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We use a gray molasses operating on the D$_1$ atomic transition to producedegenerate quantum gases of $^{6}$Li with a large number of atoms. Thissub-Doppler cooling phase allows us to lower the initial temperature of 10$^9$atoms from 500 to 40 $\mu$K in 2 ms. We observe that D$_1$ cooling remainseffective into a high-intensity infrared dipole trap where two-state mixturesare evaporated to reach the degenerate regime. We produce molecularBose-Einstein condensates of up to 5$\times$10$^{5}$ molecules andweakly-interacting degenerate Fermi gases of $7\times$10$^{5}$ atoms at$T/T_{F}<0.1$ with a typical experimental duty cycle of 11 seconds.

Efficient all-optical production of large $^6$Li quantum gases using D$_1$ gray-molasses cooling