GLM 4.5 Air is Z.ai's lightweight inference variant of the GLM 4.5 foundation model, maintaining a 131K-token context window with optimizations for faster response times.
- Strengths
- GLM 4.5 Air delivers faster inference while preserving broad capabilities across text understanding, reasoning, and generation tasks.
- Best for
- Applications that prioritize low-latency responses and throughput over maximum model capability, such as real-time chat, summarization, and general-purpose text tasks.
- Limitations
- As an optimized inference variant of an earlier foundation model, it trades some reasoning depth and capability for speed compared to newer foundation models in the Z.ai lineup.
Input / 1M
$0.13
Output / 1M
$0.85
Cached input / 1M
$0.025
Context window
131K
Price history
Input (solid)Output (dashed)
Price change
- 30d
- in — out —
- 90d
- in increased 4.0% out decreased 0.0%
- 1y
- in increased 4.0% out decreased 0.0%
- Since launch
- in increased 4.0% out decreased 0.0%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 17 Jun 2026 | $0.13 | $0.85 | $0.025 | Imported from OpenRouter | openrouter.ai |
| 11 Jun 2026 | $0.125 | $0.85 | $0.06 | Imported from OpenRouter | openrouter.ai |