not much happened today

**Moonshot AI** launched **Kimi K3**, a frontier-class open-weights model with **2.8T parameters**, **1M-token context window**, and **native multimodal input**. It features novel **Kimi Delta Attention (KDA)** enabling up to **6.3x faster decoding** and **Attention Residuals** for **~25% higher training efficiency**. K3 is live on multiple platforms with open weights promised by **July 27, 2026**. It leads in **Frontend Code Arena** with a **76% pairwise win rate**, ranking above **Claude Fable 5** and **GPT-5.6 Sol** in several benchmarks, though still behind these models in overall user experience. Independent evaluations place K3 comparable to **Opus 4.8** and **GPT-5.5** but behind Fable 5 and GPT-5.6 Sol. The launch is seen as a major open-model milestone.