  Recently, experimental collaborations have reported $\mathcal{O}(10)$ upper
limits on the signal strength of four-top production at the LHC. Surprisingly,
we find that the constraining power of four-top production on the $qqtt$ type
of operators is already competitive with the measurements of top-pair
production, even though the precision level of the latter is more than two
orders of magnitude better. This is explained by the enhanced sensitivity of
the four-top cross section to $qqtt$ operators, due to multiple insertion of
operators in the squared amplitude, and to the large threshold energy of
four-top production. We point out that even though the dominant contribution
beyond the standard model comes from the $\mathcal{O}(C^4/\Lambda^8)$ terms,
the effective field theory expansion remains valid for a wide range of
underlying theories. Considering the possible improvements of this measurement
with higher integrated luminosity, we believe that this process will become
even more crucial for probing and testing the standard model deviations in the
top-quark sector, and will eventually provide valuable information about the
top-quark properties, leading to significant improvements in precision top
physics.
