OpenAI makes the Decisions API generally available for low-latency classifiers and rubrics

OpenAI has made the Decisions API (POST /v1/decisions) generally available on gpt-6-luna. Designed for workloads that need structured judgements rather than free-form prose, the endpoint accepts text, images or native JSON (input_json) and evaluates a batch of independent questions in parallel at up to 10 times the speed of gpt-6-luna through the Responses API.

Decision types and GA additions

Each question in the questions array specifies one of three typed schemas: predicate (returns a boolean outcome when a calibrated probability between 0 and 1 meets a configurable threshold), choice (selects one key from up to 20 options with per-option probability distributions) or score (assigns a 1-indexed integer across 2 to 10 ordered rubric levels, plus an expected value score_ev and level probabilities).

New for general availability are native GPT-Live triggers that fire mid-conversation events during voice sessions without blocking speech, prompt caching on shared input prefixes, image attachments inside per-question instructions, and enterprise compliance controls including Private Link, Zero Data Retention, HIPAA eligibility and US or EU regional processing.

Key numbers

• Batch capacity: up to 400 questions per request (doubled from 200 in public beta) and up to 50 images per request across a 128k context window.
• Input pricing on gpt-6-luna: $0.10 per 1M uncached input tokens and $0.01 per 1M cached input tokens (90% discount), with zero charge for output tokens.