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Gemini 3.1 Pro Preview Custom Tools Pricing

Google · google-gemini-3-1-pro-preview-customtools

Input / 1M tokens

$2.00

Output / 1M tokens

$12.00

Context window

1,048,756 tokens

≈ 1,398 pages of text

Max output

65,536 tokens

What it costs in practice

Typical request (1,200 in + 400 out tokens)$0.0072

1,000 requests / month$7.20/mo 10,000 requests / month$72.00/mo 100,000 requests / month$720.00/mo

Estimate your own workloadOpens the calculator with Gemini 3.1 Pro Preview Custom Tools preloaded — adjust volume and token counts there.

Price history

Only one price point recorded so far.

The staircase chart appears once a price change is detected.

Pricing and specs for this model are auto-synced from OpenRouter, but it isn't one of our editorial picks yet — no “what it excels at” write-up or business tradeoff notes. Any tier badge above is estimated from price.

Cheaper from Google

Gemini 2.5 ProGoogle$0.0055/ typical request Gemini 3.5 FlashGoogle$0.0054/ typical request Gemini 3.1 Flash LiteGoogle$0.0009/ typical request

Same tier from other providers

Claude Fable 5Anthropic$0.032/ typical request GPT Chat LatestOpenAI$0.018/ typical request Grok 4.3xAI$0.0025/ typical request

Head-to-head

Gemini 3.1 Pro Preview Custom Tools vs Claude Fable 5 →Gemini 3.1 Pro Preview Custom Tools vs GPT Chat Latest →Gemini 3.1 Pro Preview Custom Tools vs Grok 4.3 →

Vendor list rates, as of Jun 15, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.