Z.ai: GLM 4.5 Air

GLM models from Z.AI / BigModel are commonly positioned for general language understanding, reasoning and agent-style application development. This GLM 4.5 Air entry is listed as a free external resource with agent/reasoning tags and a long context metadata value. Since the provider page is a JavaScript-heavy platform, verify the current model card, API access, region availability, license, data policy and quota limits directly in the Z.AI console or documentation.