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LightweightZhipu
GLM-4.5 Air
GLM-4.5 Air is Zhipu's lightweight text model with a 128K token context window, optimized for speed with 82.55 tokens/second output.
Context 128K
Tier Lightweight
Tools Supported
Input from
$0.130 / 1M tokens
across 4 providers
API Pricing
Cheapest on Novita AI — 16% below avg| Provider | Input / 1M | Output / 1M | Cached / 1M |
|---|---|---|---|
| $0.130 | $0.850 | $0.025 | |
| $0.130 | $0.850 | $0.025 | |
| $0.157 | $0.937 | $0.078 | |
| $0.200 | $1.10 | - |
Prices updated daily. Last check: Sep 8, 2026
GLM-4.5 Air pricing by provider
Input, output, and batch rates, plus alternatives, for one provider at a time.
Performance & Benchmarks
Source: Artificial Analysis →Intelligence
10.5 / 100
Math
80.7 / 100
Reasoning & Knowledge
- MMLU-Pro81.5%
- GPQA Diamond73.3%
- Humanity's Last Exam7.0%
Coding
- LiveCodeBench68.4%
Math
- AIME 202580.7%
- AIME67.3%
- MATH-50096.5%
Agentic & Tool Use
- Terminal-Bench Hard20.5%
- τ²-bench46.5%
Instruction & Long Context
- IFBench37.6%
- Long-Context Reasoning46.7%
Benchmarks measured Sep 2026. Scores are independent evaluations, not vendor-reported.
Model Details
General
- Creator
- Zhipu
- Family
- GLM
- Tier
- Lightweight
- Context Window
- 128K
- Modalities
- Text
Capabilities
- Tool Calling
- Yes
- Open Source
- No
- Subtypes
- Chat Completion
- Aliases
- glm-4-5v
Strengths & Limitations
Strengths
- Fast output generation at 82.55 tokens per second
- 128K token context window for processing long documents
- Tool calling support with structured interactions
- Quick response initiation with 644ms time to first token
- Lightweight architecture optimized for efficiency
- Part of established GLM model family ecosystem
Limitations
- No image or multimodal input support
- Proprietary model with no open source availability
- Lightweight tier may limit complex reasoning capabilities
- Smaller context window compared to some flagship models
- Limited to text-only chat completion tasks
Key Features
•128K token context window
•Tool calling functionality
•Chat completion API
•Text-only input and output
•High-speed token generation
•Structured response formatting
•API-based deployment model
About GLM-4.5 Air
GLM-4.5 Air is a lightweight text model developed by Zhipu as part of their GLM model family. Positioned as an efficient option within the GLM lineup, this model prioritizes speed and responsiveness for applications requiring quick text generation and processing.
The model operates with a 128,000 token context window and supports tool calling functionality. Performance benchmarks show an output speed of 82.55 tokens per second with a time to first token of 644 milliseconds. GLM-4.5 Air focuses exclusively on text-based interactions through chat completion capabilities, without multimodal support for images or other input types.
As a lightweight model, GLM-4.5 Air targets use cases where response speed and efficiency are prioritized over maximum capability. It competes in the tier of models designed for high-throughput applications rather than complex reasoning tasks that would typically require larger, more capable models.
Common Use Cases
GLM-4.5 Air is designed for applications requiring fast, efficient text processing where response speed is crucial. Its lightweight architecture makes it suitable for high-volume chat applications, customer service automation, content generation workflows, and real-time text analysis tasks. The 128K context window enables document summarization and analysis, while tool calling support allows integration with external systems and APIs. Organizations prioritizing cost efficiency and speed over maximum model capability will find GLM-4.5 Air appropriate for production deployments requiring consistent, quick responses rather than complex reasoning or creative tasks.
Frequently Asked Questions
How much does GLM-4.5 Air cost per million tokens?
GLM-4.5 Air pricing varies by provider and pricing type (standard vs batch). Check the pricing table above for current rates across all providers.
What is GLM-4.5 Air best used for?
GLM-4.5 Air excels at high-volume text processing tasks requiring fast response times, such as customer service automation, content generation, and real-time chat applications. Its 128K context window and tool calling capabilities make it suitable for document analysis and API integration workflows where efficiency is prioritized over complex reasoning.
How fast is GLM-4.5 Air compared to other lightweight models?
GLM-4.5 Air generates output at 82.55 tokens per second with a 644ms time to first token. This positions it as a speed-optimized option within the lightweight model category, though specific comparisons depend on the particular models and providers being evaluated.