Option Price Calculator will create variants when products are added to cart. This is a Shopify requirement.
If you do not want these new variants to appear in your Shopify default options, you can do the following:
Open your main-product.liquid or other product liquid page that renders your product variants or variants picker and look for code or similar code:
<variant-radios class="no-js-hidden" data-section="{{ section.id }}" data-url="{{ product.url }}" {{ block.shopify_attributes }}>
{%- for option in product.options_with_values -%}
<fieldset class="js product-form__input">
<legend class="form__label">{{ option.name }}</legend>
{%- for value in option.values -%}
<input type="radio" id="{{ section.id }}-{{ option.position }}-{{ forloop.index0 }}"
name="{{ option.name }}"
value="{{ value | escape }}"
form="{{ product_form_id }}"
{% if option.selected_value == value %}checked{% endif %}
>
<label for="{{ section.id }}-{{ option.position }}-{{ forloop.index0 }}">
{{ value }}
</label>
{%- endfor -%}
</fieldset>
{%- endfor -%}
<script type="application/json">
{{ product.variants | json }}
</script>
</variant-radios>
You will want to add the following to the code above:
{%- unless value contains “opc-” -%}
{%- endunless -%}
The new block would look like the following:
<variant-radios class="no-js-hidden" data-section="{{ section.id }}" data-url="{{ product.url }}" {{ block.shopify_attributes }}>
{%- for option in product.options_with_values -%}
<fieldset class="js product-form__input">
<legend class="form__label">{{ option.name }}</legend>
{%- for value in option.values -%}
{%- unless value contains "opc-" -%}
<input type="radio" id="{{ section.id }}-{{ option.position }}-{{ forloop.index0 }}"
name="{{ option.name }}"
value="{{ value | escape }}"
form="{{ product_form_id }}"
{% if option.selected_value == value %}checked{% endif %}
>
<label for="{{ section.id }}-{{ option.position }}-{{ forloop.index0 }}">
{{ value }}
</label>
{%- endunless -%}
{%- endfor -%}
</fieldset>
{%- endfor -%}
<script type="application/json">
{{ product.variants | json }}
</script>
</variant-radios>