The closest alternative to o3 Mini High is Qwen3 235B A22B Instruct 2507 — comparable intelligence (25.0 vs 25.2); for a cheaper option, MiniMax M3 runs $0.300/M vs $1.10/M; for more speed, gpt-oss-120b (free) hits 554 t/s; and the best open-weight substitute is MiniMax M3.
Qwen3 235B A22B Instruct 2507 is the closest alternative to o3 Mini High, with an Intelligence Index of 25.0 (o3 Mini High scores 25.2) at $0.090 per million input tokens.
Yes — MiniMax M3 costs $0.300 per million input tokens versus $1.10 for o3 Mini High, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to o3 Mini High — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.