DeepSeek V4.1-Flash: KV cache 437x smaller, ~40x cheaper than Claude Opus 4.8
AdinaYakup · x · 2026-09-10
Analysis of DeepSeek V4.1 Flash shows striking specs:
- Asymmetric causal encoder-decoder: 550B MoE with 8B active on input / 16B on output
- Native vision merged into a single endpoint
- KV cache crushed: 1/4 the HBM of the last gen, 437x smaller than their first model
- Pricing: $0.6/M output off-peak — 6x cheaper than flagship Flash models, 40x under Claude Opus 4.8 and GPT-5.6
- The "Flash" variant even beats their own flagship V4 Pro
The model is open on Hugging Face under MIT license.
More from Infra
- Anthropic S-1: training infra edge cut per-task cost 40% and doubled revenue growth — BenBajarin · 2026-10-26
- Rewriting scaling law study: optimal synthetic data share rises from 10% to 32% with compute — heghbalz · 2026-10-26
- US states halt new data centers as 72% of Americans oppose local builds — YvesMulkers · 2026-10-26
- $5M Seed Round Can't Afford One DeepSeek Training Run: GPU-less AI Startup's Three Paths — FinanceYF5 · 2026-10-26
- HBM demand shifts: low-stack inference plans shelved, Rubin to go 12-high only — BenBajarin · 2026-10-26
- CircuitHub unveils The Grid, a factory-scale robot making PCBs in the US twice as fast as Shenzhen — garrytan · 2026-10-26