diff --git a/public/index.html b/public/index.html
index 4dbcf243c..f708229d4 100644
--- a/public/index.html
+++ b/public/index.html
@@ -2048,11 +2048,11 @@
                                             </span>
                                         </div>
                                     </div>
-                                    <div class="flex-container flexFlowColumn wide100p textAlignCenter marginTop10" data-source="openai,custom,claude,xai,makersuite">
+                                    <div class="flex-container flexFlowColumn wide100p textAlignCenter marginTop10" data-source="openai,custom,claude,xai,makersuite,openrouter">
                                         <div class="flex-container oneline-dropdown" title="Constrains effort on reasoning for reasoning models.&#10;Reducing reasoning effort can result in faster responses and fewer tokens used on reasoning in a response." data-i18n="[title]Constrains effort on reasoning for reasoning models.">
                                             <label for="openai_reasoning_effort">
                                                 <span data-i18n="Reasoning Effort">Reasoning Effort</span>
-                                                <i data-source="openai,custom,xai" class="opacity50p fa-solid fa-circle-info" title="OpenAI-style options: low, medium, high. Minimum and maximum are aliased to low and high. Auto does not send an effort level."></i>
+                                                <i data-source="openai,custom,xai,openrouter" class="opacity50p fa-solid fa-circle-info" title="OpenAI-style options: low, medium, high. Minimum and maximum are aliased to low and high. Auto does not send an effort level."></i>
                                                 <i data-source="claude,makersuite" class="opacity50p fa-solid fa-circle-info" title="Allocates a portion of the response length for thinking (low: 10%, medium: 25%, high: 50%). Other options are model-dependent."></i>
                                             </label>
                                             <select id="openai_reasoning_effort">
diff --git a/public/scripts/openai.js b/public/scripts/openai.js
index c58cb563d..cc167f964 100644
--- a/public/scripts/openai.js
+++ b/public/scripts/openai.js
@@ -1952,6 +1952,7 @@ function getReasoningEffort() {
         chat_completion_sources.OPENAI,
         chat_completion_sources.CUSTOM,
         chat_completion_sources.XAI,
+        chat_completion_sources.OPENROUTER,
     ];
 
     if (!reasoningEffortSources.includes(oai_settings.chat_completion_source)) {
diff --git a/src/endpoints/backends/chat-completions.js b/src/endpoints/backends/chat-completions.js
index ad9557e11..e61dd16bf 100644
--- a/src/endpoints/backends/chat-completions.js
+++ b/src/endpoints/backends/chat-completions.js
@@ -1225,6 +1225,10 @@ router.post('/generate', function (request, response) {
             bodyParams['route'] = 'fallback';
         }
 
+        if (request.body.reasoning_effort) {
+            bodyParams['reasoning'] = { effort: request.body.reasoning_effort };
+        }
+
         let cachingAtDepth = getConfigValue('claude.cachingAtDepth', -1, 'number');
         if (Number.isInteger(cachingAtDepth) && cachingAtDepth >= 0 && request.body.model?.startsWith('anthropic/claude-3')) {
             cachingAtDepthForOpenRouterClaude(request.body.messages, cachingAtDepth);