GPT 5.6 Luna

GPT-5.6 Luna is a fast, affordable GPT-5.6 model that brings strong capability at the lowest cost in the series.

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index.ts

import { streamText } from 'ai'

const result = streamText({
  model: 'openai/gpt-5.6-luna',
  prompt: 'Why is the sky blue?'
})

Latency24 hours

P50 time to first token (TTFT) on live AI Gateway traffic, in milliseconds. View the docs for more info.