GLM-4.5 Air (Z AI)

GLM-4.5 Air is a text-to-text language model attributed to Z AI, designed as a lighter-tier variant within the broader GLM family. Third-party aggregator listings position it as an accessible alternative to heavier multimodal or reasoning-focused siblings, emphasizing a favorable balance between capability and operational cost. The model participates in independent leaderboard rankings alongside notable peers, indicating its relevance as a general-purpose conversational and reasoning engine rather than a narrow specialist.

In comparative evaluations against other Z AI offerings, GLM-4.5 Air is highlighted for delivering competitive reasoning scores at a notably lower input token price, with aggregator data reporting $0.17 per million input tokens and a blended value index that outpaces costlier variants. It also demonstrates faster token throughput than reasoning-heavy alternatives, making it well-suited for high-volume applications such as batch processing, agent pipelines, and developer-facing APIs where latency and budget matter more than maximum reasoning depth.