The Gemini API pricing page lists Gemini Decision (gemini-decision-1) at $0.10 per 1M input tokens on the paid tier, free of charge on the free tier, output not applicable (0 output tokens), and context caching not available. It says each request bills shared input tokens once regardless of question count, and that the Batch API isn't supported.

The exact words it rests on

Each request bills shared input tokens once, regardless of question count. Each question adds tokens for its own instructions, criteria, and formatting, and generates zero output tokens. [Batch API](/docs/batch-api) isn't supported. ... Input price (text, image, video, audio, PDF) * Free of charge * $0.10 --- * Output price * Not applicable (0 output tokens) * Not applicable (0 output tokens) --- * Context caching price * Not available * Not available

What the source said when we opened it, on 12 Nov 2026.

The source

Gemini Developer API pricing
Google · 2026-10-07

Open the sourcearchived copy

Checked

Checked by the notis newsroom on 12 Nov 2026, against the source above.

In the story

Google releases Gemini Decisions API, which returns probabilities for up to 1,000 questions 12 Nov 2026