GLM 5.1

The ai glm 5.1 is a flagship bilingual model from Zhipu AI. Featuring native multimodal vision and advanced agentic reasoning, it matches GPT-4o performance while offering superior Chinese linguistic nuance and a 128k token context window.

Modalities

Context

API Usage Examples

curl --request POST "https://gptproto.com/v1/chat/completions" \
  --header "Authorization: Bearer $GPTPROTO_API_KEY" \
  --header "Content-Type: application/json" \
  --data '{
    "model": "glm-5.1",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

GLM 5.1 pricing

Chat, coding agents & document work. Priced per 1M tokens — input, cached input and output are billed separately. GPTProto is 10% below official rates.

Your usage

Model

Z-AI · ≈ 148M tokens/mo (48M cached)

Monthly volume

OpenRouter

List + 5.5% credit fee

$153.27

per month

Input (non-cached)$47.26

Cache read$13.1664

Output$92.84

Z-AI

Direct from Z-AI (list price)

$145.28

per month

Input (non-cached)$44.80

Cache read$12.48

Output$88

BEST VALUE

GPTProto

10% off official

$130.75

per month

After discount$130.75

Effective$130.75

Monthly cost by source

OpenRouter

$153.27

Z-AI

$145.28

GPTProto

$130.75

Save $14.53 / month

on GPTProto vs Z-AI (−10%)

Annual savings ≈ $174.34 · pay as you go

OpenRouter costs include its ~5.5% credit purchase fee. GPTProto applies a per-model discount (10–30% off) and your bonus credits are also spent at discounted rates — savings compound. Estimates assume a 60% cache hit rate.

Related Models

All Models

GLM 5.1

Current

byZ-AI205K context$1.26/M input$3.96/M output

DeepSeek Flash

byDeepSeek$0.3/M input$1.2/M output

Hy4 Preview

byHunyuan1.05M context$0.7923/M input$2.376/M output

GPT 6 Astra

byOpenAI1.05M context$8/M input$40/M output

Gemini 3.8 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Claude Fable 5.1

byClaude1M context$9/M input$45/M output

Qwen3.8 Max 0902

byQwen1M context$1.8/M input$5.4/M output

GLM 5.3 Flash

byZ-AI1.31M context$0.15/M input$0.5/M output

DeepSeek v4 Flash Vision Exp

byDeepSeek1.05M context$0.3/M input$1.2/M output

GLM 5.3

byZ-AI1.31M context$1.26/M input$3.96/M output

Gemini 3.7 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Grok 4.6

byGrok500K context$1.2/M input$3.6/M output

Qwen3.8 Max

byQwen1M context$1.8/M input$5.4/M output

Claude Opus 5

byClaude1M context$4.5/M input$22.5/M output

Gemini 3.6 Flash

byGoogle1.05M context$0.9/M input$4.5/M output

Kimi K3

byMoonshotAI1.05M context$2.7/M input$13.5/M output

GPT 5.6 Luna

byOpenAI1.05M context$0.16/M input$0.96/M output

GPT 5.6 Terra

byOpenAI1.05M context$1.6/M input$9.6/M output

Grok 4.5

byGrok500K context$1.2/M input$3.6/M output

Claude Sonnet 5

byClaude1M context$1.8/M input$9/M output

Minimax M3

byMiniMax1.05M context$0.48/M input$0.96/M output

GLM 5.2

byZ-AI1.05M context$1.26/M input$3.96/M output

Qwen3.7 Max

byQwen1M context$0.36/M input$1.44/M output

DeepSeek v4 Flash

byDeepSeek1.05M context$0.3/M input$1.2/M output

Grok 4.3

byGrok1M context$0.75/M input$1.5/M output

Kimi K2.6

byMoonshotAI262K context$0.855/M input$3.6/M output

GLM 5 Turbo

byZ-AI203K context$1.08/M input$3.6/M output

Minimax M2.5

byMiniMax205K context$0.24/M input$0.96/M output

Kimi K2.5

byMoonshotAI262K context$0.54/M input$2.7/M output

GLM 5

byZ-AI205K context$0.9/M input$2.88/M output

Doubao Seed 1.6 Thinking (Build 250715)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Thinking (Build 250615)

byBytedance262K context$0.0971/M input$0.9714/M output

Doubao Seed 1.6 Flash (Build 250615)

