GLM-4.5-Air is the lightweight version of our newest flagship model family, designed specifically for agent-focused applications. Like GLM-4.5, it uses a Mixture-of-Experts (MoE) architecture, but with a smaller parameter footprint. GLM-4.5-Air also supports hybrid inference modes, including a "thinking mode" for deeper reasoning and tool usage, and a "non-thinking mode" for real-time interactions.
Retired on Jun 18, 2026: requests to this model ID now return an error. These models are live and work with the same API key.
GLM-4.5-Air is the lightweight version of our newest flagship model family, designed specifically for agent-focused applications. Like GLM-4.5, it uses a Mixture-of-Experts (MoE) architecture, but with a smaller parameter footprint.
No. GLM 4.5 Air (free) was retired on NagaAI on Jun 18, 2026, and requests to it now return an error. Live models you can use instead with the same API key: GLM-5.3-FlashX-Legal, GLM 5.3 Prime and LFM3-1.7B.
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