Z.ai GLM 5.2 is a large-scale reasoning model that excels at coding and tool use across long-running tasks. It maintains engineering context and follows standards consistently through a full development workflow. Accessed via OpenRouter with a context window of up to 1M tokens. Well suited for long-horizon agent workflows, project-level software engineering, and complex multi-step automation. Use the reasoning-effort dropdown to tune thinking depth; pick high or xhigh for hard problems. For everyday chat, Seed or the local models cost less; for deep Chinese-language work, consider Qwen 3.5. Maximum context window (input and output combined): about 1,048,576 tokens. Maximum output per reply: about 65,500 tokens (model reasoning, if any, counts toward this limit). Maximum total upload size per request: 256MB (all files and message content combined). Output content formats: Text This module does not support continuous conversations. AI can make mistakes. Please verify important information.