Z.ai
GLM-4.5Open Weight
GLM-4.5 is an AI model released by Z.ai on Jul 28 2025, 333 days after GLM-4-Plus. It is an open-weight model — the trained weights are available to download and run. Benchmark results (shown below) cover SWE-Bench Verified, and GPQA Diamond.
Parameters
355B
Context window
128k
Benchmarks
Coding
SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better.
64.2%
Science
GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better.
79.1%