# Build responsive apps with Decisions API

> OpenAI launches Decisions API for faster, cheaper app decisions.
- Title: Build responsive apps with Decisions API · OpenAI | Shortify
- Summary: OpenAI launches Decisions API for faster, cheaper app decisions. OpenAI's Decisions API helps apps make near real-time decisions 10x faster with GPT-6 Luna…
- Keywords: decisions api, gpt-6 luna, openai, ai applications, real-time decisions, prompt caching, api pricing, gpt-live integration
- Source: OpenAI — https://openai.com/index/decisions-api
- Read time: 1 min
- Topics: decisions api, gpt-6 luna, openai, ai applications, real-time decisions, prompt caching, api pricing, gpt-live integration, ai, technology
## Decisions API launch
OpenAI makes Decisions API generally available for faster app decisions.
## GPT-6 Luna integration
Decisions API uses GPT-6 Luna to handle questions with bounded answers up to 10x faster.
## Key improvements
Added native GPT-Live integration, prompt caching, and inference residency in US and EU.
## New capabilities
Supports up to 400 questions per request, twice the previous limit with native json inputs.
## Use cases
Teams use Decisions for transaction categorization, coverage classification, and cost attribution.
## Customer examples
Box reduces route selection time by 5x with same accuracy as Responses API.
## Datadog integration
Datadog uses Decisions to score agent-generated commands 40x faster with comparable accuracy.
## Ramp cost savings
Ramp cuts AI cost attribution to 30% cheaper with same accuracy as GPT-6 Luna.
## Sierra performance
Sierra achieves 90% lower cost per call with 3x faster decisions in live conversations.
## Speak learning experience
Speak reduces time to next action from 1.4s to 0.13s for language learners.
## Answer types
Decisions API supports probability, choice, and score answer types for different use cases.
## GPT-Live integration
Decisions API integrates with GPT-Live for real-time voice experiences and expressions.
## Pricing details
Decisions API costs $0.10 per million input tokens with cached inputs at $0.01 per million tokens.
## Key takeaway

OpenAI's Decisions API helps apps make near real-time decisions 10x faster with GPT-6 Luna, supporting up to 400 questions per request.