byBytedance262K context$0.0182/M input$0.1821/M output

Model					Input → Output
GLM 5.1Current $		205K	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: Document Output: Text
DeepSeek Flash $	—	—	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: TextInput: Image Output: Text
Hy4 Preview $		1.05M	$0.79 / $2.38 per 1M	— / $0.04 per 1M	Input: Text Output: Text
GPT 6 Astra $		1.05M	$8.00 / $40.00 per 1M	$10.00 / $0.80 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.8 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
Claude Fable 5.1 $		1M	$9.00 / $45.00 per 1M	$11.25 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.8 Max 0902 $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: DocumentInput: Audio Output: Text
GLM 5.3 Flash $	—	1.31M	$0.15 / $0.50 per 1M	— / $0.03 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
DeepSeek v4 Flash Vision Exp $	—	1.05M	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: TextInput: Image Output: Text
GLM 5.3 $		1.31M	$1.26 / $3.96 per 1M	— / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.7 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.6 $		500K	$1.20 / $3.60 per 1M	— / $0.30 per 1M	Input: TextInput: Image Output: Text
Qwen3.8 Max $		1M	$1.80 / $5.40 per 1M	$2.25 / $0.23 per 1M	Input: TextInput: ImageInput: VideoInput: Document Output: Text
Claude Opus 5 $		1M	$4.50 / $22.50 per 1M	$5.63 / $0.45 per 1M	Input: TextInput: ImageInput: Document Output: Text
Gemini 3.6 Flash $		1.05M	$0.90 / $4.50 per 1M	$0.60 / $0.09 per 1M	Input: TextInput: ImageInput: Document Output: Text
Kimi K3 $		1.05M	$2.70 / $13.50 per 1M	$0.27 / $0.27 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Luna $		1.05M	$0.16 / $0.96 per 1M	$0.20 / $0.02 per 1M	Input: TextInput: ImageInput: Document Output: Text
GPT 5.6 Terra $		1.05M	$1.60 / $9.60 per 1M	$2.00 / $0.16 per 1M	Input: TextInput: ImageInput: Document Output: Text
Grok 4.5 $		500K	$1.20 / $3.60 per 1M	$0.30 / $0.30 per 1M	Input: TextInput: Image Output: Text
Claude Sonnet 5 $		1M	$1.80 / $9.00 per 1M	$2.25 / $0.18 per 1M	Input: TextInput: Document Output: Text
Minimax M3 $		1.05M	$0.48 / $0.96 per 1M	$0.10 / $0.10 per 1M	Input: TextInput: ImageInput: Document Output: Text
GLM 5.2 $		1.05M	$1.26 / $3.96 per 1M	$0.23 / $0.23 per 1M	Input: TextInput: ImageInput: Document Output: Text
Qwen3.7 Max $		1M	$0.36 / $1.44 per 1M	$0.07 / $0.07 per 1M	Input: TextInput: Document Output: Text
DeepSeek v4 Flash $	—	1.05M	$0.30 / $1.20 per 1M	— / $0.006 per 1M	Input: Text Output: Text
Grok 4.3 $		1M	$0.75 / $1.50 per 1M	$0.12 / $0.12 per 1M	Input: TextInput: Image Output: Text
Kimi K2.6 $		262K	$0.85 / $3.60 per 1M	$0.14 / $0.14 per 1M	Input: TextInput: Document Output: Text
GLM 5 Turbo $		203K	$1.08 / $3.60 per 1M	$0.22 / $0.22 per 1M	Input: TextInput: Document Output: Text
Minimax M2.5 $		205K	$0.24 / $0.96 per 1M	$0.30 / $0.02 per 1M	Input: TextInput: Document Output: Text
Kimi K2.5 $		262K	$0.54 / $2.70 per 1M	$0.09 / $0.09 per 1M	Input: TextInput: Document Output: Text
GLM 5 $		205K	$0.90 / $2.88 per 1M	$0.18 / $0.18 per 1M	Input: TextInput: Document Output: Text
Doubao Seed 1.6 Thinking (Build 250715) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Thinking (Build 250615) $		262K	$0.10 / $0.97 per 1M	—	Input: TextInput: Image Output: Text
Doubao Seed 1.6 Flash (Build 250615) $		262K	$0.02 / $0.18 per 1M	—	Input: TextInput: Image Output: Text

Key Features of the ai glm 5.1 Model

The ai glm 5.1 offers industry-leading features including a native Python interpreter, 128k context recall, and state-of-the-art Chinese-English linguistic understanding.

Native Multimodal Vision

This ai model uses an integrated vision encoder to interpret diagrams and UI layouts with high precision.

Advanced Agentic Logic

Built for autonomous loops, the ai natively executes Python code and web searches to solve multi-step problems.

128k Long Context

Analyze massive documents with 99.8% needle-in-a-haystack accuracy, ensuring the ai never misses critical facts.

Bilingual Precision

Outperforms global competitors in translation and localized compliance for the Greater China market needs.

ai glm 5.1 Common Questions and Technical Info

Find detailed answers about the ai glm 5.1 context window, multimodal vision capabilities, tool-calling success rates, and how to integrate this ai model into your current tech stack.

How does ai glm 5.1 handle bilingual tasks?

This ai model excels in Chinese-English translation and cultural nuance. Compared to Western models, it follows Chinese instructions with higher precision, making it the top choice for developers targeting East Asian markets where linguistic accuracy is critical.

What are the ai glm 5.1 multimodal capabilities?

The native vision encoder allows this ai to process high-resolution images, OCR, and complex spatial reasoning without extra adapters. It can analyze architectural diagrams or UI layouts directly alongside text prompts for unified reasoning.

How reliable is the ai glm 5.1 128k context?

Testing shows 99.8% accuracy in needle-in-a-haystack benchmarks across the full window. This makes the ai perfect for analyzing long technical documents or large corporate data repositories without losing track of specific facts or details.

Can this ai use external tools and functions?

Yes, it features a native 'All-Tools' backbone for autonomous loops. The ai can call Python interpreters, search engines, and custom functions in a single turn, achieving a 92% success rate in complex tool-calling and agentic workflows.

Is ai glm 5.1 pricing competitive?

At $1.50 per 1M tokens for both input and output, this ai is significantly more affordable than GPT-4o. GPTProto.com also offers a 50% discount on cached input hits, providing a high-performance alternative at a lower operational cost.

How do I migrate my app to use this ai?

Migration is simple as the ai uses an OpenAI-compatible structure. Just update your base URL and model parameter to glm-5.1. GPTProto.com provides unified billing and regional failover to ensure 99.9% uptime for your production apps.

Guides, comparisons, and updates related to this model.

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Key Features of the ai glm 5.1 Model

Native Multimodal Vision

Advanced Agentic Logic

128k Long Context

Bilingual Precision

How does ai glm 5.1 handle bilingual tasks?

What are the ai glm 5.1 multimodal capabilities?

How reliable is the ai glm 5.1 128k context?

Can this ai use external tools and functions?

Is ai glm 5.1 pricing competitive?

How do I migrate my app to use this ai?

Related Articles

glm5.1: A Serious Tool for Developers

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GLM-4.5: Architecture & Reasoning

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