Aion 3.5 Mini is the lower-cost version of AionLabs' Aion 3.5 storytelling system, built on smaller models from the GLM family and using the same collaborative multi-model generation. It targets the same niche, character roleplay and interactive fiction, with an emphasis on narrative structure, tension and conflict (including darker themes), at roughly a quarter of the price ($0.70 input / $1.40 output per million tokens on OpenRouter). It keeps the 262K-token context window and 32K output limit, is text-only, and has no open weights. It is a good fit for high-volume story or character apps; for general assistant work, pick a general-purpose model.