diff --git a/src/renderer/src/aiCore/chunk/AiSdkToChunkAdapter.ts b/src/renderer/src/aiCore/chunk/AiSdkToChunkAdapter.ts
index c27362eb14..8e35496ae6 100644
--- a/src/renderer/src/aiCore/chunk/AiSdkToChunkAdapter.ts
+++ b/src/renderer/src/aiCore/chunk/AiSdkToChunkAdapter.ts
@@ -170,7 +170,7 @@ export class AiSdkToChunkAdapter {
       case 'reasoning-end':
         this.onChunk({
           type: ChunkType.THINKING_COMPLETE,
-          text: (chunk.providerMetadata?.metadata?.thinking_content as string) || '',
+          text: (chunk.providerMetadata?.metadata?.thinking_content as string) || final.reasoningContent,
           thinking_millsec: (chunk.providerMetadata?.metadata?.thinking_millsec as number) || 0
         })
         final.reasoningContent = ''
diff --git a/src/renderer/src/aiCore/middleware/AiSdkMiddlewareBuilder.ts b/src/renderer/src/aiCore/middleware/AiSdkMiddlewareBuilder.ts
index 1f18e49bad..20b89cf2e5 100644
--- a/src/renderer/src/aiCore/middleware/AiSdkMiddlewareBuilder.ts
+++ b/src/renderer/src/aiCore/middleware/AiSdkMiddlewareBuilder.ts
@@ -143,12 +143,14 @@ export function buildAiSdkMiddlewares(config: AiSdkMiddlewareConfig): LanguageMo
 const tagName = {
   reasoning: 'reasoning',
   think: 'think',
-  thought: 'thought'
+  thought: 'thought',
+  seedThink: 'seed:think'
 }
 
 function getReasoningTagName(modelId: string | undefined): string {
   if (modelId?.includes('gpt-oss')) return tagName.reasoning
   if (modelId?.includes('gemini')) return tagName.thought
+  if (modelId?.includes('seed-oss-36b')) return tagName.seedThink
   return tagName.think
 }
 
diff --git a/src/renderer/src/aiCore/utils/reasoning.ts b/src/renderer/src/aiCore/utils/reasoning.ts
index 18f303c0a3..9328f7f0ce 100644
--- a/src/renderer/src/aiCore/utils/reasoning.ts
+++ b/src/renderer/src/aiCore/utils/reasoning.ts
@@ -52,7 +52,7 @@ export function getReasoningEffort(assistant: Assistant, model: Model): Reasonin
         return {}
       }
       // Don't disable reasoning for models that require it
-      if (isGrokReasoningModel(model) || isOpenAIReasoningModel(model)) {
+      if (isGrokReasoningModel(model) || isOpenAIReasoningModel(model) || model.id.includes('seed-oss')) {
         return {}
       }
       return { reasoning: { enabled: false, exclude: true } }
diff --git a/src/renderer/src/config/models/reasoning.ts b/src/renderer/src/config/models/reasoning.ts
index 25f13c86e4..607df8fd95 100644
--- a/src/renderer/src/config/models/reasoning.ts
+++ b/src/renderer/src/config/models/reasoning.ts
@@ -391,7 +391,8 @@ export function isReasoningModel(model?: Model): boolean {
     isDeepSeekHybridInferenceModel(model) ||
     modelId.includes('magistral') ||
     modelId.includes('minimax-m1') ||
-    modelId.includes('pangu-pro-moe')
+    modelId.includes('pangu-pro-moe') ||
+    modelId.includes('seed-oss')
   ) {
     return true
   }