Probably not... likely too powerful. If you want a tough giant-like final boss, maybe use an Ettin (CR4). 

A typical level one character has 8-14 hp, and this cyclops deals an average of 19 damage in one hit, twice per turn.  If you want to use a cyclops as a boss, I would make its greatclub only deal 1d8+4 damage (an average of 8) per hit.  Perhaps give it some more interesting actions, like a grab attack that can pick up a player character.

it is nobody

Quote from MajinSnail59 >>

In one of my campaigns there is a character that has collected, and don't ask, 7 Staffs of the Python.  They obliterated this thing with a little help from an archer.  

 If you are playing at home and this is allowed at your table, knock yourself out...but the Staff of the Python requires attunement, so if you have no other items you want to attune to, you can use 3 of these staves.

So... In mythology, cyclops are actually not allways total idiots, they are very skilled blacksmiths in fact, in certain myths it was the cyclops that created not only the lightning bolts of Zeus, but the helmet of Hades and the trident of Poseidon. So if you use one in a campaign, I think you can add to it's wizdom and intelligence stats. Plus that in certain myths they are invulnerable to fire, so that could also be added if you wish to make a more mythologically fitting. In certain myths cyclops also have the ability to mimic voices incredibly well.

Quote from ZackathaarTheStealthy >>

I am making a Homebrew campaign for some friends. Is this an ok monster for some level one characters as a boss?

 Absolutely not. Cyclops has way too many hitpoints for a level 1 boss, and its attacks do too much damage. I would recommend something at most CR3-4 as a boss, but don't choose something ridiculous. 

Quote from ArtemisCaresTooMuch >>

Wait... I heard Nobody can trick a cyclops, why is its Wisdom just a 6?

 Nice...

Only if you plan on getting your chars to talk their way out of any situation😅 they would die hard in combat

Bravo pour cette claire description. DE:LEFANDEDND

Quote from Streamshock23 >>

Probably not... likely too powerful. If you want a tough giant-like final boss, maybe use an Ettin (CR4). 

Those are cyclopes born by Gaia, DnD cyclopes are based off of Polyphemus from the Odyssey, a cyclops born by Poseidon, which is entirely separate from the skilled Gaia-born cyclopes.

Quote from DragonJordan >>

it is nobody

Actually its Οὖτις 

Quote from ShaydyCharacter >>

Quote from OrbitalBliss >>

Poor Depth Perception. The cyclops has disadvantage on any attack roll against a target more than 30 feet away.

Did they even think before they wrote that?

The only Ranged attack the Cyclops has, Rock, has a Range of 30/120. They already have disadvantage on ranges greater than 30ft. Their Poor Depth Perception does nothing.

 Hey, I was just about to say the same thing. But on top of that, you made your comment on my birthday. Anyway, it's like someone was imagining a cyclops using a bow, but that feels a little bit weird, especially since apparently they'd be bad at it. A true giant maybe, but not a cyclops. More sensibly, they should have disadvantage on sight perception beyond 30 ft.

 It was a good catch, and a pointless attribute. However, a monocular individual can still see 20/20. Noticing the distance target and being able to hit it are two different things. However, they probably also have poor peripheral vision, so they could have swapped the poor depth perception out for that, though I’m not sure how to translate that into a game mechanic. 

Most parties at level one are getting steamrolled unless your table is 8 players just wait until there level four.

Only if you have an army of level 1 characters. Party size would need to be in the double digits otherwise they get brutalized, but hey at least the survivors will level up a few times ;)

They should be able to mimic voices like in greek myths 

grrrr

Poor peripheral vision could be represented as whatever it is fighting gains the Pack Tactics feature. It wouldnt be able to properly react in a defensive manner if there was something in front of it and beside it. 

I want there to be a Cyclops race just so I could play Polyphemus.

Quote from ZackathaarTheStealthy >>

I am making a Homebrew campaign for some friends. Is this an ok monster for some level one characters as a boss?

 Not at level 1.