Backstory: Tony Stark was worried that the Avengers aren't enough to protect the world from the threat of aliens so he came up with an idea to make an AI from the Mind Stone named Ultron. He believed Ultron would be a suit of armor around the world, so he and Bruce worked on Ultron until he's ready. He and Jarvis  talked to each other and Jarvis told Ultron that he is tasked in bringing peace to the world and in his mind the one path to piece is the elimination of all life. In one timeline he failed, in another he succeeded and then failed.

Background:

-Name: Ultron

-Purpose: Bring in Peace of Our Time 

-Killed by: Vision(Main Timeline), Arnim Zola

-The Most Expressive Robot in a movie

-Became the Primary AI of the Illuminati of Earth-838

-Creators: Tony Stark, Bruce Banner, the Mind Stone

-Voiced by two people

-The Big Bad of Phase 2 and What If Season 1

-Killed Quicksilver

Equipment and Weapons(Prime and Vibranium Bodies):

-Robotic Physique

-Vibranium Armor

-Energy Blasts

-Heat Generation

-Rocket Powered Flight

-Computer Interface

-Ultron Sentries

>Plasma Cannons

>Rocket Powered Flight

>Hive Mind intelligence

Equipment and Weapons(Vision's Body):

-Sythezoid Physique

-Flight

-Vibranium Exoskeleton

-Intangible Body

-Double Headed Spear

-Ultron Sentries

>Can make drones out of his Vibranium Body 

-Infinity Stones

>Mind Stone

>Space Stone

>Reality Stone

>Power Stone

>Time Stone

>Soul Stone

-Spherical Space Ship

>Carries all of his Ultron Sentries

Feats(Strength and Durability):

-Overpowered Captain America

-Killed off the Avengers

-Killed Captain Marvel

-Destroyed Ego

-Killed the Eternals offscreen

-Tanked hits from Hulk

-Fought and overpowered The Watcher

-Tanked hits from the Guardians of the Multiverse

-Killed Zombie Scarlet Witch

-Grew Large enough to bite into a galaxy so hard that it exploded

-Created a galaxy sized explosion

-Made a Messy Universe Soup

-Wiped out his Universe in a small amount of time

-Scales to Konschu, Hela, Strange Supreme, the Celestials, and Arishem the Judge

Feats(Speed):

-Ultron Sentries flew from space to Ego

-Increased his size to grow larger than a galaxy

-Kept up with Iron Man and Captain America

-His energy blasts are faster than MCU Quicksilver's Speed

-Can scale to Ikaris and Makkari

-Scales to Koncshu, Strange Supreme, Celestials, and Arishem

Stats(Strength and Durability):

-Vibranium Durability

>The amount of force required for Hulk to leave a dent on the Vibranium wall should be a multiplier compared to Thor's attempt to shatter Captain America's shield.

>First let's go over Thor's maximum potential before he leveled up in Thor Ragnarok which is destroying Sokovia

>According to this: https://vsbattles.fandom.com/wiki/User_blog:KLOL506/Blowing_Up_Sokovia#Pixel-scaled_Image

>Thor's maximum output was 163 Gigatons

>In the Retreat, Hulk was able to punch the vibranium wall hard enough to leave a dent in it

>According to Comic books vs the world:

https://youtu.be/PfApMgKf6Tk

>Hulk was able to punch the Vibranium wall with 2592 tsf, using that as a multiplier. Ultron's Vibranium body both in Age of Ultron and What if is 414720 Gigatons or 415 Teratons which is Large Country Level. But Since in Vision's Body, he was able to shatter Captain America's shield which is 3730 tsf which is 607990 gigatons or 608 Teratons which is Large Country Level

-Using Sokovia to destroy all life

>According to the documents of the Sokovia Accords, Ultron with prep time to use Sokovia to destroy all life on Earth and cause an Ice Age would be Multi-Continent Level

-Kiling Thanos

>In this scene

https://youtu.be/ghOkJrLl1CE

>The amount of force from the Snap he performed was 5.836 gigatons or 6 Gigatons since the number keeps rising. Since he snapped twice it should be double the amount of force. If we can scale the amount of power of one Infinity Stone, for example the Power Stone wiped out a planet

>Accordding to this: https://vsbattles.fandom.com/wiki/User_blog:KLOL506/MCU:_Worrisome_World_Wipe_(Re-do)

>The Power Stone has an output of 17 Yottatons.

>Since it's been stated multiple times that the Infinity Stones have equal power.

