diff --git a/public/index.html b/public/index.html
index 13b61e0dc..8b98ceb48 100644
--- a/public/index.html
+++ b/public/index.html
@@ -3028,6 +3028,9 @@
                             <div>
                                 <h4 data-i18n="OpenAI Model">OpenAI Model</h4>
                                 <select id="model_openai_select">
+                                    <optgroup label="GPT-5.4">
+                                        <option value="gpt-5.4">gpt-5.4</option>
+                                    </optgroup>
                                     <optgroup label="GPT-5.3">
                                         <option value="gpt-5.3-chat-latest">gpt-5.3-chat-latest</option>
                                     </optgroup>
diff --git a/public/scripts/extensions/caption/settings.html b/public/scripts/extensions/caption/settings.html
index 30ea9cddd..fe0c2a3c6 100644
--- a/public/scripts/extensions/caption/settings.html
+++ b/public/scripts/extensions/caption/settings.html
@@ -53,6 +53,7 @@
                         <option data-type="cohere" value="c4ai-aya-vision-8b">c4ai-aya-vision-8b</option>
                         <option data-type="cohere" value="c4ai-aya-vision-32b">c4ai-aya-vision-32b</option>
                         <option data-type="cohere" value="command-a-vision-07-2025">command-a-vision-07-2025</option>
+                        <option data-type="openai" value="gpt-5.4">gpt-5.4</option>
                         <option data-type="openai" value="gpt-5.3-chat-latest">gpt-5.3-chat-latest</option>
                         <option data-type="openai" value="gpt-5.2">gpt-5.2</option>
                         <option data-type="openai" value="gpt-5.2-2025-12-11">gpt-5.2-2025-12-11</option>
diff --git a/public/scripts/openai.js b/public/scripts/openai.js
index ffb34cc2b..6177f8f9e 100644
--- a/public/scripts/openai.js
+++ b/public/scripts/openai.js
@@ -2859,7 +2859,7 @@ export async function createGenerationParameters(settings, model, type, messages
         if (/gpt-5-chat-latest/.test(model)) {
             delete generate_data.tools;
             delete generate_data.tool_choice;
-        } else if (/gpt-5\.(1|2|3)/.test(model) && !/chat-latest/.test(model)) {
+        } else if (/gpt-5\.(1|2|3|4)/.test(model) && !/chat-latest/.test(model)) {
             delete generate_data.frequency_penalty;
             delete generate_data.presence_penalty;
             delete generate_data.logit_bias;
@@ -4789,6 +4789,8 @@ function onSettingsPresetChange() {
 function getMaxContextOpenAI(value) {
     if (oai_settings.max_context_unlocked) {
         return unlocked_max;
+    } else if (value.startsWith('gpt-5.4')) {
+        return max_1mil;
     } else if (value.startsWith('gpt-5')) {
         return max_400k;
     } else if (value.includes('gpt-4.1')) {
diff --git a/src/constants.js b/src/constants.js
index 79c0f440f..f27ff45d5 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -477,6 +477,7 @@ export const OPENAI_REASONING_EFFORT_MODELS = [
     'gpt-5.2-2025-12-11',
     'gpt-5.2-chat-latest',
     'gpt-5.3-chat-latest',
+    'gpt-5.4',
 ];
 
 export const OPENAI_REASONING_EFFORT_MAP = {