gpt-5.6-luna

Name: gpt-5.6-luna
Author: OpenAI

proprietary

Intelligence

Reasoning

Speed

Context

1.1M

Max output

128K

Input price

$0.2/1M tokens

Output price

$1.2/1M tokens

Capabilities

vision

tool call

structured output

reasoning

json mode

streaming

fine tuning

batch

Details

ProviderOpenAI

Creatoropenai

Familygpt-5.6

Licenseproprietary

Parameters—

Statusactive

Input modalitiestext, image

Output modalitiestext

Architecture—

Knowledge cutoff2026-02

Training data cutoff—

Release date—

Deprecation date—

Typechat

Reasoning tokensYes

Max input922K tokens

Open weightNo

Sourceofficial

Last updated2026-07-31

Tools

Function Callingfunction_calling

Call external functions and APIs

Endpoints

ResponsesPOST

Stateful multi-turn conversationshttps://api.openai.com/v1/responses

Chat CompletionsPOST

Generate chat responses with messageshttps://api.openai.com/v1/chat/completions

BatchPOST

Async batch processing at lower costhttps://api.openai.com/v1/batches

Pricing

Text tokensPer 1M tokens

	Input	Cached input	Output
Standard	$0.2	$0.02	$1.2

Price history · $/1M input

$0.2

Jul 10Jul 31

Date	Input	Output	Cache read	Change
Jul 10, 2026	$1	$6	$0.1	—
Jul 31, 202639b8745tiers updated	$0.2	$1.2	$0.02	↓80%

Input is ↓80% since Jul 10, 2026, from $1 to $0.2 per 1M tokens.

Price across providers

Provider	Input	Output	Since launch
OpenRoutercheapest	$0.1	$0.6	↓90%
Cursor	$0.2	$1.2	—
OpenAI	$0.2	$1.2	↓80%
Perplexity	$0.2	$1.2	↓80%
Vercel AI Gateway	$0.2	$1.2	↓80%

Family Comparison: gpt-5.6

Model	Caps	Context	Max out	Pricing
gpt-5.6-luna	RVTS	1.1M	128K	$0.2$1.2
gpt-5.6-terra	RVTS	1.1M	128K	$2$12
gpt-5.6-sol	RVTS	1.1M	128K	$5$30
gpt-5.6-cyber	RVTS	400K	128K	$12.5$75

API

GET/v1/models/openai/gpt-5.6-luna