The closest alternative to GLM 4.5 is GPT-4.1 — comparable intelligence (26.3 vs 26.4); for a cheaper option, MiniMax M3 runs $0.300/M vs $0.600/M; for more speed, Mercury 2 hits 456 t/s; and the best open-weight substitute is MiniMax M3.
GPT-4.1 is the closest alternative to GLM 4.5, with an Intelligence Index of 26.3 (GLM 4.5 scores 26.4) at $2.00 per million input tokens.
Yes — MiniMax M3 costs $0.300 per million input tokens versus $0.600 for GLM 4.5, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to GLM 4.5 — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.