GLM-5.1
About GLM-5.1
GLM-5.1 is Z.ai's next-generation flagship model built for agentic engineering. It is designed to run continuously for hours or even longer, refining its strategy as it works—the longer it runs, the better the results.
Available Serverless
Run queries immediately, pay only for usage
Input Price
$
1.4
/ M Tokens
Cache Read
$
0.26
/ M Tokens
Output Price
$
4.4
/ M Tokens
Metadata
Specification
State
Available
Architecture
GLM MoE
Calibrated
No
Mixture of Experts
Yes
Total Parameters
744B
Activated Parameters
Reasoning
No
Precision
FP8
Context length
205K
Max Tokens
131K
Supported Functionality
Serverless
Supported
Serverless LoRA
Not supported
Fine-tuning
Not supported
Embeddings
Not supported
Rerankers
Not supported
Support image input
Not supported
JSON Mode
Not supported
Structured Outputs
Not supported
Tools
Supported
Fim Completion
Not supported
Chat Prefix Completion
Not supported
Compare with Other Models
See how this model stacks up against others.
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Release on: Apr 3, 2026
Total Context:
205K
Max output:
131K
Input:
$
1.4
/ M Tokens
Output:
$
4.4
/ M Tokens
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GLM-5V-Turbo
Release on: Mar 30, 2026
Total Context:
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Max output:
131K
Input:
$
1.2
/ M Tokens
Output:
$
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/ M Tokens
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Release on: Feb 12, 2026
Total Context:
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Max output:
131K
Input:
$
0.95
/ M Tokens
Output:
$
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/ M Tokens
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Release on: Dec 23, 2025
Total Context:
205K
Max output:
205K
Input:
$
0.42
/ M Tokens
Output:
$
2.2
/ M Tokens
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Release on: Dec 8, 2025
Total Context:
131K
Max output:
131K
Input:
$
0.3
/ M Tokens
Output:
$
0.9
/ M Tokens
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GLM-4.6
Release on: Oct 4, 2025
Total Context:
205K
Max output:
205K
Input:
$
0.39
/ M Tokens
Output:
$
1.9
/ M Tokens
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GLM-4.5-Air
Release on: Jul 28, 2025
Total Context:
131K
Max output:
131K
Input:
$
0.14
/ M Tokens
Output:
$
0.86
/ M Tokens
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GLM-4.5V
Release on: Aug 13, 2025
Total Context:
66K
Max output:
66K
Input:
$
0.14
/ M Tokens
Output:
$
0.86
/ M Tokens
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GLM-4.1V-9B-Thinking
Release on: Jul 4, 2025
Total Context:
66K
Max output:
66K
Input:
$
0.035
/ M Tokens
Output:
$
0.14
/ M Tokens
