diff --git a/src/libs/Cohere/Generated/Cohere.Models.ChatMessageEndEventVariant2Delta.g.cs b/src/libs/Cohere/Generated/Cohere.Models.ChatMessageEndEventVariant2Delta.g.cs
index 20b0f24a..c0a6144f 100644
--- a/src/libs/Cohere/Generated/Cohere.Models.ChatMessageEndEventVariant2Delta.g.cs
+++ b/src/libs/Cohere/Generated/Cohere.Models.ChatMessageEndEventVariant2Delta.g.cs
@@ -8,6 +8,12 @@ namespace Cohere
     /// </summary>
     public sealed partial class ChatMessageEndEventVariant2Delta
     {
+        /// <summary>
+        /// An error message if an error occurred during the generation.
+        /// </summary>
+        [global::System.Text.Json.Serialization.JsonPropertyName("error")]
+        public string? Error { get; set; }
+
         /// <summary>
         /// The reason a chat request has finished.<br/>
         /// - **complete**: The model finished sending a complete message.<br/>
@@ -35,6 +41,9 @@ public sealed partial class ChatMessageEndEventVariant2Delta
         /// <summary>
         /// Initializes a new instance of the <see cref="ChatMessageEndEventVariant2Delta" /> class.
         /// </summary>
+        /// <param name="error">
+        /// An error message if an error occurred during the generation.
+        /// </param>
         /// <param name="finishReason">
         /// The reason a chat request has finished.<br/>
         /// - **complete**: The model finished sending a complete message.<br/>
@@ -48,9 +57,11 @@ public sealed partial class ChatMessageEndEventVariant2Delta
         [global::System.Diagnostics.CodeAnalysis.SetsRequiredMembers]
 #endif
         public ChatMessageEndEventVariant2Delta(
+            string? error,
             global::Cohere.ChatFinishReason? finishReason,
             global::Cohere.Usage? usage)
         {
+            this.Error = error;
             this.FinishReason = finishReason;
             this.Usage = usage;
         }
diff --git a/src/libs/Cohere/openapi.yaml b/src/libs/Cohere/openapi.yaml
index 713c8c28..1ba45563 100644
--- a/src/libs/Cohere/openapi.yaml
+++ b/src/libs/Cohere/openapi.yaml
@@ -11798,6 +11798,11 @@ components:
             delta:
               type: object
               properties:
+                error:
+                  type: string
+                  description: "An error message if an error occurred during the generation.\n"
+                  x-fern-audiences:
+                    - public
                 finish_reason:
                   $ref: '#/components/schemas/ChatFinishReason'
                 usage: