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Discussion Sentiment

89% Positive

Analyzed from 707 words in the discussion.

Trending Topics

#context#speed#models#actually#model#memory#running#https#gpu#vram

Discussion (17 Comments)Read Original on HackerNews

andai2 minutes ago
Has anyone gotten the old gpt-oss models running? They scored very high on benchmarks but I constantly had strange problems with them.

So two questions there:

(1) is it actually possible to get good results with them (some people said they got good results, which implies that it might have been hard to get them running properly, but if you can, then they're actually good?). Which also implies the second question,

(2) are benchmarks a spook?

---

...Also, is OP Claude?

jordiburgosabout 2 hours ago
This is very helpful too: https://www.canirun.ai/
embedding-shapeabout 1 hour ago
Love that it defaults to the GPU being "NVIDIA GeForce 8800 GTX", a GPU released in 2006 with ~700MB of VRAM...

The estimates seems far off as well, took https://www.canirun.ai/model/gpt-oss-120b as an example, with a RTX Pro 6000 and every single number is off, and notably misses estimation for the most important quant for GPT-OSS, the MXFP4 variant.

freeCandy44 minutes ago
Every browser gives me a different result, I guess I can't blame the site for that. But it should perhaps mention which browser would be the most accurate.
kilroy12338 minutes ago
Yes, I really like this site too, but it's a bit outdated.

"39d ago" in AI time is like 1 year outdated info.

pornelabout 2 hours ago
It looks nice. I've been searching for something like this recently, and was frustrated with rankings that lack latest models or don't clearly distinguish quantizations.

Showing quality loss per quantization is nice.

I'd prefer this as a website, since I'd handle running of the model with a dedicated inference server anyway.

It would be nice to see what's the maximum context length that can fit on top of the baseline.

I was surprised how much token generation speed tanks when using very long context. 30/s can drop down to 2/s. A single speed metric didn't prepare me for that.

I was also positively surprised that some models scale well with batch parallelism. I can get 4x speed improvement by running 8 requests in parallel. But this affects memory requirements, and doesn't apply to all models and inference engines. It would be nice to show that. Some sites fold it into "what's your workflow", but that's too opaque.

KV cache quantization also makes a difference for speed, VRAM usage and max usable context.

On Apple Silicon MLX-compatible model builds make a difference, so I'd like to see benchmarks reassure they're based on the fastest implementation.

Multi-token-prediction is another aspect that may substantially change speed.

wald3n6 minutes ago
Cool idea, thanks for making this
Bigsyabout 2 hours ago
Brew install is broken

It seems pretty rubbish I have to say, its recommending me loads of qwen 2.5 which are really old and I'm easy running qwen3.5 and 3.6 models on this mac at decent quants

vachinaabout 1 hour ago
AI slop quality software for ya.

“I release software now, good luck everyone”

sleepyeldraziabout 2 hours ago
I love this community, I started building a simple website for this exactly a couple of hours ago and you made an even more advanced version already. Hats off to you sir.

If i ever decide to actually publish the site, is it alright if I mention you somewhere as a "If you want a more accurate estimation, check out this project:<your repo>", as i think there is value in having a simple website estimate this information for you, and give you instructions/ common flags on how to start it yourself (also a prompt crafted for you to optionally give to an llm to set it up for you), but im going off simple "choose an os, gpu/vram, here's a list of options" and not actually scanning (which is a lot more accurate).

Jasssssabout 2 hours ago
The plan command is clever. How do you handle the VRAM estimation for models with sliding window attention vs full context? Something like Mistral at 32k context uses way less KV cache than Llama at the same context length, but from the README it looks like the estimation is based on a fixed context size. Does it account for that?
llagerlofabout 2 hours ago
What’s new regarding llmfit?

https://github.com/AlexsJones/llmfit

rvzabout 2 hours ago
Other than it (whichllm) being written in Python, nothing else.

I just use llmfit.

cyanydeezabout 1 hour ago
This doesn't correclty detect the unified memory architecture for

GPU 0: STRXLGEN — 8.0 GB (ROCm 6.19.8-200.fc43.x86_64) — BW: N/A CPU: AMD RYZEN AI MAX+ 395 w/ Radeon 8060S — 16 cores (AVX2, AVX-512)

The 8GB is the reserved memory, but it's not the total available memory to the GPU.

Linux sets the unified memory like this on linux: https://www.jeffgeerling.com/blog/2025/increasing-vram-alloc...

Don't feel bad though, nvtop doesn't do it correctly either.

kramit1288about 2 hours ago
accurate memory estimation is key here. it will crash if that accurate and it cant be generic for all local llm. each local llm has different context estimates.
macwhispererabout 2 hours ago
can you add in the other quants like IQ3_M?

also my personal simple rule of thumb for local ai sizing is:

max model size (GB) = ram (GB) / 1.65

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pbronezabout 2 hours ago
Cool, but it looks like it doesn’t actually test anything on your machine? It does hardware detection and then some lookups. Maybe I missed it but I really want a tool like this to actually run a model on my machine to get the speed numbers.

I’ve been using RapidMLX for this. The integrated speed tests matter because the quality of the backend is a moving target and the quantization / MLX format conversion also matter. It’s not enough to say “oh use this model family with X parameters” you have to add the architecture specific quantization too.

https://github.com/raullenchai/Rapid-MLX