Gemini 3.1 Pro Preview Custom Tools alternatives
The closest alternative to Gemini 3.1 Pro Preview Custom Tools is Gemini 3.6 Flash — comparable intelligence (50.1 vs —); for a cheaper option, GPT-5.6 Terra runs $1.00/M vs $2.00/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
Open-source alternatives
Frequently asked
What is the best alternative to Gemini 3.1 Pro Preview Custom Tools?
Gemini 3.6 Flash is the closest alternative to Gemini 3.1 Pro Preview Custom Tools, with an Intelligence Index of 50.1 (Gemini 3.1 Pro Preview Custom Tools scores —) at $1.50 per million input tokens.
Is there a cheaper alternative to Gemini 3.1 Pro Preview Custom Tools?
Yes — GPT-5.6 Terra costs $1.00 per million input tokens versus $2.00 for Gemini 3.1 Pro Preview Custom Tools, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to Gemini 3.1 Pro Preview Custom Tools?
Kimi K3 is the strongest open-weight alternative to Gemini 3.1 Pro Preview Custom Tools — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.