
Gemini 3.1 Pro Preview Free API — Complete Access Guide, Pricing, and Cost-Saving Tips (2026)
Gemini 3.1 Pro Preview can be tried for free in Google AI Studio but does not offer a free API tier. This guide covers every access method, real pricing data, benchmark comparisons with Claude Opus 4.6 and GPT-5.2, and strategies to reduce your API bill by 50% or more.





















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