Z.ai launches GLM-5.3-Flash AI model with 320B parameters, 18B active; outperforms GLM-5.2 at one-tenth the cost using hybrid sparse-linear attention architecture on Chinese chips.

GLM-5.3-Flash: Frontier Intelligence, Flash Cost

We introduce GLM-5.3-Flash, the first natively multimodal model in the GLM-5 series. With 320B total parameters and just 18B active parameters, it outperforms GLM-5.2 across benchmarks and real-world workloads at one-tenth the price, while approaching Claude Opus 4.8 on coding and agentic benchmarks. GLM-5.3-Flash incorporates several architectural improvements over GLM-5. For the first time, we introduce a hybrid architecture combining sparse and linear attention, sharply reducing long-context ...