The Doubao Large Model 2.1 Pro has undergone an upgrade to its 0915 version, with a primary emphasis on refining production work environments and minimizing AI-generated hallucinations. This latest iteration enhances its function of tracing evidence to its origin (Note: Here, 'trace to the source' is aptly rendered as 'tracing to the origin' for better contextual fit), facilitating multi-Agent cooperation to tackle intricate tasks and trace evidence, thereby guaranteeing a more reliable execution of extended tasks. Concurrently, there has been a notable enhancement in its multimodal programming prowess, allowing it to comprehend code repositories, diagnose and rectify issues spanning multiple files, generate code from images, and bolster its video comprehension abilities to extract pivotal information across various frames. Moreover, the Token usage for image and video reasoning has been slashed by over 30%, leading to a substantial reduction in costs.