[Nimrod]

Nimrod is the "Ultimate" Sentinel, more formidable than the Omega class "Hunter/Killer" Sentinels. He is level 100 tons in the strength dept, has a vast array of offensive weapons & various defensive weapons & can develop countermeasures to any mutant he encounters. I don't know how he would do against a non mutant being such as Thor or the Hulk, though I would imagine that he would give both a helluva fight & possibly come out on top.

Description of Nimrod:

"Nimrod is the ultimate Sentinel robot. It is the epitome of Sentinel technology and as such bears the latest artificial intelligence and weapon systems of the 21st century.
It is able to manipulate high intensity energy fields. This gives it the abilities to:
Move objects around.
Emit ultra powerful energy blasts.
Project force fields.
Disintegrate matter.
And even teleport itself.

Nimrod possesses a very advanced artificial intelligence. It is capable of critical combat tactics and evaluation, although it is not a very fast thinker. A multitude of sensors including a futuristic Cerebro, telescopic eyes and a powerful radio transmitter and receiver makes it effective at tracking down its prey.
Its robotic body construction is the toughest possible. Powerful engines grants it superhuman strength and endurance. It can also change its appearance to resemble that of any human, something that comes in handy living among them.
Lastly it is equipped with a powerful learning program. It enables him to defeat any opponent after combat analysis. It is even capable of temporarily removing any psionic powers the targets may possess.
As a mutant hunter it, of course, is programmed with all available information about any dead or living mutant known. No sense in trying to get away… you won’t be able to.