The closest alternative to MiMo-V2.5 is GPT-5.2-Codex — comparable intelligence (49.0 vs 49.0); for a cheaper option, Nemotron 3 Ultra (free) runs Free/M vs $0.140/M; for more speed, GLM 4.7 hits 427 t/s; and the best open-weight substitute is MiniMax M3.
GPT-5.2-Codex is the closest alternative to MiMo-V2.5, with an Intelligence Index of 49.0 (MiMo-V2.5 scores 49.0) at $1.75 per million input tokens.
Yes — Nemotron 3 Ultra (free) costs Free per million input tokens versus $0.140 for MiMo-V2.5, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to MiMo-V2.5 — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.