GLM-5.1 is Z.AI's next-gen model optimized for long-horizon agent workflows and deep reasoning. Running inside a TEE (Trusted Execution Environment), with provider attestation support.
Added Apr 20, 2026
Context Window
202.8K
Max Output
65.5K
Input Price
$1.50/1M
Output Price
$5.25/1M
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
51.4
Coding Index
43.4
GPQA Diamond
Graduate-level scientific reasoning
86.8%
Better than 93% of models compared
HLE
Humanity's Last Exam
28.0%
Better than 93% of models compared
IFBench
Instruction-following benchmark
76.3%
Better than 96% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
97.7%
Better than 99% of models compared
AA-LCR
Long context reasoning evaluation
62.3%
Better than 82% of models compared
SciCode
Python programming for scientific computing
43.8%
Better than 90% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
43.2%
Better than 93% of models compared
Last updated May 11, 2026
Artificial Analysis