The Eleventh NTIRE 2026 Efficient Super-Resolution Challenge Report. - Bin Ren 005; Hang Guo 002; Yan Shu; Jiaqi Ma; Ziteng Cui; Shuhong Liu; Guofeng Mei; Lei Sun 016; Zongwei Wu; Fahad Shahbaz Khan; Salman Khan 001; Radu Timofte; et al. (CoRR, 2026)