fix: refine price index change feed

Author: guanchen.lin

src/app/[locale]/reports/api-price-index/page.tsx

@@ -131,7 +131,7 @@ export default async function ApiPriceIndexPage({
             <p className="mt-3 leading-7 text-zinc-600 dark:text-zinc-400">
               {locale === 'zh'
                 ? '每个主模型只保留当前最低价渠道。美元值仅用于排序，账单仍以供应商显示的原始币种为准。'
-                : 'Each primary model is represented by its lowest current channel. The USD value is only for ranking; billing remains in the provider’s displayed currency.'}
+                : 'Each model identifier is represented by its lowest current channel. The USD value is only for ranking; billing remains in the provider’s displayed currency.'}
             </p>
           </div>
           <div className="mt-6 overflow-x-auto rounded-md border bg-white dark:bg-zinc-900">
@@ -172,8 +172,8 @@ export default async function ApiPriceIndexPage({
             </h2>
             <p className="mt-3 leading-7 text-zinc-600 dark:text-zinc-400">
               {locale === 'zh'
-                ? '以下记录来自价格历史表，仅在抓取器发现显著变化时写入。'
-                : 'These records come from the price history log, written when the collector detects a material change.'}
+                ? '以下为价格历史表中每个渠道最近一次显著价格变化。'
+                : 'These records show the latest material change for each channel in the price history log.'}
             </p>
           </div>
           {snapshot.recentChanges.length > 0 ? (

src/lib/api-price-index.ts

@@ -86,17 +86,25 @@ export async function getPriceIndexSnapshot(): Promise<PriceIndexSnapshot> {
       WHERE m.type ILIKE '%llm%' AND cp.input_price_per_1m > 0
     `,
     sql<ChangeRow[]>`
-      SELECT m.name AS model_name, m.slug AS model_slug,
-             p.name AS provider_name, p.slug AS provider_slug,
-             ph.old_input_price, ph.new_input_price,
-             ph.old_output_price, ph.new_output_price,
-             ph.change_percent, ph.currency, ph.recorded_at
-      FROM price_history ph
-      JOIN api_channel_prices cp ON cp.id = ph.channel_price_id
-      JOIN models m ON m.id = cp.model_id
-      JOIN providers p ON p.id = cp.provider_id
-      WHERE m.type ILIKE '%llm%'
-      ORDER BY ph.recorded_at DESC
+      SELECT model_name, model_slug, provider_name, provider_slug,
+             old_input_price, new_input_price, old_output_price,
+             new_output_price, change_percent, currency, recorded_at
+      FROM (
+        SELECT DISTINCT ON (ph.channel_price_id)
+               m.name AS model_name, m.slug AS model_slug,
+               p.name AS provider_name, p.slug AS provider_slug,
+               ph.old_input_price, ph.new_input_price,
+               ph.old_output_price, ph.new_output_price,
+               ph.change_percent, ph.currency, ph.recorded_at,
+               ph.channel_price_id
+        FROM price_history ph
+        JOIN api_channel_prices cp ON cp.id = ph.channel_price_id
+        JOIN models m ON m.id = cp.model_id
+        JOIN providers p ON p.id = cp.provider_id
+        WHERE m.type ILIKE '%llm%'
+        ORDER BY ph.channel_price_id, ph.recorded_at DESC
+      ) latest_channel_changes
+      ORDER BY recorded_at DESC
       LIMIT 12
     `,
   ]);

src/lib/model-names.test.ts

@@ -7,6 +7,9 @@ test('formats common model slugs as readable product names', () => {
   assert.equal(formatModelName('claude-opus-4.8'), 'Claude Opus 4.8');
   assert.equal(formatModelName('glm-5.2-(free)'), 'GLM 5.2 (Free)');
   assert.equal(formatModelName('qwen3.5-397b-a17b'), 'Qwen3.5 397B A17B');
+  assert.equal(formatModelName('zai-glm-5-2'), 'Z.ai GLM 5.2');
+  assert.equal(formatModelName('gpt-oss-120b'), 'GPT OSS 120B');
+  assert.equal(formatModelName('qwen3-vl-flash'), 'Qwen3 VL Flash');
 });
 
 test('preserves already-readable numeric and mixed-case labels', () => {

src/lib/model-names.ts

@@ -16,7 +16,10 @@ const TOKEN_LABELS: Record<string, string> = {
   mistral: 'Mistral',
   mixtral: 'Mixtral',
   openai: 'OpenAI',
+  oss: 'OSS',
   qwen: 'Qwen',
+  vl: 'VL',
+  zai: 'Z.ai',
 };
 
 function formatToken(token: string): string {
@@ -39,8 +42,13 @@ export function formatModelName(value: string): string {
   const trimmed = value.trim();
   if (!trimmed) return value;
 
-  return trimmed
+  const normalized = trimmed
     .replace(/_/g, '-')
+    .replace(/\b(glm|gpt)-(\d+)-(\d+)(?=$|-)/gi, '$1-$2.$3')
+    .replace(/\b((?:claude-)?(?:opus|sonnet|haiku))-(\d+)-(\d+)(?=$|-)/gi, '$1-$2.$3')
+    .replace(/\b(k\d+)-(\d+)(?=$|-)/gi, '$1.$2');
+
+  return normalized
     .split('-')
     .filter(Boolean)
     .map(formatToken)