Live data from Hacker News

GPT4 is 8 x 220B params = 1.7T params

twitter.com

31–40 of 215 posts

Re: GPT4 is 8 x 220B params = 1.7T params

#31

I wouldn’t trust anything geohot says. He doesn’t have access to any inside information.

He doesn't strike me as the type of person to lie (except when trolling). His reputation is solid enough that I'm sure he's had discussions with people in the space.

This wasn’t very impressive: https://www.pcmag.com/news/hacker-george-hotz-resigns-from-t...

Spent two weeks trying to find someone to build a faceted search UI and then quit.

Re: GPT4 is 8 x 220B params = 1.7T params

#33

Earlier quoted context omitted.

He doesn't strike me as the type of person to lie (except when trolling). His reputation is solid enough that I'm sure he's had discussions with people in the space.

>his reputation is solid Eh, is it? Not sure if I consider him an authority on anything anymore. https://www.reddit.com/r/ProgrammerHumor/comments/z2y8i0/fro... >This is the interview. Build this feature. You don't get source access. Link the GitHub and license it MIT. is akin to "Build this for free, license it MIT so I can use it without any issues, and oh, btw, I dont have authority to hire you, teehee."

Well he picked the right problem at the time which was (and still is!) search. I was really looking forward to some progress on this and then he deleted tweets and dropped off the system. I would love to see a podcast of him talking about that & fyi @realGeorgeHotz is back on it now to promote Tiny grad/box/corp.

Re: GPT4 is 8 x 220B params = 1.7T params

#34
weird title, note that the tweet said "so yes, GPT4 is *technically* 10x the size of GPT3, and all the small circle big circle memes from January were actually... in the ballpark?"

It's really 8 models that are 220B, which is not the same as one model that is 1.7T params. There have been 1T+ models via mixtures of experts for a while now.

Note also the follow up tweet: "since MoE is So Hot Right Now, GLaM might be the paper to pay attention to. Google already has a 1.2T model with 64 experts, while Microsoft Bing’s modes are different mixes accordingly"

There is also this linked tweet https://twitter.com/LiamFedus/status/1536791574612303872 - "They are all related to Switch-Transformers and MoE. Of the 3 people on Twitter, 2 joined OpenAI. Could be related, could be unrelated"

Which links to this tweet: "Today we're releasing all Switch Transformer models in T5X/JAX, including the 1.6T param Switch-C and the 395B param Switch-XXL models. Pleased to have these open-sourced!"

Anyway... remember not to just read the headlines, they can be misleading.

Re: GPT4 is 8 x 220B params = 1.7T params

#35
post #25

Earlier quoted context omitted.

It doesn't fit in VRAM.

I’ve been a bit surprised that Nvidia hasn’t gone to extreme lengths to fit 1tb of memory on a card just for this reason.

The issue, as pointed above, is primarily bandwidth (at inference), not addressable memory. Put simply, the best bandwidth stack we currently have is on-package HBM -> NVLink, -> Mellanox InfiniBand, and for inference speed you really can't leave the NVLink bandwidth (read, 8x DGX pod) for >100b parameters. And stacking HBM dies is much harder (read, expensive) than GDDR dies which is harder than DDR etc.

Cost aside, HMB dies themselves aren't getting significantly denser anytime soon, and there just simply isn't enough package space with current manufacturing methods to pack a significantly increased number of dies on the gpu.

So I suspect the major hardware jumps will continue to be with NVLink/NVSwitch. Nvlink 4 + NVSwitch 3 actually already allows for up 256x GPUs https://resources.nvidia.com/en-us-grace-cpu/nvidia-grace-ho... ; increased numbers of links will let ever increasing numbers of GPUs pool with sufficient bandwidth for inference on larger models.

As already mentioned, see this HN post about the GH200 https://news.ycombinator.com/item?id=36133226, which has some further discussion about the cutting edge of bandwidth for Nvidia DGX and Google TPU pods.

Re: GPT4 is 8 x 220B params = 1.7T params

#36
post #3
post #2

Is this still orders of magnitude smaller than a human brain? How many? Based on current human neurons/synapses knowledge?

2 orders of magnitude smaller, assuming 100T synaptic connections in the human brain.

In the podcast they talk about 20 Peta FLOPS as the human brain equivalent for measuring comparison.

Re: GPT4 is 8 x 220B params = 1.7T params

#37
post #15
post #3

Earlier quoted context omitted.

2 orders of magnitude smaller, assuming 100T synaptic connections in the human brain.

It’s remarkable. I’m curious how long until people are just using training brains in a jar to compute.

They already are, for the hyperhyperparameter choices.

Re: GPT4 is 8 x 220B params = 1.7T params

#38
Are the models specifically trained to be experts in certain domains?

Or the models are all trained on the same corpus, but just queried with different parameters?

Is this functionally the same as beam search?

Do they select the best output on a token-by-token basis, or do they let each model stream to completion and then pick the best final output?

Re: GPT4 is 8 x 220B params = 1.7T params

#39

Earlier quoted context omitted.

He doesn't strike me as the type of person to lie (except when trolling). His reputation is solid enough that I'm sure he's had discussions with people in the space.

This wasn’t very impressive: https://www.pcmag.com/news/hacker-george-hotz-resigns-from-t... Spent two weeks trying to find someone to build a faceted search UI and then quit.

I think deciding to get away from the Musk/Twitter debacle as soon as you realize how bad it is isn't necessarily a bad thing..

Re: GPT4 is 8 x 220B params = 1.7T params

#40
post #2

Is this still orders of magnitude smaller than a human brain? How many? Based on current human neurons/synapses knowledge?

We really have no idea how to directly compare the two. Also, vast portions of the human brain are dedicated to the visual cortex, smelling, breathing, muscle control... things which have value to us but which don't contribute to knowledge work when evaluating how many parameters it would take to replace human knowledge work.

on top of that I would add that humans have very high DPI touch sensors across full body (skin)
Post reply on HN