GLM-4.6Open Weight
GLM-4.6 is an AI model released by Z.ai on Tuesday, Sep 30 2025, 64 days after GLM-4.5-Air. It is an open-weight model — the trained weights are available to download and run. It is a 355B parameter model with a 200k token context window. Benchmark results (shown below) cover SWE-Bench Verified.
Benchmarks
About GLM-4.6
GLM-4.6, released September 30, 2025, refined Z.ai's 355B open-weight flagship with a context window expanded from 128K to 200K tokens and markedly stronger real-world coding — 68.0% on SWE-Bench Verified, up eight points from GLM-4.5, with token efficiency improvements that cut the cost of agentic runs.
Positioned aggressively against Claude Sonnet 4.5 (released the very next day) at a fraction of the price, GLM-4.6 became a staple budget option in coding agents like Claude Code-compatible harnesses and Cline. GLM-4.7 continued the line in December 2025 before the 744B GLM-5 generation arrived in February 2026.