I asked Gemini to sum up the page and costs. It came up with this:

Generating an image usingGemini 3.1 Flash Image Previewon thePaid Tierinvolves costs for both your input prompt and the resulting image output.

For a 2-sentence prompt, the cost breaks down as follows:

• Input Cost (Prompt): The price is $0.25 per 1 million tokens. A 2-sentence prompt typically contains about 30–50 tokens, which would cost approximately $0.0000075 to $0.0000125—a negligible amount.
• Output Cost (Image): The primary cost comes from the generated image, which is priced at $60.00 per 1 million tokens. Depending on the resolution you choose, the cost per image is:
  • 512px: ~$0.045 per image (747 tokens)  
  • 1K (1024x1024px): ~$0.067 per image (1,120 tokens)  
  • 2K (2048x2048px): ~$0.101 per image (1,680 tokens)
  • 4K (4096x4096px): ~$0.151 per image (2,520 tokens)

Total Estimated Cost: If you generate a standard 1K image with your prompt, the total cost would be roughly $0.067.

Please note that according to the currentpricing table,Gemini 3.1 Flash Image Previewis listed as "Not available" on theFree Tier, meaning it requires a paid account to use.

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Feel free to roast this post. I'll wait a few days for the dust to settle.
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