AI Model Atlas / Z.ai
GLM 4.5 Air
One million input tokens cost $0.20 and one million output tokens $1.10. Context window: 131k tokens, about 218 A4 pages.
What it costs in practice
Pricing per million tokens doesn't mean anything to anyone, so I convert it to three tasks that people actually give to models. The usage assumptions are listed for each row so you can verify them.
| Task | Input | Output | Cost |
|---|---|---|---|
| 1500-word articlebrief plus finished text in English | 1,500 tokens | 2,200 tokens | $0.0027 |
| 100 chat queries700 tokens per question and 400 per answer | 70,000 tokens | 40,000 tokens | $0.06 |
| Hour of work with an agentagent reads repository and writes fixes | 250,000 tokens | 30,000 tokens | $0.08 |
Technical details
| Provider | Z.ai |
| Modalities | text → text |
| Context window | 131k tokens (~218 A4 pages) |
| Maximum response | 98k tokens |
| Step-by-step reasoning | yes |
| Tool calling | yes |
| Forced JSON format | no |
| Knowledge cutoff | 2024-12-31 |
| Cache read | $0.030 per million |
| Content moderation | no extra filter |
How it compares to the rest
The database contains 469 models. In terms of input pricing GLM 4.5 Air is more expensive than 30 percent of paid models. A longer context window is available in 363 models.
Input price history
2026-09-08 · $0.132026-11-11 · $0.20
The chart shows the price of a million input tokens on consecutive measurement days. History starts on the day I launched the atlas and grows with each day. I don't backfill data.
Alternatives at a similar price
Models from other providers whose cost for the same article comes out closest.
| Model | Input / M | Output / M | 1500-word article | Context |
|---|---|---|---|---|
| Llama 4 MaverickMeta | $0.35 | $1.00 | $0.0027 | 524k |
| Qwen3.6 FlashQwen (Alibaba) | $0.19 | $1.13 | $0.0028 | 1M |
| Morph V3 Large (batch)Morph | $0.45 | $0.95 | $0.0028 | 262k |
| Llama 3.1 70B InstructMeta | $0.72 | $0.72 | $0.0027 | 131k |
Compare GLM 4.5 Air with another model or go back to the full database 469 models.