This study is to evaluate the safety and tolerability of JAB-2485 monotherapy in adult participants with advanced solid tumors.
Inclusion Criteria: * Must have Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 * Must be able to provide an archived tumor sample * Must have histologically or cytologically confirmed metastatic or locally advanced solid tumor * Dose Expansion phase cohorts must meet specific expression or gene mutation where indicated * Must be refractory to or become intolerant of existing therapy(ies) known to provide clinical benefit for their condition * Must have at least 1 measurable lesion per RECIST v1.1 * Must have adequate organ functions * Must be able to swallow and retain orally administered medication Exclusion Criteria: * Has central nervous system (CNS) metastases or carcinomatous meningitis, except if CNS metastases treated and no evidence of radiographic progression or hemorrhage for at least 28 days * Active infection requiring systemic treatment within 7 days * Active hepatitis B virus (HBV), hepatitis C virus (HCV), or HIV * Any severe and/or uncontrolled medical conditions * left ventricular ejection fraction (LVEF) ≤50% assessed by echocardiogram (ECHO) or multigated acquisition scan (MUGA) * QT interval using Fridericia's formula (QTcF) interval \>470 msec * Experiencing unresolved CTCAE 5.0 Grade \>1 toxicities * Clinically significant eye disorders