  We use the non-Gaussian fixed points (NGFPs) appearing in the renormalization
group flow of gravity and gravity-matter systems to construct models of
NGFP-driven inflation via a renormalization group improvement scheme. The
cosmological predictions of these models depend sensitively on the
characteristic properties of the NGFPs, including their position and stability
coefficients, which in turn are determined by the field content of the
underlying matter sector. We demonstrate that the NGFPs appearing in
gravity-matter systems where the matter content is close to the one of the
standard model of particle physics are the ones compatible with cosmological
data. Somewhat counterintuitively, the negative fixed point value of the
dimensionless cosmological constant is essential for these findings.
