diff --git a/public/index.html b/public/index.html
index 067921fa2..863257fd7 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1995,6 +1995,18 @@
                                             </span>
                                         </div>
                                     </div>
+                                    <div class="flex-container flexFlowColumn wide100p textAlignCenter marginTop10" data-source="openai">
+                                        <div class="flex-container oneline-dropdown" title="Constrains effort on reasoning for reasoning models.&#10;Currently supported values are low, medium, and high.&#10;Reducing reasoning effort can result in faster responses and fewer tokens used on reasoning in a response.">
+                                            <label for="openai_reasoning_effort" data-i18n="Reasoning Effort">
+                                                Reasoning Effort
+                                            </label>
+                                            <select id="openai_reasoning_effort">
+                                                <option data-i18n="openai_reasoning_effort_low" value="low">Low</option>
+                                                <option data-i18n="openai_reasoning_effort_medium" value="medium">Medium</option>
+                                                <option data-i18n="openai_reasoning_effort_high" value="high">High</option>
+                                            </select>
+                                        </div>
+                                    </div>
                                     <div class="range-block" data-source="claude">
                                         <div class="wide100p">
                                             <div class="flex-container alignItemsCenter">
diff --git a/public/scripts/openai.js b/public/scripts/openai.js
index 5e27446de..09e48c264 100644
--- a/public/scripts/openai.js
+++ b/public/scripts/openai.js
@@ -299,6 +299,7 @@ const default_settings = {
     continue_postfix: continue_postfix_types.SPACE,
     custom_prompt_post_processing: custom_prompt_post_processing_types.NONE,
     show_thoughts: true,
+    reasoning_effort: 'medium',
     seed: -1,
     n: 1,
 };
@@ -378,6 +379,7 @@ const oai_settings = {
     continue_postfix: continue_postfix_types.SPACE,
     custom_prompt_post_processing: custom_prompt_post_processing_types.NONE,
     show_thoughts: true,
+    reasoning_effort: 'medium',
     seed: -1,
     n: 1,
 };
@@ -1912,6 +1914,7 @@ async function sendOpenAIRequest(type, messages, signal) {
         'char_name': name2,
         'group_names': getGroupNames(),
         'include_reasoning': Boolean(oai_settings.show_thoughts),
+        'reasoning_effort': String(oai_settings.reasoning_effort),
     };
 
     // Empty array will produce a validation error
@@ -3122,6 +3125,7 @@ function loadOpenAISettings(data, settings) {
     oai_settings.inline_image_quality = settings.inline_image_quality ?? default_settings.inline_image_quality;
     oai_settings.bypass_status_check = settings.bypass_status_check ?? default_settings.bypass_status_check;
     oai_settings.show_thoughts = settings.show_thoughts ?? default_settings.show_thoughts;
+    oai_settings.reasoning_effort = settings.reasoning_effort ?? default_settings.reasoning_effort;
     oai_settings.seed = settings.seed ?? default_settings.seed;
     oai_settings.n = settings.n ?? default_settings.n;
 
@@ -3251,6 +3255,9 @@ function loadOpenAISettings(data, settings) {
     $('#n_openai').val(oai_settings.n);
     $('#openai_show_thoughts').prop('checked', oai_settings.show_thoughts);
 
+    $('#openai_reasoning_effort').val(oai_settings.reasoning_effort);
+    $(`#openai_reasoning_effort option[value="${oai_settings.reasoning_effort}"]`).prop('selected', true);
+
     if (settings.reverse_proxy !== undefined) oai_settings.reverse_proxy = settings.reverse_proxy;
     $('#openai_reverse_proxy').val(oai_settings.reverse_proxy);
 
@@ -3969,6 +3976,7 @@ function onSettingsPresetChange() {
         continue_postfix: ['#continue_postfix', 'continue_postfix', false],
         function_calling: ['#openai_function_calling', 'function_calling', true],
         show_thoughts: ['#openai_show_thoughts', 'show_thoughts', true],
+        reasoning_effort: ['#openai_reasoning_effort', 'reasoning_effort', false],
         seed: ['#seed_openai', 'seed', false],
         n: ['#n_openai', 'n', false],
     };
@@ -5510,6 +5518,11 @@ export function initOpenAI() {
         saveSettingsDebounced();
     });
 
+    $('#openai_reasoning_effort').on('input', function () {
+        oai_settings.reasoning_effort = String($(this).val());
+        saveSettingsDebounced();
+    });
+
     if (!CSS.supports('field-sizing', 'content')) {
         $(document).on('input', '#openai_settings .autoSetHeight', function () {
             resetScrollHeight($(this));
diff --git a/public/style.css b/public/style.css
index d70ca43a5..d854c48cc 100644
--- a/public/style.css
+++ b/public/style.css
@@ -5914,3 +5914,15 @@ body:not(.movingUI) .drawer-content.maximized {
 .mes_text div[data-type="assistant_note"]:has(.assistant_note_export)>div:not(.assistant_note_export) {
     flex: 1;
 }
+
+.oneline-dropdown label {
+    margin-top: 3px;
+    margin-bottom: 5px;
+    flex-grow: 1;
+    text-align: left;
+}
+
+.oneline-dropdown select {
+    min-width: fit-content;
+    width: 40%;
+}