Cerebras

Cerebras builds the world's largest single processor, the Wafer-Scale Engine 3 (WSE-3), featuring 4 trillion transistors and 900,000 AI-optimized cores with 7,000x the memory bandwidth of NVIDIA's flagship HBM3e systems. The result is inference at 3,000+ tokens per second, roughly 20x faster than GPU-based providers. The CS-3 achieves 2,700+ tokens/second on GPT-OSS 120B compared to 900 tokens/second on NVIDIA's Blackwell B200. OpenAI announced a partnership to integrate up to 750 megawatts of Cerebras computing capacity into its inference stack, and AWS will bring the WSE-3 to Amazon Bedrock. The Cerebras Inference API is OpenAI-compatible, requiring just a few lines of code to migrate. For applications where raw inference speed is the primary constraint, Cerebras sets the absolute ceiling.