The closest alternative to GPT-4o (2024-08-06) is Mistral Small 4 — comparable intelligence (18.6 vs 18.6); for a cheaper option, Qwen3.7 Max runs $1.25/M vs $2.50/M; for more speed, gpt-oss-120b (free) hits 554 t/s; and the best open-weight substitute is MiniMax M3.
Mistral Small 4 is the closest alternative to GPT-4o (2024-08-06), with an Intelligence Index of 18.6 (GPT-4o (2024-08-06) scores 18.6) at $0.150 per million input tokens.
Yes — Qwen3.7 Max costs $1.25 per million input tokens versus $2.50 for GPT-4o (2024-08-06), while staying within ~8 points of its Intelligence Index.
MiniMax M3 is the strongest open-weight alternative to GPT-4o (2024-08-06) — downloadable from Hugging Face and self-hostable, scoring 54.7 on intelligence.