diff --git a/src/lib/Chat.svelte b/src/lib/Chat.svelte
index 5b6c278..5611b19 100644
--- a/src/lib/Chat.svelte
+++ b/src/lib/Chat.svelte
@@ -2,7 +2,15 @@
   //import { fetchEventSource } from "@microsoft/fetch-event-source";
 
   import { apiKeyStorage, chatsStorage, addMessage, clearMessages } from "./Storage.svelte";
-  import type { Request, Response, Message, Settings } from "./Types.svelte";
+  import {
+    type Request,
+    type Response,
+    type Message,
+    type Settings,
+    supportedModels,
+    type ResponseModels,
+    type SettingsSelect,
+  } from "./Types.svelte";
   import Code from "./Code.svelte";
 
   import { afterUpdate, onMount } from "svelte";
@@ -19,40 +27,65 @@
   let recording = false;
 
   const settingsMap: Settings[] = [
+    {
+      key: "model",
+      name: "Model",
+      default: "gpt-3.5-turbo",
+      options: supportedModels,
+      type: "select",
+    },
     {
       key: "temperature",
       name: "Sampling Temperature",
       default: 1,
+      min: 0,
+      max: 2,
+      step: 0.1,
       type: "number",
     },
     {
       key: "top_p",
       name: "Nucleus Sampling",
       default: 1,
+      min: 0,
+      max: 1,
+      step: 0.1,
       type: "number",
     },
     {
       key: "n",
       name: "Number of Messages",
       default: 1,
+      min: 1,
+      max: 10,
+      step: 1,
       type: "number",
     },
     {
       key: "max_tokens",
       name: "Max Tokens",
       default: 0,
+      min: 0,
+      max: 32768,
+      step: 1024,
       type: "number",
     },
     {
       key: "presence_penalty",
       name: "Presence Penalty",
       default: 0,
+      min: -2,
+      max: 2,
+      step: 0.2,
       type: "number",
     },
     {
       key: "frequency_penalty",
       name: "Frequency Penalty",
       default: 0,
+      min: -2,
+      max: 2,
+      step: 0.2,
       type: "number",
     },
   ];
@@ -61,7 +94,7 @@
   const token_price = 0.000002; // $0.002 per 1000 tokens
 
   // Focus the input on mount
-  onMount(() => {
+  onMount(async () => {
     input.focus();
 
     // Try to detect speech recognition support
@@ -237,8 +270,23 @@
     }
   };
 
-  const showSettings = () => {
+  const showSettings = async () => {
     settings.classList.add("is-active");
+
+    // Load available models from OpenAI
+    const allModels = (await (
+      await fetch("https://api.openai.com/v1/models", {
+        method: "GET",
+        headers: {
+          Authorization: `Bearer ${$apiKeyStorage}`,
+          "Content-Type": "application/json",
+        },
+      })
+    ).json()) as ResponseModels;
+    const filteredModels = supportedModels.filter((model) => allModels.data.find((m) => m.id === model));
+
+    // Update the models in the settings
+    (settingsMap[0] as SettingsSelect).options = filteredModels;
   };
 
   const closeSettings = () => {
@@ -431,16 +479,29 @@
       {#each settingsMap as setting}
         <div class="field is-horizontal">
           <div class="field-label is-normal">
-            <label class="label" for="settings-temperature">{setting.name}</label>
+            <label class="label" for="settings-{setting.key}">{setting.name}</label>
           </div>
           <div class="field-body">
             <div class="field">
-              <input
-                class="input"
-                type={setting.type}
-                id="settings-{setting.key}"
-                placeholder={String(setting.default)}
-              />
+              {#if setting.type === "number"}
+                <input
+                  class="input"
+                  type={setting.type}
+                  id="settings-{setting.key}"
+                  min={setting.min}
+                  max={setting.max}
+                  step={setting.step}
+                  placeholder={String(setting.default)}
+                />
+              {:else if setting.type === "select"}
+                <div class="select">
+                  <select id="settings-{setting.key}">
+                    {#each setting.options as option}
+                      <option value={option} selected={option == setting.default}>{option}</option>
+                    {/each}
+                  </select>
+                </div>
+              {/if}
             </div>
           </div>
         </div>
diff --git a/src/lib/Types.svelte b/src/lib/Types.svelte
index 94706ad..8b5c35b 100644
--- a/src/lib/Types.svelte
+++ b/src/lib/Types.svelte
@@ -32,12 +32,35 @@
     user?: string;
   };
 
+  // See: https://platform.openai.com/docs/models/model-endpoint-compatibility
+  export const supportedModels = [
+    "gpt-4",
+    "gpt-4-0314",
+    "gpt-4-32k",
+    "gpt-4-32k-0314",
+    "gpt-3.5-turbo",
+    "gpt-3.5-turbo-0301",
+  ];
+  type Model = typeof supportedModels[number];
+
+  type SettingsNumber = {
+    type: "number";
+    default: number;
+    min: number;
+    max: number;
+    step: number;
+  };
+
+  export type SettingsSelect = {
+    type: "select";
+    default: Model;
+    options: Model[];
+  };
+
   export type Settings = {
     key: string;
     name: string;
-    default: number;
-    type: "number";
-  };
+  } & (SettingsNumber | SettingsSelect);
 
   type ResponseOK = {
     id: string;
@@ -61,4 +84,11 @@
   };
 
   export type Response = ResponseOK & ResponseError;
+
+  export type ResponseModels = {
+    object: "list";
+    data: {
+      id: string;
+    }[];
+  };
 </script>