<ul class="small-block-grid-2 medium-block-grid-3 large-block-grid-4">

<?php
		$args = array( 'post_type' => 'my-cpt', 'order' => 'ASC', 'orderby' => 'date' );
		$the_query = new WP_Query( $args );
		if ( $the_query->have_posts() ) :
		while ( $the_query->have_posts() ) : $the_query->the_post();?>

<li>
<?php $thumb = wp_get_attachment_image_src( get_post_thumbnail_id($post->ID), 'post-thumbnail' );$url = $thumb['0'];?>
<a href="<?php the_permalink();?>"><img src="<?php echo esc_url($url); ?>" alt="" /></a>
<h3><a href="<?php the_permalink();?>"><?php the_title();?></a></h3>
</li>

		<?php endwhile; endif; wp_reset_postdata();?>
</ul>