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Z.ai's GLM-4.5 launch post is dated 28 July 2025 (as cited by Wikipedia[2]), and the weights for both GLM-4.5 and GLM-4.5-Air were uploaded to Hugging Face[6] that day (04:44 UTC and 09:14 UTC). The repositories were created earlier, on 20 July, and Epoch AI lists 3 August and 20 July respectively, which are not the public release.Zhipu AI (Z.ai) releases GLM-4.5 (355B, 32B active) and GLM-4.5-Air (106B, 12B active), MIT-licensed hybrid-reasoning models for agents that rank third and sixth across 12 benchmarks, with API prices as low as $0.20 per million input tokens.
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