alt Hacker NewsIs there anything particular about LLMs that would make separating customer data harder than in all SaaS cases?
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Vibe-coding the implementation.
I haven't had much issue with Codex, but seems Claude Code has major issues being reported nearly on the daily.
They also happen to be the most boastful about not reading or looking at the code.
LLMs are very capable, but not nearly to the level they seem to be messaging.
(We've actually moved on from vibe-coding to having the LLM vibe code itself in a loop)
If I had to hazard a guess, doing anything in a multi-tenant way on a GPU is going to be hard mode compared to most SaaS due to lack of memory safe tooling. I've built multi-tenant SaaS systems, and I've done a little GPU programming (a long time ago), but I've never tried to combine the two disciplines.
It'd be terribly compute inefficient to not share prefix caches (KV cache) across customers.
Yes:
* There's an enormous amount of very expensive shared state (context cache) which you do not want to duplicate when you can avoid it.
* Memory locality is crucially important for performance.
* Hardware is extremely over-subscribed.
* Hardware is extremely expensive.
These factors all make hardware or even traditional memory-space (hypervisor/VM/hardware assisted virtualization) isolation a non-starter for most workloads and customers, which forces all isolation to the software layer. This already makes things way harder than they are in commodity SaaS.
Moving beyond that, the tools, frameworks, and hardware which the system runs on (GPU) wasn't designed for task isolation and building this isolation is even moreso an emergent research field than it is in x86 CPU hardware-sharing (which has required a huge amount of effort over the past 30+ years to get where we are today).
And, the ratio of usage/sensitivity to maturity is also just poor overall; these are young companies with rapid development and enormous delivery pressure under incredible customer workload requirements, too.
I can't tell if the original post is a real issue or not, but I'm surprised there aren't more like this overall; the whole thing really is a house of cards in this sense.