The closest alternative to MiniMax M2 is Claude Opus 4.1 — comparable intelligence (28.2 vs 28.3); for a cheaper option, GPT-5.6 Luna runs $0.100/M vs $0.255/M; and the best open-weight substitute is Kimi K3.
Claude Opus 4.1 is the closest alternative to MiniMax M2, with an Intelligence Index of 28.2 (MiniMax M2 scores 28.3) at $15.00 per million input tokens.
Yes — GPT-5.6 Luna costs $0.100 per million input tokens versus $0.255 for MiniMax M2, while staying within ~8 points of its Intelligence Index.
Kimi K3 is the strongest open-weight alternative to MiniMax M2 — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.