All LLM prices / Google

gemini-3-pro-image-preview price per 1M tokens

gemini-3-pro-image-preview costs $2.00 per 1M input tokens and $12.00 per 1M output tokens, and $0.20 per 1M cached input tokens read.

Per 1M tokens	Input	Output	Cache read	Cache write
gemini-3-pro-image-preview	$2.00	$12.00	$0.20	—

What a call costs

A typical agent step of 20,000 input and 1,500 output tokens costs $0.058 on gemini-3-pro-image-preview, so 10,000 of them a month is $580.00. Serving the repeated part of the prompt from cache cuts the input side to $0.20 per 1M.

gemini-3-pro-image-preview on other providers

Listed as	Input	Output	Cache read	Cache write
gemini/gemini-3-pro-image-preview	$2.00	$12.00	—	—
openrouter/google/gemini-3-pro-image-preview	$2.00	$12.00	$0.20	$0.375
vertex_ai/gemini-3-pro-image-preview	$2.00	$12.00	$0.20	—

Price history

2026-10-04 listed rate changed: cache read — → $0.20

Price a call with the free API

No key, no account. It uses this same table, and with "usage_shape": "openai" it takes the cached tokens out of prompt_tokens first, so they aren't billed twice.

curl -s https://api.aight.studio/api/cost \
  -H 'content-type: application/json' \
  -d '{"model": "gemini-3-pro-image-preview", "input_tokens": 20000, "output_tokens": 1500, "cache_read_tokens": 12000}'

Returns cost_usd, a breakdown per token type, the rates per 1M, and when the table last changed. Rates only: GET https://api.aight.studio/api/pricing?models=a,b. Rate-limited per client; an unknown model is a 404, never $0. Full API docs.

Which line of your agent spends it? AIght traces each gemini-3-pro-image-preview call to the line of code that made it. For coding agents, pip install aight && aight-collect --report prices your Claude Code, Codex or Gemini CLI history locally with no account.