Is Gemini 3.1 Pro Preview Custom Tools or GPT-5 Mini cheaper?

GPT-5 Mini is cheaper on output tokens ($2.00 vs $18.00 per 1M).

Which has the larger context window, Gemini 3.1 Pro Preview Custom Tools or GPT-5 Mini?

Gemini 3.1 Pro Preview Custom Tools has the larger context window (1M tokens).

Gemini 3.1 Pro Preview Custom Tools vs GPT-5 Mini

GPT-5 Mini is cheaper on output tokens, while Gemini 3.1 Pro Preview Custom Tools offers a larger context window. Choose Gemini 3.1 Pro Preview Custom Tools or GPT-5 Mini based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Spec	Gemini 3.1 Pro Preview Custom Tools	GPT-5 Mini
Provider	OrcaRouter	OrcaRouter
Input / 1M tokens	$4.00	$0.25
Output / 1M tokens	$18.00	$2.00
Context window	1M	400K
Parameters	—	—
Open weights	No	No
Released	Feb 2026	Aug 2025

Gemini 3.1 Pro Preview Custom Tools details →GPT-5 Mini details →

FAQ

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.