fix(openai): harden GPT-5.6 billing and usage

frontend/src/components/keys/UseKeyModal.vue

@@ -636,6 +636,23 @@ function generateOpenCodeConfig(platform: string, baseUrl: string, apiKey: strin
         xhigh: {}
       }
     },
+    'gpt-5.6': {
+      name: 'GPT-5.6 (Sol)',
+      limit: {
+        context: 1050000,
+        output: 128000
+      },
+      options: {
+        store: false
+      },
+      variants: {
+        low: {},
+        medium: {},
+        high: {},
+        xhigh: {},
+        max: {}
+      }
+    },
     'gpt-5.6-sol': {
       name: 'GPT-5.6 Sol',
       limit: {
@@ -649,7 +666,8 @@ function generateOpenCodeConfig(platform: string, baseUrl: string, apiKey: strin
         low: {},
         medium: {},
         high: {},
-        xhigh: {}
+        xhigh: {},
+        max: {}
       }
     },
     'gpt-5.6-terra': {
@@ -665,7 +683,8 @@ function generateOpenCodeConfig(platform: string, baseUrl: string, apiKey: strin
         low: {},
         medium: {},
         high: {},
-        xhigh: {}
+        xhigh: {},
+        max: {}
       }
     },
     'gpt-5.6-luna': {
@@ -681,7 +700,8 @@ function generateOpenCodeConfig(platform: string, baseUrl: string, apiKey: strin
         low: {},
         medium: {},
         high: {},
-        xhigh: {}
+        xhigh: {},
+        max: {}
       }
     },
     'gpt-5.5': {

frontend/src/components/keys/__tests__/UseKeyModal.spec.ts

@@ -123,6 +123,43 @@ describe('UseKeyModal', () => {
     expect(codeBlock.text()).not.toContain('"name": "GPT-5.4 Nano"')
   })
 
+  it('renders GPT-5.6 alias and max variants in OpenCode config', async () => {
+    const wrapper = mount(UseKeyModal, {
+      props: {
+        show: true,
+        apiKey: 'sk-test',
+        baseUrl: 'https://example.com/v1',
+        platform: 'openai'
+      },
+      global: {
+        stubs: {
+          BaseDialog: {
+            template: '<div><slot /><slot name="footer" /></div>'
+          },
+          Icon: {
+            template: '<span />'
+          }
+        }
+      }
+    })
+
+    const opencodeTab = wrapper.findAll('button').find((button) =>
+      button.text().includes('keys.useKeyModal.cliTabs.opencode')
+    )
+    expect(opencodeTab).toBeDefined()
+    await opencodeTab!.trigger('click')
+    await nextTick()
+
+    const parsed = JSON.parse(wrapper.find('pre code').text())
+    const models = parsed.provider.openai.models
+    for (const model of ['gpt-5.6', 'gpt-5.6-sol', 'gpt-5.6-terra', 'gpt-5.6-luna']) {
+      expect(models[model]).toBeDefined()
+      expect(models[model].variants).toHaveProperty('max')
+      expect(models[model].variants).toHaveProperty('xhigh')
+    }
+    expect(models['gpt-5.6'].name).toBe('GPT-5.6 (Sol)')
+  })
+
   it('renders Claude Fable 5 OpenCode config with adaptive thinking', async () => {
     const wrapper = mount(UseKeyModal, {
       props: {

frontend/src/composables/__tests__/useModelWhitelist.spec.ts

@@ -14,6 +14,7 @@ describe('useModelWhitelist', () => {
     expect(models).toContain('gpt-5.4-mini')
     expect(models).toContain('gpt-5.4-2026-03-05')
     expect(models).toContain('codex-auto-review')
+    expect(models).toContain('gpt-5.6')
   })
 
   it('openai 模型列表不再暴露已下线的 ChatGPT 登录 Codex 模型', () => {

frontend/src/composables/useModelWhitelist.ts

@@ -8,7 +8,7 @@ const openaiModels = [
   'gpt-5.2', 'gpt-5.2-2025-12-11', 'gpt-5.2-chat-latest',
   'gpt-5.2-pro', 'gpt-5.2-pro-2025-12-11',
   // GPT-5.6 系列
-  'gpt-5.6-sol', 'gpt-5.6-terra', 'gpt-5.6-luna',
+  'gpt-5.6', 'gpt-5.6-sol', 'gpt-5.6-terra', 'gpt-5.6-luna',
   // GPT-5.5 系列
   'gpt-5.5',
   // GPT-5.4 系列
@@ -280,6 +280,7 @@ const openaiPresetMappings = [
   { label: 'o3', from: 'o3', to: 'o3', color: 'bg-emerald-100 text-emerald-700 hover:bg-emerald-200 dark:bg-emerald-900/30 dark:text-emerald-400' },
   { label: 'GPT-5.3 Codex Spark', from: 'gpt-5.3-codex-spark', to: 'gpt-5.3-codex-spark', color: 'bg-teal-100 text-teal-700 hover:bg-teal-200 dark:bg-teal-900/30 dark:text-teal-400' },
   { label: 'GPT-5.2', from: 'gpt-5.2', to: 'gpt-5.2', color: 'bg-red-100 text-red-700 hover:bg-red-200 dark:bg-red-900/30 dark:text-red-400' },
+  { label: 'GPT-5.6', from: 'gpt-5.6', to: 'gpt-5.6', color: 'bg-amber-100 text-amber-700 hover:bg-amber-200 dark:bg-amber-900/30 dark:text-amber-400' },
   { label: 'GPT-5.6 Sol', from: 'gpt-5.6-sol', to: 'gpt-5.6-sol', color: 'bg-orange-100 text-orange-700 hover:bg-orange-200 dark:bg-orange-900/30 dark:text-orange-400' },
   { label: 'GPT-5.6 Terra', from: 'gpt-5.6-terra', to: 'gpt-5.6-terra', color: 'bg-lime-100 text-lime-700 hover:bg-lime-200 dark:bg-lime-900/30 dark:text-lime-400' },
   { label: 'GPT-5.6 Luna', from: 'gpt-5.6-luna', to: 'gpt-5.6-luna', color: 'bg-sky-100 text-sky-700 hover:bg-sky-200 dark:bg-sky-900/30 dark:text-sky-400' },