diff --git a/dist/index.js b/dist/index.js
index 53f411e55a4c9a06fd29bb4ab8161c4ad15980cd..71b91f196c8b886ed90dd237dec5625d79d5677e 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -12676,10 +12676,13 @@ var OpenAIResponsesLanguageModel = class {
                   }
                 });
               } else if (value.item.type === "message") {
-                controller.enqueue({
-                  type: "text-end",
-                  id: value.item.id
-                });
+                // Fix for gpt-5-codex: use currentTextId to ensure text-end matches text-start
+                if (currentTextId) {
+                  controller.enqueue({
+                    type: "text-end",
+                    id: currentTextId
+                  });
+                }
                 currentTextId = null;
               } else if (isResponseOutputItemDoneReasoningChunk(value)) {
                 const activeReasoningPart = activeReasoning[value.item.id];
diff --git a/dist/index.mjs b/dist/index.mjs
index 7719264da3c49a66c2626082f6ccaae6e3ef5e89..090fd8cf142674192a826148428ed6a0c4a54e35 100644
--- a/dist/index.mjs
+++ b/dist/index.mjs
@@ -12670,10 +12670,13 @@ var OpenAIResponsesLanguageModel = class {
                   }
                 });
               } else if (value.item.type === "message") {
-                controller.enqueue({
-                  type: "text-end",
-                  id: value.item.id
-                });
+                // Fix for gpt-5-codex: use currentTextId to ensure text-end matches text-start
+                if (currentTextId) {
+                  controller.enqueue({
+                    type: "text-end",
+                    id: currentTextId
+                  });
+                }
                 currentTextId = null;
               } else if (isResponseOutputItemDoneReasoningChunk(value)) {
                 const activeReasoningPart = activeReasoning[value.item.id];