diff --git a/src/renderer/src/providers/AiProvider/OpenAIProvider.ts b/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
index f3a3f0685b..8d27569ee4 100644
--- a/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
+++ b/src/renderer/src/providers/AiProvider/OpenAIProvider.ts
@@ -550,12 +550,16 @@ export default class OpenAIProvider extends BaseOpenAIProvider {
         // Separate onChunk calls for text and usage/metrics
         let content = ''
         stream.choices.forEach((choice) => {
+          const reasoning = choice.message.reasoning || choice.message.reasoning_content
           // reasoning
-          if (choice.message.reasoning) {
-            onChunk({ type: ChunkType.THINKING_DELTA, text: choice.message.reasoning })
+          if (reasoning) {
+            onChunk({
+              type: ChunkType.THINKING_DELTA,
+              text: reasoning
+            })
             onChunk({
               type: ChunkType.THINKING_COMPLETE,
-              text: choice.message.reasoning,
+              text: reasoning,
               thinking_millsec: new Date().getTime() - start_time_millsec
             })
           }