Hello aditya-vishwakarma, the short answer to your question is your usage of Anthropic models will trigger a direct billing on your credit card/invoice and cannot be paid with through your Sponsorship credits. Do not get confused with MACC which is applicable mainly to EA contracts with Azure spend commitments and these commitments can be consumed via purchased of Co-sell incentivized offers on the marketplace. So, with reference to your question, both the sections "Marketplace" and "MACC" are true and correct but for your specific purchase, only the section "Marketplace" is relevant and hence you'll be charged for the usage and this cannot be offset via the Azure credits.
Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.