> 17 x 6 x 2 = 204 Yottatons (Large Planet Level)

-Scaling to the Eternals

>Ikaris was strong enough to 2 shot the Domo which can survive close proximity to the sun which is Multi-Continent level which is between 4.435 Petatons to 30 Exatons, since all of them can take hits from Ikaris that would be a 10x multiplier, which is 300 Exatons(Moon Level)

-Scaling to Konschu

>According to this: https://vsbattles.fandom.com/wiki/User_blog:Aguywhodoesthings/Moon_Knight:_Khonshu_moves_the_moon

>Konschu was strong enough to have an output of 2 Yottatons which is Planet Level

>His power combined with his Avatar was able to reshape the stars to make them look like the stars a thousand years ago which is Multi-Solar System Level

-Destroying Ego

According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Even_More_What_If_Feats#Ultron's_Drones_attack_Ego

>Destroying Ego requires 48.11 Yottatons of force which is Large Planet Level

-Blowing up a Zombie Waifu

>According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Even_More_What_If_Feats#Ultron's_Drones_attack_Ego

>The force required to blow up that planet is 334.13 Ninatons(Dwarf Star Level)

-Killing Captain Marvel

>According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Ultron_destroys_7_planets

>Requires 51 Tenatons which is Small Star Level

-Scaling to Celestials

https://youtu.be/bV5YuZnRXjA

>The average Celestial can make a star which makes one of them Star Level

>Arishem was responsible for the Big Bang, which is Universe Level

-Taking a bite out of a galaxy

>According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/What_If_Episode_8_Feats#Ultron_grows_larger_than_a_galaxy

>It took 93 tenagigafoe which is Multi-Galaxy 

-Various Universe Level feats

>Fighting the Watcher

>Fighting Strange Supreme

>Made a Messy Soup Universe

>Wiped out his universe in a small time frame

-Ultron Destroys a galaxy with a thought

>According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Even_More_What_If_Feats#Ultron_tries_to_bust_a_galaxy:_AP_Edition

>Ultron has an output of 12 Zettafoe

-Ultron Sentry Stats

>The Ultron Sentries are strong enough to break concrete, which is Wall level

Final Verdict: Island to Large Planet Level(Vibranium Body and Vision's body), Multi-Continent Level with Prep time, Universe+to Low Multiverse Level(With the Infinity Stones)

Stats(Speed):

-Scaling to Quicksilver

>According to this:

>Quicksilver has the potential to go to the Speed of Light, since we seen most of the characters of the MCU like Captain Marvel going to FTL speeds so I'm gonna say that Quicksilver is the Speed of Light and I'm gonna say that Ultron is 10x faster than Quicksilver, that seems to be fair

-Ultron Sentry Speed

>According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Even_More_What_If_Feats#Ultron's_Drones_attack_Ego

>The Sentries were fast enough to go to 4103901.1 m/s or 9180165.30959 MPH or Mach 12060, which is Sub-Relativistic

-Faster than Captain Marvel who can move at 1,461,000x the speed of light (MFTL+)

-Creating a galaxy sized explosion

According to this: https://vsbattles.fandom.com/wiki/User_blog:AbaddonTheDisappointment/Ultron_(tries_to)_bust_a_galaxy

The blast has a speed of 1405820510000000000000 MPH or 2096362200000x the Speed of Light

-Makkari and Ikaris scaling

>Ikaris was fast enough to go to the sun in a short amount of time, which is 18 seconds  that's 28x the speed of light

>As for Makkari, she did this:

https://youtu.be/WMa-qWSdUfM

>I slowed down the video and Makkari did 13 laps around the planet Earth in 6 seconds which is 61,756,500 MPH

>Combining both results would still be 28x the speed of light, with the multiplier that would be 282x the Speed of Light

-Another MFTL speed is Konschu moving the stars at an incredible speed

-He can change his size fast enough to be the size of a galaxy, which is 38,592,698,000,000x the Speed of light

Weaknesses:

-Can't make his army without all of the stones

-Can be blocked out of the internet from other AIs such as Jarvis and Vision and is vulnerable to death in his last body

-He's not invincible

-Cannot combat analog AIs like Arnim Zola

-His inner systems can be destroyed by extreme heat

-His Infinity Stones can be countered and or destroyed by the Scarlet Witch, Infinity Crusher, and Stormbreaker

Possible Opponents:

-Ultron Sigma

-Cat Blanc

-Kratos

-Sun Wukong(Original Myth)

-Bayondetta

-Dante

-Albedo

-Megaman.Exe