Version 7.8.0 (Jun 2026)

Center for Applied Scientific Computing, Lawrence Livermore National Laboratory

SUNDIALS is a family of software packages providing robust and efficient time integrators and nonlinear solvers that can easily be incorporated into existing simulation codes. The library is primarily written in C with interfaces to C++, Fortran, and Python (beta version) and provides support for serial, threaded, distributed, and GPU accelerated computing. The packages are designed to require minimal information from the user, allow users to supply their own data structures underneath the packages, and enable interfacing with user-supplied or third-party algebraic solvers and preconditioners.

The SUNDIALS suite consists of the following packages for ordinary differential equation (ODE) systems, differential-algebraic equation (DAE) systems, and nonlinear algebraic systems:

• ARKODE - for integrating stiff, nonstiff, and multirate ODEs of the form