B.AI said yesterday that its free model lineup is now fully in place, giving users no-threshold access to six major models: GLM-5.3-Flash, DeepSeek-V4-Flash, DeepSeek-V4-Flash-Vision-Exp, Hy3 from Tencent Hunyuan, MiMo-V2.5 from Xiaomi, and Qwen3.8-Flash. According to the platform, all six models are available for free.
The newly introduced GLM-5.3-Flash is the model previously known for drawing broad attention as “Ox Alpha.” B.AI described it as the first natively multimodal model in the GLM-5 series. It carries 320B total parameters and 18B active parameters, uses a hybrid sparse and linear-attention architecture, and supports a 1M-token context window.
B.AI said the free lineup covers a range of use cases, including text-only tasks, multimodal applications, code generation, and Agent orchestration. The platform added that both developers and heavy AI users can access advanced large-model capabilities at zero cost through B.AI, with access available via chat.b.ai/chat.
ChainCatcher reported that B.AI said yesterday its free model lineup is now fully ready, covering six models: GLM-5.3-Flash, DeepSeek-V4-Flash, DeepSeek-V4-Flash-Vision-Exp, Hy3 from Tencent Hunyuan, MiMo-V2.5 from Xiaomi, and Qwen3.8-Flash. The platform said all of them are open to users free of charge with no access barrier.
Among them, GLM-5.3-Flash made its debut as the model previously known for drawing wide attention as “Ox Alpha.” B.AI described it as the first natively multimodal model in the GLM-5 series. It has 320B total parameters and 18B active parameters, uses a hybrid architecture that combines sparse attention with linear attention, and supports a 1M context window.
B.AI said the lineup is designed for a range of scenarios including text-only tasks, multimodal use, code generation, and Agent orchestration. According to the platform, both developers and advanced AI users can call frontier large-model capabilities at zero cost through B.AI by logging in at chat.b.ai/chat.
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