% !TEX TS-program = lualatex

\documentclass[a4paper]{article}

% defaults to grade "C" (19)
\usepackage{cmgraded}

\usepackage{kantlipsum}
\pagestyle{empty}

\begin{document}

\section*{\textsf{Computer Modern Graded – Basic Usage Example}}

See \LaTeX\ source\,…

\subsection*{\textsf{Serif}}

\kant[1]

\subsection*{\textsf{Sans}}

\textsf{\kant[2]}

\subsection*{\textsf{Typewriter}}

\texttt{\footnotesize%
Usenet is (or rather was) like a gigantic theater play, staged by millions of\newline
actors without any script. Trying to extract just my lines from that complex\newline
and scintillating web of possibilities would maybe destroy a lot of that, and\newline
even then I would have to leave out a *lot*, so that the best possible result\newline
would be something that would not differ [...]?}

\subsection*{\textsf{Math}}

\begin{equation}
  F = \frac{1}{4\pi\epsilon_0} (\frac{Q}{R})^2 = \mathrm{0.5~N}. 
\end{equation}

\end{document}