GLM 5.2: the top Frontend Coding model in the world, IndexShare reduces costs

**Z.ai released GLM-5.2**, an MIT-licensed open-weight frontier model targeting **coding and long-horizon agentic tasks** with a **1M-token context window** and **two reasoning-effort modes**. It features a **744B-parameter mixture-of-experts architecture** with **40B active parameters per token**, built on **DeepSeek Sparse Attention** extended by **IndexShare**, and supports improved **multi-token prediction (MTP)** for speculative decoding. The model achieved strong leaderboard placements, including **#3 on FrontierSWE**, **#1 on Design Arena**, and **#1 open model on Agent Arena**, with ecosystem support from platforms like **Transformers, vLLM, SGLang, Cloudflare Workers AI, OpenRouter, Ollama Cloud, Baseten, DeepInfra, Fireworks, and Notion**. Early testers praised its potential as a substitute for Opus/GPT-class workflows, though some called for further evaluation and long-horizon validation.