ModelBeat
Models/GLM-5.1
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Z.ai (Zhipu AI): GLM-5.1

z-ai/glm-5.1

GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks.

Context
203K
Input
$0.98 / 1M
Output
$3.08 / 1M
Released
Apr 7, 2026
Modalities
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Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where GLM-5.1 lands among all models tracked on Model Beat.

60.0
Intelligence Index
Epoch AI
60th percentile of tracked models
69.0
Coding Index
Epoch AI
69th percentile of tracked models

Reasoning

4 evals
GPQA Diamond85.5%

Graduate-level scientific reasoning

SimpleBench58.7%

Common-sense trick questions

SimpleQA Verified37.3%

Factual accuracy & hallucination

WeirdML57.1%

Novel ML problem-solving

Coding

2 evals
SWE-bench Verified74.2%

Real GitHub issue resolution

WebDev Arena1534

Human-rated web development

Math

3 evals
AIME 2024/202592.2%

Olympiad-qualifier math

FrontierMath33.4%

Research-level math problems

FrontierMath Tier 412.5%

Hardest research math

In the news

5

Model & benchmark data from Epoch AI (CC BY); pricing, specs & descriptions from OpenRouter.