Microsoft and Uber are grappling with significant AI budget overruns as spending on Claude Code surpasses initial forecasts. Microsoft has begun canceling most internal Claude Code licenses, particularly within its Experiences and Devices division, with access ending by June 30. The decision follows unsustainable costs linked to token-based billing, despite reported productivity gains of 80% from AI tools. Uber's situation is more acute, with the company exhausting its entire 2026 AI budget by April. Chief Technology Officer Praveen Neppalli Naga revealed that the deployment of Claude Code to 5,000 engineers led to monthly costs of $500 to $2,000 per engineer, with AI tools now responsible for 70% of committed code. This financial strain reflects a broader industry trend, as a Mavvrik survey indicated that 85% of companies miss AI cost forecasts by over 10%, impacting gross margins significantly. The AI cost crisis is prompting companies to implement stricter financial controls and governance measures. As Big Tech's AI capital expenditure reached $650 billion in Q1 2026, the number of FinOps teams managing AI spend has doubled, highlighting the urgent need for cost management strategies.