Media Zone | 2026-07-28

A thin paper day where the loud signal was open-weights (Kimi K3 shipping) versus closed pricing (Opus 5 at half cost), plus China's WAIC safety turn. Twitter mostly amplified Kimi K3.

Today's signal

• Dominant story: Kimi K3 open weights (2.8T MoE) ship with an open serving library (MoonEP).
• Counter-move: Anthropic's Opus 5 lands at ~half cost the same week — a price war.
• Policy: Xi's most safety-forward AI speech yet at WAIC; first intergovernmental AI body (WAICO) founded.
• Efficiency undercurrent: two cache papers say stop recomputing verified work.
• Quiet area: HuggingFace batch thin (top paper 35 upvotes); Kurate + newsletters carried the day.

Routing, KV cache, compression, GPU

The cache as capability

• Frozen 12B + verified memory: 180/180 at zero generation tokens, bit-exact.
• KV-eviction error certificates: deterministic eviction can't know what it destroyed; randomize to measure.
• Both descend from July 17 byte-exact KV grafting (same Corbenic group).
• Kimi K3 open-sources MoonEP, beating DeepSeek's DeepEP in vLLM/SGLang.

LLMs, agents, safety

Open weights vs closed pricing

• Kimi K3: 2.8T MoE, 104B active, native vision, 1M context, ~2.5x K2 efficiency.
• Claude Opus 5: near-frontier at ~half the cost, days after Kimi K3.
• Cross-source confirmed: Kimi K3 heavy on HF top + curated Twitter.

Industry and business

WAIC and the open-weights shadow

• Xi's most safety-forward AI speech: "loss of control" three times.
• WAICO founded: first intergovernmental AI body, 29 mostly-Global-South members.
• WAIC Chair Statement names frontier cyber risk (first since Mythos).
• NVIDIA -5% on $500B SK LOI + reported OpenAI-Ohio financing talks; The Information says don't panic (only LOIs).