Worked on the menloresearch/litellm repository to address a critical issue in GPT-4o billing accuracy and cost management. Focused on resolving a pricing discrepancy by aligning the GPT-4o model’s costs with the reference version gpt-4o-2024-08-06, ensuring that API usage is billed correctly and transparently. Utilized Python to implement and validate the fix, which improved cost visibility and strengthened revenue integrity for API integrations. This targeted bug fix reduced the risk of revenue leakage and enhanced customer invoicing reliability, demonstrating a methodical approach to maintaining accurate cost tracking and supporting robust cost management practices within the codebase.