Third attempt (and I assure you, I'm not just reporting back the most silly ones!), Gemini Flash / Extended Reasoning.

Q. "What would happen if the earth's sun went supernova right now?"

A full page of lurid description...

"1. The Instant Obliteration of Life: ~499 SecondsBecause nothing travels faster than light, the electromagnetic radiation (gamma rays, X-rays, and intense light) and the initial flood of neutrinos will cover the average 149.6 million kilometer distance in roughly 499 seconds. When that light arrives, the side of the Earth facing the Sun would be instantly flash-fried.Within seconds, the atmosphere would be stripped away and the oceans would begin boiling instantly.Even the night side wouldn't offer protection: the sudden heating, atmospheric shockwaves, and massive neutrino/gamma radiation passing directly through the planet would kill all surface life virtually instantly. "

2. The Physical Destruction of the Planet: ~530 Seconds
For the actual rocky body of the Earth to be vaporized, it would take the initial flash of thermal energy roughly 30 additional seconds to deposit enough heat into the planet's crust and mantle to convert it completely into gas.

Total time to total vaporization: ~530 seconds (around 8 minutes and 50 seconds).

3. The Physical Blast Wave: ~5,000 to 10,000 Seconds
If the planet somehow managed to survive being vaporized by the sheer heat and light, the physical mass of the exploding star (the supernova ejecta moving at around 5% to 10% the speed of light) would physically slam into Earth's orbit roughly 1.5 to 3 hours (approx. 5,000 to 10,000 seconds) after the initial detonation."

Then, right at the very end of a full page of total nonsense, the actual correct and contradicting answer lies hidden halfway through a sentence - the only thing it should have stated as a reply:

"our Sun doesn't have enough mass to ever go supernova"

Because supernovas only happen to much larger stars or in binary systems.

I am getting similar results when I try it for finance ideas where I happen to know a company well and the company is not 'well studied' in public material the way e.g. Berkshire Hathaway is.

Really, is this the best Google can come up with, after two decades of research in this topic, despite tens of thousands of PhDs working on it?

Despite extreme costs in development and operation, forcing the company to take on massive bond borrowings for the first time?

Yikes.

TRS

PS fun fact: Your body is built from ancient supernovae

commons.wikimedia.org - File:Nucleosynthesis periodic table