The closest alternative to Claude 3 Haiku is Granite 4.1 8B — comparable intelligence (12.4 vs 12.3); for a cheaper option, MiMo-V2.5 runs $0.140/M vs $0.250/M; for more speed, gpt-oss-120b (free) hits 554 t/s; and the best open-weight substitute is MiniMax M3.
Granite 4.1 8B is the closest alternative to Claude 3 Haiku, with an Intelligence Index of 12.4 (Claude 3 Haiku scores 12.3) at $0.050 per million input tokens.
Yes — MiMo-V2.5 costs $0.140 per million input tokens versus $0.250 for Claude 3 Haiku, while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to Claude 3 Haiku — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.