Make gemini-1.5-pro-002 the default Vertex model

GitOrigin-RevId: 00c3cb07365a7b3a5bd755ae580008c12eeac806

README.md

@@ -53,12 +53,11 @@ Then to log in locally run:
 Summarize Seattle’s $15 Minimum Wage Conversation.
 
 ```
-// Set up the tools to use Gemini Pro 1.5 and related authentication info.
+// Set up the tools to use the default Vertex model (Gemini Pro 1.5) and related authentication info.
 const mySensemaker = new Sensemaker({
   defaultModel: new VertexModel(
     "myGoogleCloudProject123,
     "us-central1",
-    "gemini-1.5-pro-002"
   ),
 });
 
@@ -97,7 +96,7 @@ The documentation [here](https://jigsaw-code.github.io/sensemaking-tools) is the
 
 ## Feedback
 
-If you have questions or issues with this library please leave feedback [here](https://docs.google.com/forms/d/e/1FAIpQLSd6kScXaf0d8XR7X9mgHBgG11DJYXV1hEzYLmqpxMcDFJxOhQ/viewform?resourcekey=0-GTVtn872epNsEHtI2ClBEA) and we will reach out to you.
+If you have questions or issues with this library please leave feedback [here](https://docs.google.com/forms/d/e/1FAIpQLSd6kScXaf0d8XR7X9mgHBgG11DJYXV1hEzYLmqpxMcDFJxOhQ/viewform?resourcekey=0-GTVtn872epNsEHtI2ClBEA) and we will reach out to you. Our team is actively evaluating Sensemaking performance and is aiming to share our results on this page in the future. Please note that performance results may vary depending on the model selected.
 
 ## Cloud Vertex Terms of Use
 

src/models/vertex_model.ts

@@ -38,10 +38,10 @@ export class VertexModel extends Model {
    * Create a model object.
    * @param project - the Google Cloud Project ID, not the numberic project name
    * @param location - The Google Cloud Project location
-   * @param modelName - the name of the model to connect with, like "gemini-1.5-pro-002", see the
-   * full list here: https://cloud.google.com/model-garden?hl=en
+   * @param modelName - the name of the model from Vertex AI's Model Garden to connect with, see
+   * the full list here: https://cloud.google.com/model-garden
    */
-  constructor(project: string, location: string, modelName: string) {
+  constructor(project: string, location: string, modelName: string = "gemini-1.5-pro-002") {
     super();
     this.vertexAI = new VertexAI({
       project: project,