GLM 4.5 Air
$0.13 per 1M input tokens and $0.85 per 1M output tokens · 131K context · tools, reasoning, open weights.
Prices checked Oct 21, 2026 · tracked by LLM Cost Index since Oct 21, 2026
What GLM 4.5 Air costs per month
Estimated monthly bill for typical workloads, using the cached-input price for repeated context. Try your own numbers in the cost calculator.
| Workload | Per month |
|---|---|
| Customer chatbot 1,000 conversations a day, 8 turns each | $95.52 |
| Document Q&A (RAG) 500 questions a day over retrieved documents | $17.13 |
| Coding / tool-using agent 200 tasks a day, long tool-heavy contexts | $38.85 |
| Content generation 30 long articles a day | $2.26 |
| Classification / extraction 100,000 short items a day | $155 |
Price history
We started tracking GLM 4.5 Air on Oct 21, 2026; the chart appears as soon as there is a second data point. See all recent price changes.
Where to run GLM 4.5 Air: 3 providers
Novita is the cheapest at $0.13 input / $0.85 output per 1M tokens. Uptime is the average over the last 30 days as reported by OpenRouter; see provider reliability.
| Provider | Input / 1M | Output / 1M | Context | Uptime | Notes |
|---|---|---|---|---|---|
| Novita | $0.13 | $0.85 | 131K | 100% | bf16 |
| SiliconFlow | $0.14 | $0.86 | 131K | 100% | fp8 |
| Z.AI | $0.20 | $1.10 | 131K | 99.8% | fp8 |
Cheaper alternatives to GLM 4.5 Air
Models with the same tool calling for at least 20% less (3:1 input/output mix), most capable first.
| Model | Input / 1M | Output / 1M | Context | Capabilities |
|---|---|---|---|---|
| Claude Haiku 5.5 Anthropic | $0.10 | $0.50 | 1M | visiontoolsreasoningJSON |
| GLM 5.3 Flash Z.ai | $0.041 | $0.12 | 1.05M | visiontoolsreasoningJSONopen weights |
| Ling 3.1 Flash inclusionAI | $0.075 | $0.225 | 262K | toolsreasoningJSON |
| GPT-6 Luna OpenAI | $0.10 | $0.50 | 1.05M | visiontoolsreasoningJSON |
| MiMo-V2.6-Flash Xiaomi | $0.14 | $0.28 | 1.05M | visionaudiotoolsreasoningJSONopen weights |
How to pay less for GLM 4.5 Air
For a customer chatbot (1,000 conversations a day, 8 turns each) that costs $118 a month at list price without caching:
| Option | Per month | You save |
|---|---|---|
| Move to Claude Haiku 5.5 (similar capabilities) | $58.56 | $59.64 (50%) |
| Use prompt caching (60% of input cached) | $95.52 | $22.68 (19%) |
Other workloads: cut-your-bill tool for GLM 4.5 Air.
Specifications
| Model ID | z-ai/glm-4.5-air |
| Input | text |
| Output | text |
| Tool calling | Yes |
| Structured output | No |
| Reasoning mode | Yes |
| Open weights | Yes — zai-org/GLM-4.5-Air |
| Knowledge cutoff | 2024-12-31 |
| Released | Jul 25, 2025 |
FAQ
- How much does GLM 4.5 Air cost?
- $0.13 per million input tokens and $0.85 per million output tokens; cached input costs $0.025 per million. Prices as of Oct 21, 2026.
- What is the context window of GLM 4.5 Air?
- 131K tokens, with up to 98K output tokens per response.
- Does GLM 4.5 Air support images, tools and structured output?
- Images as input: no. Tool calling: yes. Structured (JSON) output: no. Reasoning mode: yes.
- What are cheaper alternatives to GLM 4.5 Air?
- Models with the same key capabilities for at least 20% less include Claude Haiku 5.5 ($0.10 / $0.50), GLM 5.3 Flash ($0.041 / $0.12), Ling 3.1 Flash ($0.075 / $0.225).
More from Z.ai: all Z.ai models · how we collect prices