Off the top of my head:
cyrax matchups that might be even but i dunno prolly cyrax wins: skarlet, kung lao, sindel (ok a stretch), shang tsung (only if he did more damage, i have a lot of experience with this one)
cyrax matchups that in my opinion are very possibly even: liu kang johnny cage(really believe in this one) kenshi (could be 6-4 kenshi) raiden
cyrax matchups that are very possibly potential losses: jax freddy smoke sonya kitana sektor(debated calling this a definite loss)
cyrax matchups in my opinion that are sure losses: kabal
kabal even matchups: ehhh maybe kung rao and kitana?? nehhhh 6-4 kabal
kenshi bad matchups: kung lao and kabal
kenshi potential even matchups: cyrax skarlet freddy(okay this is a toughy) (this blind asshole beats reptile and smoke you [ban incoming])
kenshi wrecks all else
freddy bad matchups: smoke kabal kung lao
freddy matchups i feel are even or possibly even wins: skarlet kenshi(no way kenshi wins) mileena raiden cyrax (imo this could be in freds favor)
freddy wrecks all else
cyrax preys on mistakes however so if we balanced the risk/reward ratios of the read scenarios matchups might be different
but at the highest level this beast of a character could be anywhere between 2 and 6, but not better than a character who literally beats everyone else if played to perfection.