# S4 vs Mamba vs RWKV — what's the difference? | Rudrite Research

> Source: <https://research.rudrite.com/compare/s4-vs-mamba-vs-rwkv>
> Published: 2026-06-14 00:00:00+00:00

# S4 vs Mamba vs RWKV

The post-Transformer sequence lineage — a structured state space, a selective one, and a linear-attention RNN, all chasing linear cost without losing quality.

A clear, side-by-side comparison with examples — part of Rudrite Research.