Google's new Decisions API answers yes, no or a score for $0.10 per million tokens, with no charge for output
On 11th Nov'26 Google launched the Gemini Decisions API in Google AI Studio, running a new model called Gemini Decision 1. It answers only three kinds of question: yes or no, multiple choice, or a rating on a scale you set, and it returns each answer with a confidence score instead of written text. A request can carry up to 256,000 tokens of text, images, audio or video. Google prices it at $0.10 per million input tokens with output free, puts end-to-end latency at 150 to 250 milliseconds for contexts up to 16,000 tokens, and says it is nearly five times cheaper than Gemini 3.5 Flash-Lite. OpenAI launched its own Decisions API in October.
What it actually means
A lot of what an agent spends on a general model goes on deciding rather than writing: which tool to call, whether a message breaks policy, which model to route to. Two of the big labs now sell a separate, cheaper model for exactly that, and it returns a confidence score you can set a threshold on, which a chat reply never gave you cleanly.
Look through your pipeline for calls where you parse a yes or a label out of a written answer, and try one of them on a decision API against your own labelled examples. Google's speed and price figures are its own, so the test that counts is whether its confidence scores match how often it is right on your data.
Most of what an agent asks a model is a decision, and decisions now have their own cheaper model.
$0.10per million input tokens on Google's Decisions API, output free
Source: SiliconANGLE · Wednesday, 11 November 2026