GLM 4.5 Air
Fast and lightToolsZ.ai · Released July 2025 · Knowledge cutoff December 2024
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
It is part of Z.ai's GLM series, an open-weight line where the 5.x generation leads, Prime raises throughput, Flash and Turbo servings cut latency and cost, and 5V adds vision.
Facts and pricing
- Provider
- Z.ai
- Context window
- 131K tokens
- Input price
- 1.6 credits / 1M tokens ($0.13 raw)
- Output price
- 10.2 credits / 1M tokens ($0.85 raw)
- Vision (image input)
- No
- Tool calling
- Yes
- Extended reasoning
- No
Credits are what Zeplik bills: 1 credit = $0.10, computed from the raw provider rate with a 1.20x margin. Raw prices shown per 1M tokens.
Try GLM 4.5 Air now
What GLM 4.5 Air is best for
- High-volume everyday tasks where speed and cost matter: summaries, drafts, quick questions
- Tool use and agents: reliably calls functions, so it can search, run skills and drive workflows
Example prompts
Prompts that suit a fast and light model like GLM 4.5 Air:
- Summarize this article in five bullet points
- Rewrite this email to be shorter and friendlier
- Give me ten name ideas for a hiking newsletter
- Translate this paragraph to Spanish and keep the tone
Z.ai family
| Model | Context | Input cr/M | Output cr/M | Released |
|---|---|---|---|---|
| GLM 5.3 FlashX Legal | 1.0M | 4.4 | 15.0 | November 2026 |
| GLM 5.3 Prime | 1M | 33.6 | 106 | September 2026 |
| GLM 5.3 FlashX | 1.0M | 4.4 | 15.0 | September 2026 |
| GLM 5.3 Flash | 1.0M | 1.8 | 6.0 | August 2026 |
| GLM 5.3 Flash (batch) | 1.0M | 0.60 | 2.2 | August 2026 |
| GLM 5.3 (batch) | 1.0M | 5.4 | 24.0 | August 2026 |
| GLM 5.3 | 1.0M | 0.84 | 16.8 | August 2026 |
| GLM 5.2 | 1.0M | 0.072 | 81.6 | June 2026 |
| GLM 5.1 | 203K | 16.8 | 52.8 | April 2026 |
| GLM 5V Turbo | 203K | 14.4 | 48.0 | April 2026 |
Model comparisons
Frequently asked questions
- What is GLM 4.5 Air?
- GLM 4.5 Air is an AI model by Z.ai. GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
- How much does GLM 4.5 Air cost on Zeplik?
- Input tokens cost 1.6 credits per million and output tokens 10.2 credits per million (1 credit = $0.10; the raw provider rates are $0.13 and $0.85 per million). New accounts start with free credits.
- How long can a conversation with GLM 4.5 Air be?
- GLM 4.5 Air has a 131K-token context window (131,072 tokens), which covers the conversation plus any documents you attach.
- Does GLM 4.5 Air support images and tools?
- GLM 4.5 Air is text-only and supports tool calling.
Related models
GLM-5.3-FlashX-Legal (GLM-Legal) is Z.ai's legal-domain variant of GLM-5.3-FlashX, a native multimodal model that accepts text, image, and video input and produces text.
GLM-5.3-Prime is the high-speed variant of Z.ai's GLM-5.3, inheriting its full capabilities while delivering 1.5–2× the output throughput through inference acceleration.
GLM-5.3-FlashX is the high-speed variant of Z.ai's GLM-5.3-Flash, a native multimodal model delivering inference speeds of up to 200 tokens/s.
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks.
GLM-5.3-Flash is a native multimodal model from Z.ai. It is suited for efficient coding and long-horizon agent tasks.
GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks.
More you can do with GLM 4.5 Air
- 468 AI skillsReady-to-run expert methods for writing, data, code and more, each running on GLM 4.5 Air or any model you pick.
- 997 integrationsConnect Gmail, Slack, GitHub, Notion and hundreds more so the assistant can work in your apps.
- Simple pricingPlus, Pro and Max plans with a monthly credit allowance that works across every model.