diff --git a/src/backend/src/modules/puterai/AIChatService.js b/src/backend/src/modules/puterai/AIChatService.js
index 0bad5e0308..a71e6a9de4 100644
--- a/src/backend/src/modules/puterai/AIChatService.js
+++ b/src/backend/src/modules/puterai/AIChatService.js
@@ -396,7 +396,7 @@ class AIChatService extends BaseService {
                 if ( model_max_tokens ) {
                     parameters.max_tokens = Math.floor(Math.min(parameters.max_tokens ?? Number.POSITIVE_INFINITY,
                                     max_allowed_output_tokens,
-                                    model_max_tokens));
+                                    model_max_tokens - (Math.ceil(text.length / 4))));
                 }
                 try {
                     ret = await svc_driver.call_new_({
diff --git a/src/backend/src/modules/puterai/OpenRouterService.js b/src/backend/src/modules/puterai/OpenRouterService.js
index 150a8ee740..520eb2692f 100644
--- a/src/backend/src/modules/puterai/OpenRouterService.js
+++ b/src/backend/src/modules/puterai/OpenRouterService.js
@@ -126,8 +126,7 @@ class OpenRouterService extends BaseService {
                 const actor = Context.get('actor');
 
                 messages = await OpenAIUtil.process_input_messages(messages);
-
-                const completion = await this.openai.chat.completions.create({
+                const sdk_params = {
                     messages,
                     model: model ?? this.get_default_model(),
                     ...(tools ? { tools } : {}),
@@ -137,7 +136,9 @@ class OpenRouterService extends BaseService {
                     ...(stream ? {
                         stream_options: { include_usage: true },
                     } : {}),
-                });
+                }
+
+                const completion = await this.openai.chat.completions.create(sdk_params);
 
                 const modelDetails =  (await this.models_()).find(m => m.id === 'openrouter:' + model);
                 const rawPriceModelDetails =  (await this.models_(true)).find(m => m.id === 'openrouter:' + model);
diff --git a/src/backend/src/modules/puterai/lib/OpenAIUtil.js b/src/backend/src/modules/puterai/lib/OpenAIUtil.js
index 6f21510896..52d8305674 100644
--- a/src/backend/src/modules/puterai/lib/OpenAIUtil.js
+++ b/src/backend/src/modules/puterai/lib/OpenAIUtil.js
@@ -120,8 +120,9 @@ const create_chat_stream_handler = ({
 
         const choice = chunk.choices[0];
 
-        if ( choice.delta.reasoning_content ){
-            textblock.addReasoning(choice.delta.reasoning_content);
+        // Deepseek returns choice.delta.reasoning_content, openrouter returns choice.delta.reasoning.
+        if ( choice.delta.reasoning_content || choice.delta.reasoning ) {
+            textblock.addReasoning(choice.delta.reasoning_content || choice.delta.reasoning);
             // Q: Why don't "continue" to next chunk here?
             // A: For now, reasoning_content and content never appear together, but I’m not sure if they’ll always be mutually exclusive.
         }