Availability
Available 12 of 12 tracked days. Daily snapshots show whether this model was accessible as a free model on OpenRouter.
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| Model | Days | 29 | 30 | 31 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| Z.ai: GLM 4.5 Air (free) | 0 | ||||||||||||||||||||||||||||||
About
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter...
Specifications
Error Rate
Based on feedback reported by Free LLM Router users. Error rate reflects the percentage of requests that encountered issues such as rate limiting, unavailability, or errors. Learn more.
| Model | 1h | 6h | 24h | 7d | 30d |
|---|---|---|---|---|---|
| Z.ai: GLM 4.5 Air (free) | - | - | - | 100.0% | 100.0% |
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Frequently Asked Questions
Is Z.ai: GLM 4.5 Air (free) still free to use?
Z.ai: GLM 4.5 Air (free) is no longer available as a free model on OpenRouter.
What is the context window for Z.ai: GLM 4.5 Air (free)?
Z.ai: GLM 4.5 Air (free) supports a context window of 131K tokens (131,072 tokens).
What is the maximum output length for Z.ai: GLM 4.5 Air (free)?
Z.ai: GLM 4.5 Air (free) can generate up to 96K tokens (96,000 tokens) per response.
Does Z.ai: GLM 4.5 Air (free) support function calling (tools)?
Yes, Z.ai: GLM 4.5 Air (free) supports function calling / tool use, enabling it to interact with external APIs and services.
Does Z.ai: GLM 4.5 Air (free) support reasoning?
Yes, Z.ai: GLM 4.5 Air (free) supports reasoning capabilities, allowing it to show its step-by-step thought process.