Gemini 3.1 Flash Image Preview - Inconsistent Pricing Between AI Studio and API Docs

Gemini API
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1

I’ve noticed a significant pricing discrepancy for the gemini-3.1-flash-image-previewmodel between different official sources.

Current Situation:

Source Input (per 1M tokens) Text Output (per 1M tokens) Image Output (per 1M tokens)
AI Studio $0.50 $3.00 $60.00
API Documentation $0.25 $1.50 $60.00

Links:

AI Studio: https://aistudio.google.com/

API Docs: https://ai.google.dev/gemini-api/docs/pricing

Which pricing is correct and should be used for billing?

This is causing confusion for developers trying to estimate costs accurately. An official clarification would be greatly appreciated.

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2

Same here, I’m using the Gemini 3.1 Flash preview, and it’s charging 3–4× more than expected. This is significantly affecting the budgeting for my project.

3

Wondering the same and also if they are even reading this forum?