diff --git a/src/resources/batches.ts b/src/resources/batches.ts
index d0bb891e..fb0470dc 100644
--- a/src/resources/batches.ts
+++ b/src/resources/batches.ts
@@ -57,7 +57,7 @@ export interface Batch {
   /**
    * The Unix timestamp (in seconds) for when the batch was created.
    */
-  created_at: string;
+  created_at: number;
 
   /**
    * The OpenAI API endpoint used by the batch.
@@ -90,17 +90,17 @@ export interface Batch {
   /**
    * The Unix timestamp (in seconds) for when the batch was cancelled.
    */
-  cancelled_at?: string;
+  cancelled_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch started cancelling.
    */
-  cancelling_at?: string;
+  cancelling_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch was completed.
    */
-  completed_at?: string;
+  completed_at?: number;
 
   /**
    * The ID of the file containing the outputs of requests with errors.
@@ -112,27 +112,27 @@ export interface Batch {
   /**
    * The Unix timestamp (in seconds) for when the batch expired.
    */
-  expired_at?: string;
+  expired_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch will expire.
    */
-  expires_at?: string;
+  expires_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch failed.
    */
-  failed_at?: string;
+  failed_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch started finalizing.
    */
-  finalizing_at?: string;
+  finalizing_at?: number;
 
   /**
    * The Unix timestamp (in seconds) for when the batch started processing.
    */
-  in_progress_at?: string;
+  in_progress_at?: number;
 
   /**
    * Set of 16 key-value pairs that can be attached to an object. This can be useful
@@ -225,8 +225,9 @@ export interface BatchCreateParams {
    * See [upload file](https://platform.openai.com/docs/api-reference/files/create)
    * for how to upload a file.
    *
-   * Your input file must be formatted as a JSONL file, and must be uploaded with the
-   * purpose `batch`.
+   * Your input file must be formatted as a
+   * [JSONL file](https://platform.openai.com/docs/api-reference/batch/requestInput),
+   * and must be uploaded with the purpose `batch`.
    */
   input_file_id: string;
 
diff --git a/src/resources/beta/vector-stores/files.ts b/src/resources/beta/vector-stores/files.ts
index 40b97e9a..a1821122 100644
--- a/src/resources/beta/vector-stores/files.ts
+++ b/src/resources/beta/vector-stores/files.ts
@@ -203,6 +203,12 @@ export interface VectorStoreFile {
    */
   status: 'in_progress' | 'completed' | 'cancelled' | 'failed';
 
+  /**
+   * The total vector store usage in bytes. Note that this may be different from the
+   * original file size.
+   */
+  usage_bytes: number;
+
   /**
    * The ID of the
    * [vector store](https://platform.openai.com/docs/api-reference/vector-stores/object)
diff --git a/src/resources/beta/vector-stores/vector-stores.ts b/src/resources/beta/vector-stores/vector-stores.ts
index 892d06aa..0409f3af 100644
--- a/src/resources/beta/vector-stores/vector-stores.ts
+++ b/src/resources/beta/vector-stores/vector-stores.ts
@@ -93,11 +93,6 @@ export interface VectorStore {
    */
   id: string;
 
-  /**
-   * The byte size of the vector store.
-   */
-  bytes: number;
-
   /**
    * The Unix timestamp (in seconds) for when the vector store was created.
    */
@@ -135,6 +130,11 @@ export interface VectorStore {
    */
   status: 'expired' | 'in_progress' | 'completed';
 
+  /**
+   * The total number of bytes used by the files in the vector store.
+   */
+  usage_bytes: number;
+
   /**
    * The expiration policy for a vector store.
    */