gpt-5.6-luna

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

Provider OpenAI
Creator openai
Familygpt-5.6
Licenseproprietary
Parameters—
Statusactive
Input modalitiestext, image
Output modalitiestext
Architecture—
Knowledge cutoff
Training data cutoff—
Release date—
Deprecation date—
Typechat
Reasoning tokensYes
Max input922K tokens
Open weightNo
Sourceofficial
Last updated

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
InputCached inputOutput
Standard$0.2$0.02$1.2
Price history · $/1M input
$1
$0.2
Jul 10Jul 31
DateInputOutputCache readChange
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

ProviderInputOutputSince 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

ModelContextMax outPricing
gpt-5.6-luna1.1M128K$0.2$1.2
gpt-5.6-terra1.1M128K$2$12
gpt-5.6-sol1.1M128K$5$30
gpt-5.6-cyber400K128K$12.5$75

API

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

gpt-5.6-luna

Changes · 3 entries
gpt-5.6-lunaupdate39b8745Jul 31, 2026, 06:11 AM
pricinginput$1→$0.2output$6→$1.2cached input$0.1→$0.02tiers[{"label":"Text tokens","unit":"Per 1M tokens","columns":...→[{"label":"Text tokens","unit":"Per 1M tokens","columns":...
gpt-5.6-lunaupdatebbbc783Jul 12, 2026, 07:45 AM
capabilitiesbatchyes
gpt-5.6-lunacreate105275dJul 10, 2026, 12:00 AM