Z AI has launched a newer model, GLM-4.7-Flash, we suggest considering this model instead.
For more information, see Comparison of GLM-4.7-Flash to other models and API provider benchmarks for GLM-4.7-Flash.
GLM-4.5-Air Intelligence, Performance & Price Analysis
Model summary
Intelligence
Artificial Analysis Intelligence Index
Speed
Output tokens per second
Input Price
USD per 1M tokens
Output Price
USD per 1M tokens
Verbosity
Output tokens from Intelligence Index
Metrics are compared against models of the same class:
- Non-reasoning models → compared only with other non-reasoning models
- Reasoning models → compared across both reasoning and non-reasoning
- Open weights models → compared only with other open weights models of the same size class:
- Tiny: ≤4B parameters
- Small: 4B–40B parameters
- Medium: 40B–150B parameters
- Large: >150B parameters
- Proprietary models → compared across proprietary and open weights models of the same price range, using a blended 3:1 input/output price ratio:
- <$0.15 per 1M tokens
- $0.15–$1 per 1M tokens
- >$1 per 1M tokens
| Reasoning | Yes This page shows the reasoning version of this model. A non-reasoning variant may also exist. |
|---|---|
| Input modality | Supports: text |
| Output modality | Supports: text |
| Context window | 128k ~192 A4 pages of size 12 Arial font |
| Total parameters | 106B |
| Active parameters | 12B Number of parameters active per token during inference |
| License | MIT |
| Model weights | Hugging Face |
GLM-4.5-Air is amongst the leading models in intelligence, but somewhat expensive when comparing to other open weight models of similar size. It's also faster than average, however very verbose. The model supports text input, outputs text, and has a 128k tokens context window.
GLM-4.5-Air scores 23 on the Artificial Analysis Intelligence Index, placing it well above average among comparable models (averaging 15). When evaluating the Intelligence Index, it generated 68M tokens, which is very verbose in comparison to the average of 7.3M.
Pricing for GLM-4.5-Air is $0.20 per 1M input tokens (somewhat expensive, average: $0.17) and $1.10 per 1M output tokens (somewhat expensive, average: $0.57). In total, it cost $106.26 to evaluate GLM-4.5-Air on the Intelligence Index.
At 119 tokens per second, GLM-4.5-Air is faster than average (77).
Intelligence
Artificial Analysis Intelligence Index
Artificial Analysis Intelligence Index by Open Weights / Proprietary
Intelligence Evaluations
Openness
Artificial Analysis Openness Index: Results
Intelligence Index Comparisons
Intelligence vs. Price
Intelligence Index Token Use & Cost
Output Tokens Used to Run Artificial Analysis Intelligence Index
Cost to Run Artificial Analysis Intelligence Index
Context Window
Context Window
Pricing
Pricing: Input and Output Prices
Intelligence vs. Price (Log Scale)
Pricing Comparison of GLM-4.5-Air API Providers
Speed
Measured by Output Speed (tokens per second)
Output Speed
Output Speed vs. Price
Latency
Measured by Time (seconds) to First Token
Latency: Time To First Answer Token
End-to-End Response Time
Seconds to output 500 Tokens, calculated based on time to first token, 'thinking' time for reasoning models, and output speed
End-to-End Response Time
Model Size (Open Weights Models Only)
Model Size: Total and Active Parameters
Comparisons to GLM-4.5-Air
- GLM-4.5-Air
gpt-oss-120B (high)- GPT-5.4 (xhigh)
- gpt-oss-20B (high)
- GPT-5.4 Pro (xhigh)
- GPT-5.2 (xhigh)
- GPT-5.3 Codex (xhigh)
Llama 4 Maverick
Gemini 3.1 Pro Preview- Gemini 3 Flash
- Gemini 3.1 Flash-Lite Preview
Claude 4.5 Haiku- Claude Sonnet 4.6 (max)
- Claude Opus 4.6 (max)
Mistral Large 3
DeepSeek V3.2
Grok 4.20 Beta 0309- Grok 4.1 Fast
Nova 2.0 Pro Preview (medium)
MiniMax-M2.5
NVIDIA Nemotron 3 Nano- NVIDIA Nemotron 3 Super
Kimi K2.5
K-EXAONE
MiMo-V2-Flash (Feb 2026)
K2 Think V2
Mi:dm K 2.5 Pro- GLM-5
Qwen3.5 397B A17B
Frequently Asked Questions
Common questions about GLM-4.5-Air
GLM-4.5-Air was released on July 28, 2025.
GLM-4.5-Air was created by Z AI.
GLM-4.5-Air scores 23 on the Artificial Analysis Intelligence Index, placing it well above average among other open weight models of similar size (median: 15).
GLM-4.5-Air generates output at 119.2 tokens per second (based on the median across providers serving the model), which is above average compared to other open weight models of similar size (median: 77.3 t/s).
GLM-4.5-Air has a time to first token (TTFT) of 1.19s (based on the median across providers serving the model), which is better than average compared to other open weight models of similar size (median: 1.52s).
GLM-4.5-Air costs $0.20 per 1M input tokens (better than average, median: $0.38) and $1.10 per 1M output tokens (somewhat higher than average, median: $0.85), based on the median across providers serving the model.
GLM-4.5-Air costs $0.20 per 1M input tokens and $1.10 per 1M output tokens (based on the median across providers serving the model). For a blended rate (3:1 input to output ratio), this is $0.42 per 1M tokens. Pricing may vary by provider. Compare provider pricing
When evaluated on the Intelligence Index, GLM-4.5-Air generated 68M output tokens, which is at the higher end compared to other open weight models of similar size (median: 7.3M).
Yes, GLM-4.5-Air is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
GLM-4.5-Air supports text input.
GLM-4.5-Air supports text output.
No, GLM-4.5-Air does not support image input. It can only process text.
No, GLM-4.5-Air is not multimodal. It only supports text input.
GLM-4.5-Air has a context window of 130k tokens. This determines how much text and conversation history the model can process in a single request.
Yes, GLM-4.5-Air is open weights. The model weights are publicly available and can be downloaded for self-hosting.
GLM-4.5-Air has 106 billion parameters (12 billion active).
GLM-4.5-Air is a Mixture of Experts (MoE) model with 106 billion total parameters, but only 12 billion active parameters are used during inference.
GLM-4.5-Air is released under the MIT license. This license allows commercial use. View license
GLM-4.5-Air achieves a score of 23 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, GLM-4.5-Air is available via API through 4 providers. Compare API providers
GLM-4.5-Air is available through 4 API providers. Compare providers