GPT-5 • Hacker News Board

Re: GPT-5

#291

Post by antoni4040 » Thu, Aug 07, 2025, 5:52 PM UTC

kybernetikos wrote: post #184

ChatGPT5 in this demo: > For an airplane wing (airfoil), the top surface is curved and the bottom is flatter. When the wing moves forward: > * Air over the top has to travel farther in the same amount of time -> it moves faster -> pressure on the top decreases. > * Air underneath moves slower -> pressure underneath is higher > * The presure difference creates an upward force - lift Isn't that explanation of why wings…

Oh my God, they were right, ChatGPT5 really is like talking to a bunch of PhD. You let it write an answer and THEN check the comments on Hacker News. Truly innovative.

Re: GPT-5

#292

Post by lacoolj » Thu, Aug 07, 2025, 5:52 PM UTC

fidotron wrote: post #277

Going by the system card at: https://openai.com/index/gpt-5-system-card/ > GPT‑5 is a unified system . . . OK > . . . with a smart and fast model that answers most questions, a deeper reasoning model for harder problems, and a real-time router that quickly decides which model to use based on conversation type, complexity, tool needs, and explicit intent (for example, if you say “think hard about this” in the prompt).…

Many tiny, specialized models is the way to go, and if that's what they're doing then it's a good thing.

Re: GPT-5

#293

Post by addaon » Thu, Aug 07, 2025, 5:52 PM UTC

kybernetikos wrote: post #184

ChatGPT5 in this demo: > For an airplane wing (airfoil), the top surface is curved and the bottom is flatter. When the wing moves forward: > * Air over the top has to travel farther in the same amount of time -> it moves faster -> pressure on the top decreases. > * Air underneath moves slower -> pressure underneath is higher > * The presure difference creates an upward force - lift Isn't that explanation of why wings…

> Isn't that explanation of why wings work completely wrong?

This is an LLM. "Wrong" is not a concept that applies, as it requires understanding. The explanation is quite /probable/, as evidenced by the fact that they thought to use it as an example…

Re: GPT-5

#294

Post by swimmeric » Thu, Aug 07, 2025, 5:52 PM UTC

Still struggling to find the SWE-benchmark of GPT-5, just found out they are launching it soon, and it’s surprisingly free.

Re: GPT-5

#295

Post by tshaddox » Thu, Aug 07, 2025, 5:52 PM UTC

kybernetikos wrote: post #184

ChatGPT5 in this demo: > For an airplane wing (airfoil), the top surface is curved and the bottom is flatter. When the wing moves forward: > * Air over the top has to travel farther in the same amount of time -> it moves faster -> pressure on the top decreases. > * Air underneath moves slower -> pressure underneath is higher > * The presure difference creates an upward force - lift Isn't that explanation of why wings…

It's an extremely famous example of a widespread misconception. I don't know anything about aeronautical engineering but I'm quite familiar with the "equal transit time fallacy."

Re: GPT-5

#296

Post by mbowcut2 » Thu, Aug 07, 2025, 5:52 PM UTC

mtlynch wrote: post #74

What's going on with their SWE bench graph?[0] GPT-5 non-thinking is labeled 52.8% accuracy, but o3 is shown as a much shorter bar, yet it's labeled 69.1%. And 4o is an identical bar to o3, but it's labeled 30.8%... [0] https://i.postimg.cc/DzkZZLry/y-axis.png

it looks like the 2nd and 3rd bar never got updated from the dummy data placeholders lol.

Re: GPT-5

#297

Post by surround » Thu, Aug 07, 2025, 5:53 PM UTC

GPT-5 knowledge cutoff: Sep 30, 2024 (10 months before release).

Compare that to

Gemini 2.5 Pro knowledge cutoff: Jan 2025 (3 months before release)

Claude Opus 4.1: knowledge cutoff: Mar 2025 (4 months before release)

https://platform.openai.com/docs/models/compare

https://deepmind.google/models/gemini/pro/

https://docs.anthropic.com/en/docs/about-claude/models/overv...

Re: GPT-5

#298

Post by Q6T46nT668w6i3m » Thu, Aug 07, 2025, 5:53 PM UTC

kybernetikos wrote: post #184

ChatGPT5 in this demo: > For an airplane wing (airfoil), the top surface is curved and the bottom is flatter. When the wing moves forward: > * Air over the top has to travel farther in the same amount of time -> it moves faster -> pressure on the top decreases. > * Air underneath moves slower -> pressure underneath is higher > * The presure difference creates an upward force - lift Isn't that explanation of why wings…

[flagged]

Re: GPT-5

#299

Post by samfriedman » Thu, Aug 07, 2025, 5:54 PM UTC

kybernetikos wrote: post #184

ChatGPT5 in this demo: > For an airplane wing (airfoil), the top surface is curved and the bottom is flatter. When the wing moves forward: > * Air over the top has to travel farther in the same amount of time -> it moves faster -> pressure on the top decreases. > * Air underneath moves slower -> pressure underneath is higher > * The presure difference creates an upward force - lift Isn't that explanation of why wings…

The "demo" it made was pretty horrible too. I would have been impressed if it had simulated a NACA 4412 or something.

Re: GPT-5

#300

Post by mrcwinn » Thu, Aug 07, 2025, 5:55 PM UTC

I know HN isn’t the place to go for positive, uplifting commentary or optimism about technology - but I am truly excited for this release and grateful to all the team members who made it possible. What a great time to be alive.