logoalt Hacker News

Cerebras CS-4

135 pointsby sunils34today at 12:28 AM87 commentsview on HN

Comments

syntaxingtoday at 1:42 AM

I think the fun takeaway from this is that GPT 5.4 is probably 45B active parameters and GPT 5.6 Sol is closer to 50B.

show 1 reply
sreekanth850today at 2:00 AM

AMD along with cerebras may probably compete with NVIDIA monopoly in near future. Also, NVIDIA will have competition form multiple companies. Just my prediction.

avantnyctoday at 3:58 AM

Cerebras should slowly also move to dgx/ryzen market for a desktop version for masses at affordable price yet providing substantial tokens/second on desktop

reilly3000today at 2:05 AM

> CS-4 delivers more than 1,000 tokens per second on models exceeding 10 trillion parameters

Oops did they just out GPT-5.6 sol’s parameter count?

show 2 replies
aneryutoday at 2:36 AM

It would be even better if a version available to individual users were released soon.

show 2 replies
denizaytoday at 4:01 AM

The comparison seems incomplete. CS‑4 is a full rack-scale system with three wafer-scale processors, but the exact GPU models, GPU count, power consumption, price information are not disclosed. We still don't know if buying a multi-GPU rack (or racks) is cheaper and/or more efficient in power. The fact that they didn't disclose these numbers makes me believe that the numbers are not in their favor. And personally, makes me see them as disingenuous.

anonymous_user9today at 1:36 AM

Conspicuously missing: power consumption figures

show 2 replies
kobe_bryanttoday at 3:53 AM

can these vibe coded sites please set a max width and overflow so their sites work fine on mobile

ethanzhang1024today at 2:18 AM

If cerebars is performing well, why didn't its predecessor, server S-3, become the largest API token provider on OpenRouter, surpassing the official model releases?

show 3 replies
9cb14c1ec0today at 1:26 AM

Just a reminder for everyone that we are only several years and 3 or 4 iterations into hardware being optimized for LLMs. We should all expect orders of magnitude improvement in speed and/or cost over the next 5 years. Then we can have fun conversations about "unlimited" "intelligence" and about what the price wars and profit margins of consumer AI products are when your average ChatGPT user costs the company $0.10 per month.

> CS-4 delivers more than 1,000 tokens per second on models exceeding 10 trillion parameters

Wow!

show 3 replies
4k0hztoday at 1:38 AM

> Introducing the all new Cerebras CS-4, a revolutionary rack-scale solution that delivers upto 30x faster inference compared to GPUs, enhanced economics, and a simple path todeploy [sic] hyperscale capacity.

Did nobody proofread this?

show 4 replies
lostmsutoday at 2:11 AM

KV caching status?

What's the point of 1000tok/s if you have to do prefill on every agentic turn which at 100k depth would make it 1.5 min latency every turn?

show 1 reply
sva_today at 2:39 AM

> enabling massive clusters and models with more than 50 trillion parameters

OutOfHeretoday at 1:37 AM

Five years from now, I don't know why anyone will still be using Nvidia for inference. Note that Cerebras is for inference only, not for training.

show 1 reply
tamimiotoday at 2:10 AM

I wonder what are the benchmarks of hashcat on different hashes.

gpmtoday at 1:47 AM

Is it just me or is it bizarre that they're advertising old open-weight models.

GLM 4.7 (December 2025) not 5 (Feb) 5.1 (April) or 5.2 (June). 5.3 (4 days ago) is, to be fair, not open weights yet... but there's a lot since 4.7.

Kimi K2.7 (April) not K2.7-code (June) or K3 (July).

Gemma 4 (April), Llama (April), and gpt-oss (August 2025) are up to date, but old (for models).

Meanwhile the closed source GPT 5.6 sol is up to date (June)...

Should potential purchasers take away from this that they're not going to be able to run recent models unless they front the cost of developing software or something?

show 1 reply