feat: support custom OpenAI endpoint and model

package.json

@@ -168,6 +168,11 @@
           "default": 0,
           "description": "Starting point of the column containing the tag description (if any, e.g. AI-generated).\n0 to make it adaptive (default, no alignment), a positive number to fix the starting point.\nNote that if the tag previous values take over the specified starting point, the column will be shifted."
         },
+        "jsdoc-generator.generativeEndpoint": {
+          "type": "string",
+          "default": "",
+          "description": "Set your own OpenAI server endpoint for generative AI.\nIt's required only if you wish to use the automatic generation of descriptions."
+        },
         "jsdoc-generator.generativeApiKey": {
           "type": "string",
           "default": "",
@@ -176,6 +181,7 @@
         "jsdoc-generator.generativeModel": {
           "type": "string",
           "enum": [
+            "custom",
             "gpt-5",
             "gpt-5-mini",
             "gpt-5-nano",
@@ -188,7 +194,12 @@
             "gpt-o3-mini"
           ],
           "default": "gpt-5",
-          "description": "Generative AI model to use to generate JSDoc decriptions.\nCurrently, only OpenAI models are supported.\nEnable the model with an API key."
+          "description": "Generative AI model to use to generate JSDoc decriptions.\nFor more models, please select 'custom'.\nEnable the model with an API key."
+        },
+        "jsdoc-generator.generativeModelCustom": {
+          "type": "string",
+          "default": "",
+          "description": "Custom generative AI model to use to generate JSDoc decriptions. Only Enabled while generativeModel select 'custom'."
         },
         "jsdoc-generator.generativeLanguage": {
           "type": "string",

src/GenerativeAPI.ts

@@ -33,6 +33,17 @@ abstract class GenerativeModel<T> {
     return getConfig('generativeLanguage', 'English');
   }
 
+  /**
+   * AI endpoint.
+   *
+   * @protected
+   * @readonly
+   * @type {string}
+   */
+  protected get baseURL() {
+    return getConfig('generativeEndpoint', '://api.openai.com/v1');
+  }
+
   /**
    * Model kind.
    *
@@ -41,7 +52,9 @@ abstract class GenerativeModel<T> {
    * @type {Model}
    */
   protected get model() {
-    return getConfig('generativeModel', 'gpt-5');
+    const model = getConfig('generativeModel', 'gpt-5');
+    if (model === 'custom') { return getConfig('generativeModelCustom', 'gpt-5'); }
+    return model;
   }
 
   /**
@@ -123,7 +136,7 @@ class GenerativeOpenAI extends GenerativeModel<OpenAI> {
    * @override
    */
   protected override init(): OpenAI {
-    return new OpenAI({apiKey: this.apiKey});
+    return new OpenAI({baseURL: this.baseURL, apiKey: this.apiKey});
   }
 
   /**
@@ -432,7 +445,9 @@ class GenerativeAPI {
    * @type {Model}
    */
   protected get model() {
-    return getConfig('generativeModel', 'gpt-5');
+    const model = getConfig('generativeModel', 'gpt-5');
+    if (model === 'custom') { return getConfig('generativeModelCustom', 'gpt-5'); }
+    return model;
   }
 
   /**

src/extension.ts

@@ -66,7 +66,7 @@ type NodeType = 'function' | 'class' | 'interface' | 'type' | 'enum' | 'property
  *
  * @typedef {Model}
  */
-type Model = 'gpt-5' | 'gpt-5-mini' | 'gpt-5-nano' | 'gpt-4.1' | 'gpt-4.1-mini' | 'gpt-4.1-nano' | 'gpt-4o' | 'gpt-4o-mini' | 'gpt-o3' | 'gpt-o3-mini';
+type Model = string;
 
 /**
  * JSDoc custom tag.
@@ -198,6 +198,12 @@ interface Configuration {
    * @type {number}
    */
   tagDescriptionColumnStart: number;
+  /**
+   * Generative AI Endpoint.
+   *
+   * @type {string}
+   */
+  generativeEndpoint: string;
   /**
    * Generative AI API key.
    *
@@ -210,6 +216,12 @@ interface Configuration {
    * @type {Model}
    */
   generativeModel: Model;
+  /**
+   * Generative AI model.
+   *
+   * @type {Model}
+   */
+  generativeModelCustom: Model;
   /**
    * Language of the generated descriptions.
    *