Della Anissa Putri Widodo, Nono Heryana and Azhari Ali Ridha 2026. Optimizing Deepseek Chat API Costs Based on Log Pattern Analysis using Business Intelligence and CRISP-DM. International Journal of Science and Society. 8, 4 (Oct. 2026), 142-162. DOI:https://doi.org/10.54783/ijsoc.v8i4.1764.