Z.ai · 2025-07-25
GLM 4.5 Air pricing
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
Prices from OpenRouter’s models API, updated October 29, 2026
What GLM 4.5 Air costs a month
| Workload | Standard |
|---|---|
| Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out | $16.05 |
| Daily summaries: 10,000 a day, 3,000 tokens in, 300 out | $193 |
| Coding agent: 400 calls a day, 60,000 tokens in (80% cached), 2,000 out | $53.52 |
30 days. Cached input billed at the cache-read price. Use your own numbers.
Cheaper models with a similar context window
| Model | Provider | Input /1M | Output /1M | Cache read /1M | Context | Chatbot, per month* |
|---|---|---|---|---|---|---|
| Ling 3.0 Flash | inclusionai | $0.021 | $0.063 | $0.0042 | 262K | $1.70 |
| GLM 5.3 Flash | Z.ai | $0.046 | $0.074 | $0.03 | 1.05M | $2.95 |
| Qwen3.7 Flash | Alibaba Qwen | $0.03 | $0.13 | $0.006 | 1M | $2.91 |
| Mercury 2.5 | inception | $0.04 | $0.15 | $0.004 | 260K | $3.60 |
| Laguna XS 2.1 free variant | poolside | $0.06 | $0.12 | $0.03 | 262K | $4.14 |
* Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out, 30 days, no caching. Prices in US dollars per 1M tokens.
Cheaper isn’t automatically as good. Glow’s GlowBench scores models on your kind of task before suggesting a swap.
Other GLM models
| Model | Input /1M | Output /1M | Cache read /1M | Context | Chatbot, per month* |
|---|---|---|---|---|---|
| GLM 5.3 Prime | $2.80 | $8.80 | $0.56 | 1M | $232 |
| GLM 5.3 FlashX | $0.37 | $1.25 | $0.09 | 1.05M | $31.65 |
| GLM 5.3 Flash | $0.046 | $0.074 | $0.03 | 1.05M | $2.95 |
| GLM 5.3 | $0.07 | $1.40 | $0.069 | 1.05M | $19.95 |
| GLM 5.2 | $0.006 | $7 | $0.005 | 1.05M | $84.27 |
| GLM 5.1 | $1.40 | $4.40 | $0.26 | 205K | $116 |
* Support chatbot: 1,000 chats a day, 1,500 tokens in, 400 out, 30 days, no caching. Prices in US dollars per 1M tokens.
Related
GLM 4.5 Air: questions
How much does GLM 4.5 Air cost?
$0.13 per 1M input tokens and $0.85 per 1M output tokens, with cached input at $0.025. A 1,000-token prompt with a 500-token answer costs about $0.0006.
What is GLM 4.5 Air’s context window?
131,072 tokens, with up to 98,304 output tokens per response.
Is there a cheaper alternative to GLM 4.5 Air?
Ling 3.0 Flash costs $0.021 in and $0.063 out per 1M tokens with a similar context window. Whether it matches GLM 4.5 Air’s quality depends on the task: test it on your own prompts (Glow’s GlowBench does this per task).
Know what each model really costs you.
Connect OpenRouter and Glow shows spend by model, key and product, and flags the swap that saves the most at the same quality.
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