The closest alternative to Seed 1.6 Flash is Seed-2.0-Lite — comparable intelligence (— vs —); for a cheaper option, Nemotron 3 Ultra (free) runs Free/M vs $0.075/M; for more speed, Morph V3 Large hits 3.1k t/s; and the best open-weight substitute is MiniMax M3.
Seed-2.0-Lite is the closest alternative to Seed 1.6 Flash, with an Intelligence Index of — (Seed 1.6 Flash scores —) at $0.250 per million input tokens.
Yes — Nemotron 3 Ultra (free) costs Free per million input tokens versus $0.075 for Seed 1.6 Flash, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to Seed 1.6 Flash — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.