diff --git a/dist/index.js b/dist/index.js
index f33510a50d11a2cb92a90ea70cc0ac84c89f29b9..e887a60352c0c08ab794b1e6821854dfeefd20cc 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -2110,7 +2110,12 @@ var OpenRouterChatLanguageModel = class {
               if (reasoningStarted && !textStarted) {
                 controller.enqueue({
                   type: "reasoning-end",
-                  id: reasoningId || generateId()
+                  id: reasoningId || generateId(),
+                  providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                    openrouter: {
+                      reasoning_details: accumulatedReasoningDetails
+                    }
+                  } : undefined
                 });
                 reasoningStarted = false;
               }
@@ -2307,7 +2312,12 @@ var OpenRouterChatLanguageModel = class {
             if (reasoningStarted) {
               controller.enqueue({
                 type: "reasoning-end",
-                id: reasoningId || generateId()
+                id: reasoningId || generateId(),
+                providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                  openrouter: {
+                    reasoning_details: accumulatedReasoningDetails
+                  }
+                } : undefined
               });
             }
             if (textStarted) {
diff --git a/dist/index.mjs b/dist/index.mjs
index 8a688331b88b4af738ee4ca8062b5f24124d3d81..6310cb8b7c8d0a728d86e1eed09906c6b4c91ae2 100644
--- a/dist/index.mjs
+++ b/dist/index.mjs
@@ -2075,7 +2075,12 @@ var OpenRouterChatLanguageModel = class {
               if (reasoningStarted && !textStarted) {
                 controller.enqueue({
                   type: "reasoning-end",
-                  id: reasoningId || generateId()
+                  id: reasoningId || generateId(),
+                  providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                    openrouter: {
+                      reasoning_details: accumulatedReasoningDetails
+                    }
+                  } : undefined
                 });
                 reasoningStarted = false;
               }
@@ -2272,7 +2277,12 @@ var OpenRouterChatLanguageModel = class {
             if (reasoningStarted) {
               controller.enqueue({
                 type: "reasoning-end",
-                id: reasoningId || generateId()
+                id: reasoningId || generateId(),
+                providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                  openrouter: {
+                    reasoning_details: accumulatedReasoningDetails
+                  }
+                } : undefined
               });
             }
             if (textStarted) {
diff --git a/dist/internal/index.js b/dist/internal/index.js
index d40fa66125941155ac13a4619503caba24d89f8a..8dd86d1b473f2fa31c1acd9881d72945b294a197 100644
--- a/dist/internal/index.js
+++ b/dist/internal/index.js
@@ -2064,7 +2064,12 @@ var OpenRouterChatLanguageModel = class {
               if (reasoningStarted && !textStarted) {
                 controller.enqueue({
                   type: "reasoning-end",
-                  id: reasoningId || generateId()
+                  id: reasoningId || generateId(),
+                  providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                    openrouter: {
+                      reasoning_details: accumulatedReasoningDetails
+                    }
+                  } : undefined
                 });
                 reasoningStarted = false;
               }
@@ -2261,7 +2266,12 @@ var OpenRouterChatLanguageModel = class {
             if (reasoningStarted) {
               controller.enqueue({
                 type: "reasoning-end",
-                id: reasoningId || generateId()
+                id: reasoningId || generateId(),
+                providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                  openrouter: {
+                    reasoning_details: accumulatedReasoningDetails
+                  }
+                } : undefined
               });
             }
             if (textStarted) {
diff --git a/dist/internal/index.mjs b/dist/internal/index.mjs
index b0ed9d113549c5c55ea3b1e08abb3db6f92ae5a7..5695930a8e038facc071d58a4179a369a29be9c7 100644
--- a/dist/internal/index.mjs
+++ b/dist/internal/index.mjs
@@ -2030,7 +2030,12 @@ var OpenRouterChatLanguageModel = class {
               if (reasoningStarted && !textStarted) {
                 controller.enqueue({
                   type: "reasoning-end",
-                  id: reasoningId || generateId()
+                  id: reasoningId || generateId(),
+                  providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                    openrouter: {
+                      reasoning_details: accumulatedReasoningDetails
+                    }
+                  } : undefined
                 });
                 reasoningStarted = false;
               }
@@ -2227,7 +2232,12 @@ var OpenRouterChatLanguageModel = class {
             if (reasoningStarted) {
               controller.enqueue({
                 type: "reasoning-end",
-                id: reasoningId || generateId()
+                id: reasoningId || generateId(),
+                providerMetadata: accumulatedReasoningDetails.length > 0 ? {
+                  openrouter: {
+                    reasoning_details: accumulatedReasoningDetails
+                  }
+                } : undefined
               });
             }
             if (textStarted) {
