diff --git a/backend/internal/pkg/antigravity/client.go b/backend/internal/pkg/antigravity/client.go
index 8b0ba6ec..3bcbf26b 100644
--- a/backend/internal/pkg/antigravity/client.go
+++ b/backend/internal/pkg/antigravity/client.go
@@ -215,20 +215,20 @@ func (c *Client) GetUserInfo(ctx context.Context, accessToken string) (*UserInfo
 	return &userInfo, nil
 }
 
-// LoadCodeAssist 获取 project_id
-func (c *Client) LoadCodeAssist(ctx context.Context, accessToken string) (*LoadCodeAssistResponse, error) {
+// LoadCodeAssist 获取账户信息，返回解析后的结构体和原始 JSON
+func (c *Client) LoadCodeAssist(ctx context.Context, accessToken string) (*LoadCodeAssistResponse, map[string]any, error) {
 	reqBody := LoadCodeAssistRequest{}
 	reqBody.Metadata.IDEType = "ANTIGRAVITY"
 
 	bodyBytes, err := json.Marshal(reqBody)
 	if err != nil {
-		return nil, fmt.Errorf("序列化请求失败: %w", err)
+		return nil, nil, fmt.Errorf("序列化请求失败: %w", err)
 	}
 
 	url := BaseURL + "/v1internal:loadCodeAssist"
 	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, strings.NewReader(string(bodyBytes)))
 	if err != nil {
-		return nil, fmt.Errorf("创建请求失败: %w", err)
+		return nil, nil, fmt.Errorf("创建请求失败: %w", err)
 	}
 	req.Header.Set("Authorization", "Bearer "+accessToken)
 	req.Header.Set("Content-Type", "application/json")
@@ -236,25 +236,29 @@ func (c *Client) LoadCodeAssist(ctx context.Context, accessToken string) (*LoadC
 
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
-		return nil, fmt.Errorf("loadCodeAssist 请求失败: %w", err)
+		return nil, nil, fmt.Errorf("loadCodeAssist 请求失败: %w", err)
 	}
 	defer func() { _ = resp.Body.Close() }()
 
 	respBodyBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return nil, fmt.Errorf("读取响应失败: %w", err)
+		return nil, nil, fmt.Errorf("读取响应失败: %w", err)
 	}
 
 	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("loadCodeAssist 失败 (HTTP %d): %s", resp.StatusCode, string(respBodyBytes))
+		return nil, nil, fmt.Errorf("loadCodeAssist 失败 (HTTP %d): %s", resp.StatusCode, string(respBodyBytes))
 	}
 
 	var loadResp LoadCodeAssistResponse
 	if err := json.Unmarshal(respBodyBytes, &loadResp); err != nil {
-		return nil, fmt.Errorf("响应解析失败: %w", err)
+		return nil, nil, fmt.Errorf("响应解析失败: %w", err)
 	}
 
-	return &loadResp, nil
+	// 解析原始 JSON 为 map
+	var rawResp map[string]any
+	_ = json.Unmarshal(respBodyBytes, &rawResp)
+
+	return &loadResp, rawResp, nil
 }
 
 // ModelQuotaInfo 模型配额信息
@@ -278,18 +282,18 @@ type FetchAvailableModelsResponse struct {
 	Models map[string]ModelInfo `json:"models"`
 }
 
-// FetchAvailableModels 获取可用模型和配额信息
-func (c *Client) FetchAvailableModels(ctx context.Context, accessToken, projectID string) (*FetchAvailableModelsResponse, error) {
+// FetchAvailableModels 获取可用模型和配额信息，返回解析后的结构体和原始 JSON
+func (c *Client) FetchAvailableModels(ctx context.Context, accessToken, projectID string) (*FetchAvailableModelsResponse, map[string]any, error) {
 	reqBody := FetchAvailableModelsRequest{Project: projectID}
 	bodyBytes, err := json.Marshal(reqBody)
 	if err != nil {
-		return nil, fmt.Errorf("序列化请求失败: %w", err)
+		return nil, nil, fmt.Errorf("序列化请求失败: %w", err)
 	}
 
 	apiURL := BaseURL + "/v1internal:fetchAvailableModels"
 	req, err := http.NewRequestWithContext(ctx, http.MethodPost, apiURL, strings.NewReader(string(bodyBytes)))
 	if err != nil {
-		return nil, fmt.Errorf("创建请求失败: %w", err)
+		return nil, nil, fmt.Errorf("创建请求失败: %w", err)
 	}
 	req.Header.Set("Authorization", "Bearer "+accessToken)
 	req.Header.Set("Content-Type", "application/json")
@@ -297,23 +301,27 @@ func (c *Client) FetchAvailableModels(ctx context.Context, accessToken, projectI
 
