Z.ai releases GLM-5.3-Flash, a 320B-A18B multimodal model

GLM-5.3-Flash is a 320B-A18B natively multimodal model with a 1M-token context window, released under the MIT License. It scores 57 on the Artificial Analysis Intelligence Index at $0.09 cost per task, with pricing at $0.15 per million input tokens and $0.50 output.