The closest alternative to DeepSeek V4 Pro is Mistral Medium 3.5 — comparable intelligence (39.2 vs 39.3); for a cheaper option, MiniMax M3 runs $0.300/M vs $0.435/M; for more speed, gpt-oss-120b (free) hits 554 t/s; and the best open-weight substitute is MiniMax M3.
Mistral Medium 3.5 is the closest alternative to DeepSeek V4 Pro, with an Intelligence Index of 39.2 (DeepSeek V4 Pro scores 39.3) at $1.50 per million input tokens.
Yes — MiniMax M3 costs $0.300 per million input tokens versus $0.435 for DeepSeek V4 Pro, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to DeepSeek V4 Pro — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.