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GLM-4.6 is the latest iteration in the GLM series by Zhipu AI, designed as a large language model with about 355 billion parameters in a Mixture of Experts (MoE) architecture. It is optimized for various complex tasks including real-world coding, long-context processing, advanced reasoning, intelligent agent applications, and refined writing. The model features an expanded context window of 200,000 tokens (up from 128,000 in GLM-4.5), allowing it to handle longer and more complex interactions such as extensive documents or multi-turn conversations.

GLM-4.7 is Z.AI’s latest flagship model, featuring upgrades in two key areas: enhanced programming capabilities and more stable multi-step reasoning/execution. It demonstrates significant improvements in executing complex agent tasks while delivering more natural conversational experiences and superior front-end aesthetics.

GLM-5 is Z.ai’s flagship open-source foundation model, built for complex system design and long-horizon agent workflows. Aimed at expert developers, it delivers production-grade results on large-scale programming tasks and competes with top closed-source models. With strong agentic planning, deep backend reasoning, and iterative self-correction, GLM-5 goes beyond code generation to help design, build, and execute complete systems end-to-end.

zai-org/GLM-5.1 is Z.AI's (formerly Zhipu AI) open-weight, instruction-tuned coding flagship model—a refreshed upgrade over GLM-5—excelling in agentic engineering, complex system programming, and long-horizon tasks with SOTA open-source performance approaching Claude Opus 4.6.

GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level software engineering,...

GLM-5.3 is Z.ai’s latest GLM-5-series flagship, a 743B-parameter text-only foundation model post-trained from GLM-5.2 for frontier-level coding, long-horizon agentic workflows, and defensive cybersecurity analysis. It inherits GLM-5’s 200K-token context window and up to 128K-token outputs, supports advanced reasoning and tool use, and is initially exposed through Z.ai’s coding plan and forthcoming API access.