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Google: Gemini Pro Latest vs Google: Gemini 3.1 Pro Preview Custom Tools

Side-by-side comparison of specs, pricing, benchmark scores, and task rankings. Updated 2026-09-23.

Google: Gemini Pro Latest Google: Gemini 3.1 Pro Preview Custom Tools
Vendor~googlegoogle
Quality Score100100
Input Price$2.00/M$2.00/M
Output Price$12.00/M$12.00/M
Context Window1,048,5761,048,576
Max Output65,53665,536
Tool Calling✓✓
Structured Output✓✓
Reasoning Mode✓✓
Vision✓✓
Audio✓✓

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