Inception’s Mercury 3 Undercuts the Speed-Optimized Frontier at 1,068 Tokens per Second

At 1,068 tokens per second on NVIDIA GPUs, Inception Labs’ Mercury 3, released October 19, 2026, establishes a new performance baseline that renders the existing fast-cheap tier of frontier models obsolete. By utilizing a diffusion-based architecture, the model generates tokens in parallel through a denoising process rather than the sequential autoregressive methods used by incumbents. This architectural shift allows Inception Labs to report speeds 4-8x faster than comparable frontier models, though these performance metrics and benchmark results – including claims that it outperforms GPT-6 Luna and Claude Haiku 5.5 – remain vendor-reported.

Source: Forkast