All three EDA incumbents shipped long-running autonomous agents in the same week, on the same NVIDIA substrate.

At DAC 2026, Synopsys unveiled a fully autonomous design verification agent claiming up to 50x faster time-to-validated RTL with 20% additional coverage; Cadence introduced AuraStack AI Super Agent; Siemens added self-verifying agents to Fuse. All three run on NVIDIA's Agent Toolkit, which NVIDIA expanded July 26-27 with PhysicsNeMo and CUDA-X as agent-callable skills. The pattern worth stealing: in a vertical where incumbents own irreplaceable domain data, the shared agent runtime commoditized to a chip vendor while the three rivals differentiated on autonomy depth, not on the model.