The closest alternative to Relace Apply 3 is Relace Search — comparable intelligence (— vs —); for a cheaper option, GPT-5.6 Luna runs $0.500/M vs $0.850/M; and the best open-weight substitute is Kimi K3.
Relace Search is the closest alternative to Relace Apply 3, with an Intelligence Index of — (Relace Apply 3 scores —) at $1.00 per million input tokens.
Yes — GPT-5.6 Luna costs $0.500 per million input tokens versus $0.850 for Relace Apply 3, while staying within ~8 points of its Intelligence Index.
Kimi K3 is the strongest open-weight alternative to Relace Apply 3 — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.