Caris Life Sciences Publishes Study Showing its Multi-Layer AI-Based Tissue of Origin Predictions are Best-in-Class and Identify when Patients have been Misdiagnosed

Caris GPSai™ utilizes deep learning to significantly improve diagnostic accuracy for cancers of unknown primary and misclassified tumors

IRVING, Texas, Aug. 5, 2025 /PRNewswire/ -- Caris Life Sciences® (NASDAQ: CAI), a leading, patient-centric, next-generation AI TechBio company and precision medicine pioneer, recently published a study on the development and validation of Caris' latest version of Caris GPSai™ in AACR's Cancer Research Communications Journal. Caris GPSai is a clinically validated deep learning multi-layer AI that leverages comprehensive whole exome and whole transcriptome sequencing (WES/WTS) to significantly improve diagnostic accuracy for cancers of unknown primary (CUP) and identify patients who have potentially misdiagnosed tumors.

This latest advancement marks a shift from traditional machine learning to a deep learning-based approach, enabling more precise prediction of tumor tissue of origin and the identification of potential misdiagnoses during routine molecular profiling, ultimately supporting more informed treatment decisions and potentially improving patient outcomes.

The enhanced Caris GPSai was trained on WES/WTS data from over 200,000 Caris-profiled cases and classifies tumors into 90 categories. The tool demonstrated 95.0% accuracy in identifying tumor tissue of origin in non-CUP cases and successfully reported a tissue of origin in 84.0% of CUP and 96.3% of non-CUP cases during retrospective (N=21,549) and prospective (N=76,271) validations.

"The latest version of GPSai, which is a part of Caris' comprehensive molecular profiling platform, represents a major advancement in precision oncology," said Matthew Oberley, MD, PhD, Caris SVP and Chief Clinical Officer and Pathologist-in-Chief. "By leveraging deep learning and whole exome and whole transcriptome sequencing, GPSai enhances diagnostic confidence, enabling more accurate identification of primary tumor sites and supporting more personalized treatment decisions, without the need for additional tissue samples."

In clinical use over eight months, GPSai changed the diagnosis in 704 patients, supported by orthogonal evidence such as imaging and molecular markers. These diagnostic shifts impacted treatment eligibility in 86.1% of these cases based on Level 1 clinical evidence, and 53.6% of surveyed physicians reported changing treatment plans as a result, underscoring the potential of GPSai to provide meaningful influence in patient care.

"By enhancing diagnostic accuracy, GPSai empowers physicians to make more informed treatment decisions and identify the tumor type for patients with CUP and those that have been misdiagnosed," said David Spetzler, MS, PhD, MBA, President of Caris. "For example, we had a case where we found a woman diagnosed with triple negative breast cancer, who actually had B-cell Lymphoma; getting the correct diagnosis had a profound effect on her life."

The publication can be viewed in its entirety on the Caris Life Sciences website.

About Caris Life Sciences 
Caris Life Sciences^® (Caris) is a leading, patient-centric, next-generation AI TechBio company and precision medicine pioneer that is actively developing and commercializing innovative solutions to transform healthcare. Through comprehensive molecular profiling (Whole Exome and Whole Transcriptome Sequencing) and the application of advanced AI and machine learning algorithms at scale, Caris has created the large-scale, multimodal clinico-genomic database and computing capability needed to analyze and further unravel the molecular complexity of disease. This convergence of next-generation sequencing, AI and machine learning technologies, and high-performance computing provides a differentiated platform to develop the latest generation of advanced precision medicine diagnostic solutions for early detection, diagnosis, monitoring, therapy selection and drug development. 

Caris was founded with the belief and vision that combining a vast set of consistently generated molecular information with robust data-driven insights could realize the potential of precision medicine for patients. Headquartered in Irving, Texas, Caris has offices in Phoenix, New York, Cambridge (MA), Tokyo, Japan and Basel, Switzerland. Caris or its distributor partners provide services in the U.S. and other international markets. 

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SOURCE Caris Life Sciences