAmount < 0}
+												{formatCurrency(log.refundAmount, true)}
+											{:else}
+												{formatCurrency(0, true)}
+											{/if}
+										</span>
 									</div>
 									{#if log.precharge_id}
 										<div class="flex justify-between pt-1 mt-1 border-t border-gray-200 dark:border-gray-700">