The closest alternative to Trinity Large Thinking is DeepSeek V3.2 Exp — comparable intelligence (32.1 vs 31.9); for a cheaper option, MiMo-V2.5 runs $0.140/M vs $0.220/M; for more speed, gpt-oss-120b (free) hits 554 t/s; and the best open-weight substitute is MiniMax M3.
DeepSeek V3.2 Exp is the closest alternative to Trinity Large Thinking, with an Intelligence Index of 32.1 (Trinity Large Thinking scores 31.9) at $0.270 per million input tokens.
Yes — MiMo-V2.5 costs $0.140 per million input tokens versus $0.220 for Trinity Large Thinking, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to Trinity Large Thinking — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.