OpenAI: GPT-5.6 Luna Pro

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

Context
1.1M
Max output
128K
Input price
$0.2/1M tokens
Output price
$1.2/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode

Details

Model IDopenai/gpt-5.6-luna-pro
Provider OpenRouter
Creator OpenAI
Familygpt-5.6
License—
Status—
Typechat
Input modalitiesimage, text
Output modalitiestext
Open weight—
Parameters—
Architecture—
Context window1.1M tokens
Max input—
Max output128K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Pricing

Input
$0.2
Output
$1.2
Cache write
—
Cache read
$0.02
Batch in
—
Batch out
—

Family Comparison: gpt-5.6

ModelContextMax outPricing
OpenAI: GPT-5.6 Luna (batch)1.1M128K$0.1$0.6
OpenAI: GPT-5.6 Luna Pro (batch)1.1M128K$0.1$0.6
OpenAI: GPT-5.6 Luna Pro1.1M128K$0.2$1.2
OpenAI: GPT-5.6 Luna1.1M128K$0.2$1.2
OpenAI: GPT-5.6 Terra (batch)1.1M128K$1$6
OpenAI: GPT-5.6 Terra Pro (batch)1.1M128K$1$6
OpenAI: GPT-5.6 Sol (batch)1.1M128K$2$10
OpenAI: GPT-5.6 Sol Pro (batch)1.1M128K$2$10
OpenAI: GPT-5.6 Terra Pro1.1M128K$2$12
OpenAI: GPT-5.6 Terra1.1M128K$2$12
OpenAI: GPT-5.6 Sol Pro1.1M128K$4$20
OpenAI: GPT-5.6 Sol1.1M128K$4$20

API

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

OpenAI: GPT-5.6 Luna Pro

openai/gpt-5.6-luna-pro

GPT-5.6 Luna Pro is the same underlying model as GPT-5.6 Luna, served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks.

Changes · 5 entries
openai/gpt-5.6-luna-procreateca7a400Nov 2, 2026, 03:02 AM
openai/gpt-5.6-luna-proupdatee3d7dedAug 31, 2026, 04:13 AM
pricinginput$0.1→$0.2output$0.6→$1.2cached input$0.01→$0.02
openai/gpt-5.6-luna-proupdate39b8745Jul 31, 2026, 06:11 AM
pricinginput$0.5→$0.1output$3→$0.6cached input$0.05→$0.01
openai/gpt-5.6-luna-proupdatedbe2d73Jul 31, 2026, 06:07 AM
pricinginput$1→$0.5output$6→$3cached input$0.1→$0.05
openai/gpt-5.6-luna-procreate105275dJul 10, 2026, 12:00 AM