Comment by _aavaa_

18 hours ago

Notably missing their kv cache system

It's exceptionally optimized... 890 bytes per token. At standard 32K context, that's less than 30MB.

1. https://huggingface.co/deepseek-ai/DeepSeek-V4.1-Flash

2. https://www.mindstudio.ai/blog/deepseek-v4-1-flash-specs-arc...

  • Sure, but that size/token is inherent to the model. Part of DeepSeek's hosting advantage, and thus a remaining part of their moat, is migrating KV cache from VRAM to host RAM to nonvolatile storage, and presumably routing requests to where KV cache has migrated. People here on HN say KV cache lifetimes can be 8+ hours with DeepSeek, and I don't know of any other provider that can match that. That infrastructure isn't part of this open-source release.

yeah they mention:

> Required for a complete inference service (not included in this release):

> A KV cache system

> VE/Prefill/Decode disaggregation (most required engine functionality is already implemented)

> Load balancing across data-parallel replicas for both prefill and decode

  • Yes, that's why I commented. I'm not sure I understand your point.

    • I was just adding a citation to your point, not arguing against you :)

      also adding what other stuff aren't included in the release, and implicitly pointing out that they explicitly mention it's not included rather than it being stealthily missing.