The closest alternative to KAT-Coder-Pro V2 is Qwen3.5 397B A17B — comparable intelligence (33.7 vs 33.7); for a cheaper option, GPT-5.6 Luna runs $0.100/M vs $0.300/M; and the best open-weight substitute is Kimi K3.
Qwen3.5 397B A17B is the closest alternative to KAT-Coder-Pro V2, with an Intelligence Index of 33.7 (KAT-Coder-Pro V2 scores 33.7) at $0.390 per million input tokens.
Yes — GPT-5.6 Luna costs $0.100 per million input tokens versus $0.300 for KAT-Coder-Pro V2, while staying within ~8 points of its Intelligence Index.
Kimi K3 is the strongest open-weight alternative to KAT-Coder-Pro V2 — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.