nevermind i found the solution, a bit simple…
<?php
/**
* Template Name: Test
*/
get_header(); ?>
<section id="content" class="clearfix">
<?php if ( have_posts() ) : ?>
<div id="post-listing" class="clearfix">
<?php while ( have_posts() ) : the_post(); ?>
<?php endwhile; ?>
<?php endif; wp_reset_postdata(); ?>
<?php $args = array(
'post_type' => array('model', 'stage' ),
);
query_posts( $args );?>
<?php while (have_posts()) : the_post(); ?>
<article id="post-<?php the_ID(); ?>" class="post columns four item">
[content]
</article>
<?php endwhile; ?>
</section>
<?php get_footer(); ?>
