  Gamma-ray burst sources appear to fulfill all the conditions for being
efficient cosmic ray accelerators, and being extremely compact, are also
expected to produce multi-GeV to PeV neutrinos. I review the basic model
predictions for the expected neutrino fluxes in classical GRBs as well as in
low luminosity and choked bursts, discussing the recent IceCube observational
constraints and implications from the observed diffuse neutrino flux.
