  The results of the most recent measurements of the inclusive
$\mathrm{t\bar{t}}$ cross section performed by the ATLAS and CMS experiments at
the CERN LHC are summarized. These include results obtained in proton-proton
collisions at different centre-of-mass energies, and the first observation of
$\mathrm{t\bar{t}}$ production in proton-lead collisions. A new result at
$\sqrt{s} = 13~\mathrm{TeV}$ by the CMS Collaboration is presented for the
first time at this conference. In this analysis, the total cross section is
determined both for a fixed top quark mass value in the simulation of
$m_{\mathrm{t}}^{\mathrm{MC}} = 172.5~\mathrm{GeV}$, and simultaneously with
$m_{\mathrm{t}}^{\mathrm{MC}}$.
