Inclusive jet spectra from
p
p
and PbPb collisions at a nucleon-nucleon center-of-mass energy of
2.76
TeV
, collected with the CMS detector at the CERN Large Hadron Collider, are presented. Jets are reconstructed with three different distance parameters (
R
=
0.2
, 0.3, and 0.4) for transverse momentum (
p
T
) greater than
70
GeV
/
c
and pseudorapidity
|
η
|
<
2
. Next-to-leading-order quantum chromodynamic calculations with nonperturbative corrections are found to overpredict jet production cross sections in
p
p
for small distance parameters. The jet nuclear modification factors for PbPb compared to
p
p
collisions, show a steady decrease from peripheral to central events, along with a weak dependence on the jet
p
T
. They are found to be independent of the distance parameter in the measured kinematic range.