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GPT 5.6 Luna (Fast)

GPT-5.6 Luna is a fast, affordable GPT-5.6 model that brings strong capability at the lowest cost in the series. Your use is subject to OpenAI's Terms & Privacy Policies.

ReasoningFile InputTool UseVision (Image)Implicit CachingWeb SearchWebsockets
Use with AI GatewayView docs
import { streamText } from 'ai'


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

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Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.

Provider
Context
Max Output
Latency
Throughput
Input
Output
Cache
Web Search
Capabilities
ZDR
No Training
Regional Inference
Release Date
OpenAI
Legal:Terms•Privacy
1.1M128K
1.7s
211tps
$0.40/M+1 more
$2.40/M+1 more
Read:$0.1/M$0.04/M+2 more
Write:$1.25/M$0.25/M+2 more
$10/K
+ input costs
+4
US
07/09/2026