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Person: "yulun_du"
not much happened today
kimi-k3 moonshot-ai arena artificial-analysis multimodality long-context attention-mechanisms model-efficiency model-performance agentic-ai coding benchmarking model-release scaling01 eliebakouch kimmonismus nrehiew_ jianlin_s yulun_du
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.