Billing confusion between Microsoft and Anthropic over Claude

A Norwegian startup, Vegalabs AS, has reported a significant issue with its billing for the use of the AI model Claude in Microsoft Foundry. Despite having $25,060 in Azure credits obtained through the Microsoft for Startups program, the company was hit with an unexpected charge of $17,600, leading to confusion and frustration.

The problem lies in Microsoft’s sponsorship rules, which explicitly exclude the use of Anthropic models purchased through the Azure Marketplace. Vegalabs mistakenly assumed that its Azure credits would cover the costs associated with using Claude, which resulted in surprise when Microsoft attempted to charge $16,500 directly to its credit card.

## Why it matters This incident underscores the importance of transparency in cloud service billing policies. For entrepreneurs and startups, clarity on how credits are applied and what exceptions exist is crucial for financial planning and cost management. Confusion like this can impact trust in cloud service platforms.

## What we know Vegalabs has been monitoring the Microsoft sponsorship portal, which continued to show available credits while Marketplace charges kept accumulating. The situation has left Vegalabs feeling caught between Microsoft and Anthropic, with both companies directing them to each other for resolution.

## What remains unclear It has not yet been confirmed whether there will be any adjustments or solutions from Microsoft or Anthropic to prevent similar situations in the future. The companies have not provided further details on how these charges will be managed and if any adjustments to sponsorship policies will be considered.