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
-		return nil, fmt.Errorf("fetchAvailableModels 请求失败: %w", err)
+		return nil, nil, fmt.Errorf("fetchAvailableModels 请求失败: %w", err)
 	}
 	defer func() { _ = resp.Body.Close() }()
 
 	respBodyBytes, err := io.ReadAll(resp.Body)
 	if err != nil {
-		return nil, fmt.Errorf("读取响应失败: %w", err)
+		return nil, nil, fmt.Errorf("读取响应失败: %w", err)
 	}
 
 	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("fetchAvailableModels 失败 (HTTP %d): %s", resp.StatusCode, string(respBodyBytes))
+		return nil, nil, fmt.Errorf("fetchAvailableModels 失败 (HTTP %d): %s", resp.StatusCode, string(respBodyBytes))
 	}
 
 	var modelsResp FetchAvailableModelsResponse
 	if err := json.Unmarshal(respBodyBytes, &modelsResp); err != nil {
-		return nil, fmt.Errorf("响应解析失败: %w", err)
+		return nil, nil, fmt.Errorf("响应解析失败: %w", err)
 	}
 
-	return &modelsResp, nil
+	// 解析原始 JSON 为 map
+	var rawResp map[string]any
+	_ = json.Unmarshal(respBodyBytes, &rawResp)
+
+	return &modelsResp, rawResp, nil
 }
diff --git a/backend/internal/service/antigravity_oauth_service.go b/backend/internal/service/antigravity_oauth_service.go
index 8192a9fb..9125999f 100644
--- a/backend/internal/service/antigravity_oauth_service.go
+++ b/backend/internal/service/antigravity_oauth_service.go
@@ -142,7 +142,7 @@ func (s *AntigravityOAuthService) ExchangeCode(ctx context.Context, input *Antig
 	}
 
 	// 获取 project_id（部分账户类型可能没有）
-	loadResp, err := client.LoadCodeAssist(ctx, tokenResp.AccessToken)
+	loadResp, _, err := client.LoadCodeAssist(ctx, tokenResp.AccessToken)
 	if err != nil {
 		fmt.Printf("[AntigravityOAuth] 警告: 获取 project_id 失败: %v\n", err)
 	} else if loadResp != nil && loadResp.CloudAICompanionProject != "" {
diff --git a/backend/internal/service/antigravity_quota_refresher.go b/backend/internal/service/antigravity_quota_refresher.go
index 8f63fa38..dd579ef1 100644
--- a/backend/internal/service/antigravity_quota_refresher.go
+++ b/backend/internal/service/antigravity_quota_refresher.go
@@ -145,10 +145,16 @@ func (r *AntigravityQuotaRefresher) refreshAccountQuota(ctx context.Context, acc
 
 	client := antigravity.NewClient(proxyURL)
 
-	// 获取账户类型（tier）和 project_id
-	loadResp, _ := client.LoadCodeAssist(ctx, accessToken)
+	if account.Extra == nil {
+		account.Extra = make(map[string]any)
+	}
+
+	// 获取账户信息（tier、project_id 等）
+	loadResp, loadRaw, _ := client.LoadCodeAssist(ctx, accessToken)
+	if loadRaw != nil {
+		account.Extra["load_code_assist"] = loadRaw
+	}
 	if loadResp != nil {
-		r.updateAccountTier(account, loadResp)
 		// 尝试从 API 获取 project_id
 		if projectID == "" && loadResp.CloudAICompanionProject != "" {
 			projectID = loadResp.CloudAICompanionProject
@@ -164,14 +170,21 @@ func (r *AntigravityQuotaRefresher) refreshAccountQuota(ctx context.Context, acc
 	}
 
