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The strong coupling constant $\alpha_s$ and the heavy-quark masses, $m_c$,$m_b$, $m_t$ are extracted simultaneosly with the parton distribution functions(PDFs) in the updated ABM12 fit including recent data from CERN-SPS, HERA,Tevatron, and the LHC. The values of \begin{eqnarray} \nonumber\alpha_s(M_Z)&=&0.1147\pm0.0008~({\rm exp.)},\\ \nonumber m_c(m_c)&=&1.252\pm0.018~({\rm exp.})~{\rm GeV},\\ \nonumber m_b(m_b)&=&3.83\pm0.12~({\rmexp.})~{\rm GeV},\\ \nonumber m_t(m_t)&=&160.9\pm1.1~({\rm exp.})~{\rm GeV}\end{eqnarray} are obtained with the $\overline{MS}$ heavy-quark massdefinition being employed throughout the analysis.

PDFs, $\alpha_s$, and quark masses from global fits