Angular has released its final version on 15th of September. Unlike Angular 1 you can use ngModel directive in Angular 2 for two way data binding, but you need write it in a bit different way like [(ngModel)] ( Banana in a box syntax ). Almost all angular2 core directives doesn't support kebab-case now instead you should use camelCase.

Now ngModel directive belongs to FormsModule, that's why you should import the FormsModule from @angular/forms module inside imports metadata option of AppModule(NgModule). Thereafter you can use ngModel directive inside on your page.

app/app.component.ts

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `<h1>My First Angular 2 App</h1>
    <input type="text" [(ngModel)]="myModel"/>
    {{myModel}}
  `
})
export class AppComponent { 
  myModel: any;
}

app/app.module.ts

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { AppComponent }   from './app.component';

@NgModule({
  imports:      [ BrowserModule, FormsModule ], //< added FormsModule here
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})

export class AppModule { }

app/main.ts

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { AppModule } from './app.module';

const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);

Demo Plunkr