diff --git a/backend/docs/swagger.json b/backend/docs/swagger.json
index 6a064cb..d0d438c 100644
--- a/backend/docs/swagger.json
+++ b/backend/docs/swagger.json
@@ -2008,6 +2008,9 @@
                 },
                 "id": {
                     "type": "string"
+                },
+                "prompt": {
+                    "type": "string"
                 }
             }
         },
diff --git a/backend/domain/billing.go b/backend/domain/billing.go
index 64bee84..6a9c2c7 100644
--- a/backend/domain/billing.go
+++ b/backend/domain/billing.go
@@ -87,6 +87,7 @@ func (c *CompletionRecord) From(e *db.Task) *CompletionRecord {
 
 type CompletionInfo struct {
 	ID        string `json:"id"`
+	Prompt    string `json:"prompt"`
 	Content   string `json:"content"`
 	CreatedAt int64  `json:"created_at"`
 }
@@ -96,6 +97,7 @@ func (c *CompletionInfo) From(e *db.Task) *CompletionInfo {
 		return c
 	}
 	c.ID = e.TaskID
+	c.Prompt = e.Prompt
 	c.Content = e.Completion
 	c.CreatedAt = e.CreatedAt.Unix()
 	return c