 	// 调用 API 获取配额
-	modelsResp, err := client.FetchAvailableModels(ctx, accessToken, projectID)
+	modelsResp, modelsRaw, err := client.FetchAvailableModels(ctx, accessToken, projectID)
 	if err != nil {
-		return err
+		return r.accountRepo.Update(ctx, account) // 保存已有的 load_code_assist 信息
 	}
 
-	// 解析配额数据并更新 extra 字段
+	// 保存完整的配额响应
+	if modelsRaw != nil {
+		account.Extra["available_models"] = modelsRaw
+	}
+
+	// 解析配额数据为前端使用的格式
 	r.updateAccountQuota(account, modelsResp)
 
+	account.Extra["last_refresh"] = time.Now().Format(time.RFC3339)
+
 	// 保存到数据库
 	return r.accountRepo.Update(ctx, account)
 }
@@ -187,35 +200,8 @@ func (r *AntigravityQuotaRefresher) isTokenExpired(account *Account) bool {
 	return time.Now().Add(5 * time.Minute).After(*expiresAt)
 }
 
-// updateAccountTier 更新账户类型信息
-func (r *AntigravityQuotaRefresher) updateAccountTier(account *Account, loadResp *antigravity.LoadCodeAssistResponse) {
-	if account.Extra == nil {
-		account.Extra = make(map[string]any)
-	}
-
-	tier := loadResp.GetTier()
-	if tier != "" {
-		account.Extra["tier"] = tier
-	}
-
-	// 保存不符合条件的原因（如 INELIGIBLE_ACCOUNT）
-	if len(loadResp.IneligibleTiers) > 0 && loadResp.IneligibleTiers[0] != nil {
-		ineligible := loadResp.IneligibleTiers[0]
-		if ineligible.ReasonCode != "" {
-			account.Extra["ineligible_reason_code"] = ineligible.ReasonCode
-		}
-		if ineligible.ReasonMessage != "" {
-			account.Extra["ineligible_reason_message"] = ineligible.ReasonMessage
-		}
-	}
-}
-
-// updateAccountQuota 更新账户的配额信息
+// updateAccountQuota 更新账户的配额信息（前端使用的格式）
 func (r *AntigravityQuotaRefresher) updateAccountQuota(account *Account, modelsResp *antigravity.FetchAvailableModelsResponse) {
-	if account.Extra == nil {
-		account.Extra = make(map[string]any)
-	}
-
 	quota := make(map[string]any)
 
 	for modelName, modelInfo := range modelsResp.Models {
@@ -233,5 +219,4 @@ func (r *AntigravityQuotaRefresher) updateAccountQuota(account *Account, modelsR
 	}
 
 	account.Extra["quota"] = quota
-	account.Extra["last_quota_check"] = time.Now().Format(time.RFC3339)
 }
diff --git a/frontend/src/components/account/AccountUsageCell.vue b/frontend/src/components/account/AccountUsageCell.vue
index ea222c33..cbd93df8 100644
--- a/frontend/src/components/account/AccountUsageCell.vue
+++ b/frontend/src/components/account/AccountUsageCell.vue
@@ -403,11 +403,26 @@ const antigravityClaude45Usage = computed(() =>
   getAntigravityUsage(['claude-sonnet-4-5', 'claude-opus-4-5-thinking'])
 )
 
-// Antigravity 账户类型
+// Antigravity 账户类型（从 load_code_assist 响应中提取）
 const antigravityTier = computed(() => {
   const extra = props.account.extra as Record<string, unknown> | undefined
-  if (!extra || typeof extra.tier !== 'string') return null
-  return extra.tier as string
+  if (!extra) return null
+
+  const loadCodeAssist = extra.load_code_assist as Record<string, unknown> | undefined
+  if (!loadCodeAssist) return null
+
+  // 优先取 paidTier，否则取 currentTier
+  const paidTier = loadCodeAssist.paidTier as Record<string, unknown> | undefined
+  if (paidTier && typeof paidTier.id === 'string') {
+    return paidTier.id
+  }
+
+  const currentTier = loadCodeAssist.currentTier as Record<string, unknown> | undefined
+  if (currentTier && typeof currentTier.id === 'string') {
+    return currentTier.id
+  }
+
+  return null
 })
 
 // 账户类型显示标签