Weekly Situation Recap 10/19-10/25: Moonshot AI releases Kimi K3.1 Pro, which matches Claude Opus 5.5 and GPT-6 Astra on a number of benchmarks. Arena finds that it outperforms all non-OpenAI/Anthropic models (except Gemini 4 Argon and Muse Wonder Full) on agentic tasks. It also excels at 3D modeling. The model is a 2.8T parameter mixture-of-experts with 104B active parameters and costs $2/$10 per million input/output tokens, which is half as much as Opus but substantially more than other…