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Gemini 3.1 Pro Preview Custom Tools Pricing

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

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Input / 1M tokens

$2.00

Output / 1M tokens

$12.00

Context window

1,048,576 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.

What it excels at

Processes 1M-token contexts with vision and audio inputs. Supports custom tool definitions for structured workflows.

The business tradeoff

Output pricing at $12 per million tokens increases cost for long generations. Preview status implies potential instability and limited production guarantees.

Cheaper from Google

Gemini 3.1 Pro Preview (batch)Google$0.0036/ typical request Gemini 3.6 FlashGoogle$0.0048/ typical request Gemma 4 26B A4BGoogle$0.0002/ typical request

Same tier from other providers

Claude Fable 5Anthropic$0.032/ typical request Qwen3.7 PlusQwen$0.0009/ 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 Qwen3.7 Plus →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.