I don't know. Claude Opus 5.5 still makes rudimentary mistakes all the time as I use it.

More than that, it cannot go beyond a certain level. Like a dog that can only do dog-level actions. I've lost count of the number of times I step back, take a critical look at what it has been hacking away at for hours, which would seem OK, but can be replaced by a much more effective architecture.

For the foreseeable future, a human is still very much needed in the driver's seat.

Individual agents do suffer from making dumb assumptions and tunnel vision. But that can be improved significantly by using multiple agents, with some assigned to just review and critique the workers' outputs. Personally, I've not found this useful because there's just so many layers between you and the work. Maintaining intent is much harder.