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GLM 5.1

GLMv5.1Current
byZ.aiZ.ai(ai lab)
Released April 7, 2026
API DocsPlayground
54
OpenTools Scorenormalized /100
26.2
Valuescore / $M
OpenTools Score
Context202.8K tokens
Price (In / Out)$0.95/M / $3.15/M
CategoryLarge Language Model
Max Output65.5K tokens

About GLM 5.1

GLM 5.1 is a large language model from Z.ai. Supports up to 202,752 token context window. Available from $0.95/M input tokens.

Capabilities

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Input Modalities

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Output Modalities

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Technical Details

API Identifier
z-ai/glm-5.1
Category
Large Language Model
Context Window
202,752 tokens
Max Output Tokens
65,535 tokens

Tags

budget-friendlylong-context

Benchmarks

Performance scores for GLM 5.1 across standard benchmarks.

GPQA Diamondhttps://huggingface.co/zai-org/GLM-5.1
86.2%
Artificial Analysis Intelligence Index v4.3Artificial Analysis
26.4455%
GPQA DiamondArtificial Analysis
86.7677%
SciCodeArtificial Analysis
44.7917%
Terminal-Bench 2.1Artificial Analysis
61.7978%

Pricing

Token pricing for GLM 5.1 API usage.

Input Tokens

$0.95/M

per million tokens

Output Tokens

$3.15/M

per million tokens

Pricing Calculator

Input cost$0.95
Output cost$1.58
Estimated monthly cost$2.53

Cache read: $0.4750/M tokens

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4 Models
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4 Models

AI Models by Z.ai

Large language models from the same organization.

ModelContext WindowPrice (In / Out per M)
GLM-5.3-FlashCurrent1.3M$0.07 / $0.25
GLM 5V TurboCurrent203K$1.20 / $4.00
GLM 5 TurboCurrent203K$1.20 / $4.00
GLM 5Current203K$0.72 / $2.30
GLM-5.2Current1.0M$1.40 / $4.40