---
title: "Z.ai: GLM 4.5 Air — price, capability and what beats it · Undominated.ai"
canonical: https://undominated.ai/models/z-ai__glm-4.5-air/
description: "Z.ai: GLM 4.5 Air: $0.130/M in, $0.850/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper."
---

# Z.ai: GLM 4.5 Air — price, capability and what beats it · Undominated.ai

> Z.ai: GLM 4.5 Air: $0.130/M in, $0.850/M out. Independent capability scores, context-tier pricing, and the models that are both better and cheaper.

[Leaderboard](/) / Z.ai

# GLM 4.5 Air

Z.ai · released 2025-07-25

 $0.310 per million tokens, balanced Balanced Summarise Chat Code gen Agentic

## No independent quality score.

No benchmark we track has measured this model. That is not the same as measuring it and finding it wanting — we simply cannot rank it, so we do not.

### Every price dimension

| Input | $0.130 /M |
| --- | --- |
| Output | $0.850 /M |
| Cached input | $0.025 /M |

### Independent scores

| LMArena Elo | 1382.8 default |
| --- | --- |

Sources are listed separately rather than averaged. Across the 62 models both have scored they correlate at r = 0.806 — close agreement overall, but four models rank very differently between them, and a blended score would hide exactly those.

### Capability

| Context window | 131K |
| --- | --- |
| Max output | 98K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Knowledge cutoff | 2024-12-31 |

### Provenance

| Price source | openrouter.ai |
| --- | --- |
| Fetched | 2026-08-24 |
| Quality data | unrated |

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...