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GPT-5

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431–440 of 1001 posts

Re: GPT-5

#432
That SWE-bench chart with the mismatched bars (52.8% somehow appearing larger than 69.1%) was emblematic of the entire presentation - rushed and underwhelming. It's the kind of error that would get flagged in any internal review, yet here it is in a billion-dollar product launch. Combined with the Bernoulli effect demo confidently explaining how airplane wings work incorrectly (the equal transit time fallacy that NASA explicitly debunks), it doesn't inspire confidence in either the model's capabilities or OpenAI's quality control.

The actual benchmark improvements are marginal at best - we're talking single-digit percentage gains over o3 on most metrics, which hardly justifies a major version bump. What we're seeing looks more like the plateau of an S-curve than a breakthrough. The pricing is competitive ($1.25/1M input tokens vs Claude's $15), but that's about optimization and economics, not the fundamental leap forward that "GPT-5" implies. Even their "unified system" turns out to be multiple models with a router, essentially admitting that the end-to-end training approach has hit diminishing returns.

The irony is that while OpenAI maintains their secretive culture (remember when they claimed o1 used tree search instead of RL?), their competitors are catching up or surpassing them. Claude has been consistently better for coding tasks, Gemini 2.5 Pro has more recent training data, and everyone seems to be converging on similar performance levels. This launch feels less like a victory lap and more like OpenAI trying to maintain relevance while the rest of the field has caught up. Looking forward to seeing what Gemini 3.0 brings to the table.

Re: GPT-5

#433

Wait, isn't the Bernoulli effect thing they're demoing now wrong? I thought that was a "common misconception" and wings don't really work by the "longer path" that air takes over the top, and that it was more about angle of attack (which is why planes can fly upside down). It seems like it's actually an ideal "trick" question for an LLM actually, since so much content has been written about it incorrectly. I thought…

Their code example underwhelmed too, the first one started out with 2/X progress, all of them looked terrible, third didn't have mouse icon.

Re: GPT-5

#434

It is frequently suggested that once one of the AI companies reaches an AGI threshold, they will take off ahead of the rest. It's interesting to note that at least so far, the trend has been the opposite: as time goes on and the models get better, the performance of the different company's gets clustered closer together. Right now GPT-5, Claude Opus, Grok 4, Gemini 2.5 Pro all seem quite good across the board (ie the…

I think it's very fortunate, because I used to be an AI doomer. I still kinda am, but at least I'm now about 70% convinced that the current technological paradigm is not going to lead us to a short-term AI apocalypse.

The fortunate thing is that we managed to invent an AI that is good at _copying us_ instead of being a truly maveric agent, which kinda limits it to the "average human" output.

However, I still think that all the doomer arguments are valid, in principle. We very well may be doomed in our lifetimes, so we should take the threat very seriously.

Re: GPT-5

#435
post #281

> 400,000 context window > 128,000 max output tokens > Input $1.25 > Output $10.00 Source: https://platform.openai.com/docs/models/gpt-5 If this performs well in independent needle-in-haystack and adherence evaluations, this pricing with this context window alone would make GPT-5 extremely competitive with Gemini 2.5 Pro and Claude Opus 4.1, even if the output isn't a significant improvement over o3. If the output qu…

You also have to count the cost of having to verify your identity to use the API

Re: GPT-5

#436

Wait, isn't the Bernoulli effect thing they're demoing now wrong? I thought that was a "common misconception" and wings don't really work by the "longer path" that air takes over the top, and that it was more about angle of attack (which is why planes can fly upside down). It seems like it's actually an ideal "trick" question for an LLM actually, since so much content has been written about it incorrectly. I thought…

The last part of GPT's answer does say: "Bernoulli's effect works alongside Newton's Third Law - the wing pushes air downward [...] - so the lift isn't only Bernoulli..."

According to this answer on physics stackexchange, Bernoulli accounts for 20% of the lift, so GPT's answer seems about right: https://physics.stackexchange.com/a/77977

I hope any future AI overlords see my charity

Re: GPT-5

#437
post #348

I had preview access for a couple of weeks. I've written up my initial notes so far, focusing on core model characteristics, pricing (extremely competitive) and lessons from the model card (aka as little hype as possible): https://simonwillison.net/2025/Aug/7/gpt-5/

Out of interest, how much does the model change (if at all) over those 2 weeks? Does OpenAI guarantee that if you do testing from date X, that is the model (and accompaniments) that will actually be released?

I know these companies do "shadow" updates continuously anyway so maybe it is meaningless but would be super interesting to know, nonetheless!

Re: GPT-5

#438

These presenters all give off such a “sterile” vibe

interesting how they put this effort to making us feel physiologically well with everyone wearing blue shirts, open body language, etc. just to give off sterile robotic vibes. also noticed a dude reading off his hand at 45 minutes in, would think they brought in a few teleprompters.

Re: GPT-5

#439

It is frequently suggested that once one of the AI companies reaches an AGI threshold, they will take off ahead of the rest. It's interesting to note that at least so far, the trend has been the opposite: as time goes on and the models get better, the performance of the different company's gets clustered closer together. Right now GPT-5, Claude Opus, Grok 4, Gemini 2.5 Pro all seem quite good across the board (ie the…

Maybe because they haven't created an engine for AGI, but a really really impressive bullshit generator.

Re: GPT-5

#440

It is frequently suggested that once one of the AI companies reaches an AGI threshold, they will take off ahead of the rest. It's interesting to note that at least so far, the trend has been the opposite: as time goes on and the models get better, the performance of the different company's gets clustered closer together. Right now GPT-5, Claude Opus, Grok 4, Gemini 2.5 Pro all seem quite good across the board (ie the…

I would argue that this is because we are reaching the practical limits of this technology and AGI isn't nearly as close as people thought.
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