  We report on progress in the determination of the unpolarised nucleon PDFs
within the ABM global fit framework. The data used in the ABM analysis are
updated including the charm-production and the high-Q2 neutral-current samples
obtained at the HERA collider, as well as the LHC data on the differential
Drell-Yan cross-sections. An updated set of the PDFs with improved experimental
and theoretical accuracy at small x is presented. We find minimal impact of the
t-quark production cross section measured at the Tevatron and the LHC on the
gluon distribution and the value of the strong coupling constant \alpha_s
determined from the ABM fit in the case of the t-quark running-mass definition.
In particular, the value of \alpha_s(M_Z)=0.1133(8) is obtained from the
variant of the ABM12 fit with the Tevatron and CMS t-quark production
cross-section data included and the MSbar value of m_t(m_t)=162 GeV.
