The closest alternative to Hy3 preview is MiniMax M2.5 — comparable intelligence (41.9 vs 41.9); for a cheaper option, Nemotron 3 Ultra (free) runs Free/M vs $0.063/M; for more speed, GLM 4.7 hits 427 t/s; and the best open-weight substitute is MiniMax M3.
MiniMax M2.5 is the closest alternative to Hy3 preview, with an Intelligence Index of 41.9 (Hy3 preview scores 41.9) at $0.150 per million input tokens.
Yes — Nemotron 3 Ultra (free) costs Free per million input tokens versus $0.063 for Hy3 preview, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to Hy3 preview — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.