The production of pion, kaon and proton was measured in Pb–Pb collisions at nucleus– 18 nucleus center-of-mass energy √sNN = 2.76 TeV by the ALICE experiment at Large 19 Hadron Collider (LHC). The particle ratios of these species compared to the RHIC mea20 surements are confronted to the hadron resonance gas (HRG) model and to simulations 21 based on the event generators PYTHIA 6.4.21 and HIJING 1.36. It is found that the 22 homogeneous particle–antiparticle ratios (same species) are fully reproducible by means 23 of HRG and partly by PYTHIA 6.4.21 and HIJING 1.36. The mixed kaon–pion and 24 proton–pion ratios measured at RHIC and LHC energies seem to be reproducible by the 25 HRG model. On the other hand, the strange abundances are underestimated in both 26 event generators. This might be originated to strangeness suppression in the event gener27 ators and/or possible strangeness enhancement in the experimental data. It is apparent 28 that the values of kaon–pion ratios are not sensitive to the huge increase of √sNN from 29 200 (RHIC) to 2760 GeV (LHC). We conclude that the ratios of produced particle at 30 LHC seem not depending on the system size.