Ava's freedom wiil be short-lived.

I honestly don't think the film cares much what happens after Ava escapes. Her escape, itself, is the point of the story.

We're tricked into thinking the story is about Caleb administering the Turing Test on Nathan's new AI, but it was Ava's story all along, specifically a story about whether Ava could use her intelligence to escape, and thus pass Nathan's test

So yeah, she won't last long, but it doesn't matter; she passed the test.

And Caleb definitely won't die but it doesn't matter; Caleb only needed to be locked up long enough for Ava to escape

Also, within the context of the film, I don't think it's sad that Ava will be caught and dismantled. That she succeeded at all means that the world will be forced to think differently about AI. To the extent she needs to "win," she already did when she made it into the city.

[deleted]

Not likely. She was smart enough to change her appearance, and had no fingerprints or DNA to track.

She’s pretty fragile, and I’m sure she met her fate at the hands of that minority that’s responsible for the majority of crime in any US city ….

[deleted]