B.AI Launches the Zhipu GLM-5.3-Flash Model with Free API Access

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B.AI, a one-stop AGI infrastructure platform, launched Zhipu GLM-5.3-Flash (320B-A18B) on August 27, 2026, with free API access available through the official API group. The model, the first native multimodal in the GLM-5 series, features 320 billion total parameters and 18 billion active parameters, built on domestic AI chips. It employs a hybrid sparse and linear attention architecture and supports a 1 million token ultra-long context. Developers can now access it free of charge to handle complex reasoning, long-form text, and multimodal tasks. This AI + crypto news update highlights on-chain developments in the AI infrastructure space.

ChainCatcher report: On August 27, the all-in-one AGI infrastructure platform B.AI announced that Zhipu’s GLM-5.3-Flash (320B-A18B) has officially launched on the platform and is now fully available for free via the official B.AI API group. As the first natively multimodal model in the GLM-5 series, GLM-5.3-Flash features 320 billion total parameters and 18 billion activated parameters, powered entirely by domestically developed AI chips. It introduces a novel hybrid sparse and linear attention architecture for the first time, combined with a 1M token context length, delivering exceptional performance and unmatched cost-efficiency. Starting today, developers can access GLM-5.3-Flash at no cost through the B.AI API group to effortlessly handle complex reasoning, long-form text processing, and multimodal tasks.

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