Model without Λ and less radiation. The panels display from top to bottom the expansion history, the CMB temperature spectrum and the matter power spectrum of a model universe without Λ, whose density parameter for radiation is reduced to half its value of the concordance model, while its CDM density parameter has been accordingly increased, such that the total of the energy densities is equal to the critical density. The blue curves depict the results obtained by the public version of CLASS. The magenta curves show the results from the amended version, which uses the ICs of the concordance model. The results of both computations significantly deviate from each other.