From new to large-field inflation

We briefly summarize and update a class of inflationary models from the early eighties based on a quartic (Coleman-Weinberg) potential for a gauge singlet scalar (inflaton) field. For vacuum energy scales comparable to the grand unification scale, the scalar spectral index n(s) similar or equal to 0.94-0.97, in very good agreement with the WMAP three year results. The tensor to scalar ratio r less than or similar to 0.14 while a equivalent to dn(s)/d Ink is similar or equal to -10(-3). For vacuum energy scales >= 10(16) GeV, the inflationary scenario switches from 'new' to 'large-field' (V proportional to phi(2)) inflation. An SO(10) version naturally explains the observed baryon asymmetry via non-thermal leptogenesis.