Cerebras Serves GPT-5.6 Sol at 750 Tokens/Second

This post details how Cerebras WSE-3 hardware enables GPT-5.6 Sol to achieve up to 750 tokens/second by eliminating the GPU memory wall. The WSE-3 distributes 44 GB of SRAM directly beside its 900,000 cores, providing 21 petabytes per second of aggregate bandwidth. This allows model weights to stay close to compute, with only activations moving between CS-3 systems when a model is partitioned across multiple wafers. This architecture significantly reduces the synchronization overhead compared to conventional GPU clusters, leading to a 5.6x speedup on GDP-Val tasks and a 6.9x speedup on Humanity's Last Exam tasks.