The closest alternative to Grok 4.3 is Qwen3.7 Plus — comparable intelligence (53.3 vs 53.2); for a cheaper option, MiniMax M3 runs $0.300/M vs $1.25/M; for more speed, MiniMax M2.7 hits 211 t/s; and the best open-weight substitute is MiniMax M3.
Qwen3.7 Plus is the closest alternative to Grok 4.3, with an Intelligence Index of 53.3 (Grok 4.3 scores 53.2) at $0.320 per million input tokens.
Yes — MiniMax M3 costs $0.300 per million input tokens versus $1.25 for Grok 4.3, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to Grok 4.3 — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.