Model•active

GPT-6 Luna

GPT-6 Luna is OpenAI's most efficient GPT-6 model for focused, high-volume workloads, with a 1.05M-token context window and up to 128K output tokens.

Official siteVerified Oct 6, 2026

Overview

The model accepts text and image input and returns text. It supports reasoning controls, function calling, structured output, web search, code execution, computer use, image generation, and other OpenAI tool surfaces.

Model specifications

Family: GPT-6
Context: 1,050,000 tokens
Input: Text, Image
Output: Text
Open weights: No
Capabilities: Reasoning, Vision, Tool Use, Function Calling, Structured Output, Web Search, Code Execution, Computer Use, Image Generation

Related entities

Available Via

APIactive

OpenAI API

OpenAI API provides programmatic access to OpenAI models through the Responses API, Realtime API, batch processing, and other model and media endpoints.

Belongs To

Model Familyactive

GPT-6

GPT-6 is OpenAI's current frontier model family, represented in iilib by GPT-6 Astra, GPT-6.1 Sol, GPT-6 Sol, and GPT-6 Luna.

Related by Develops

Companyactive

OpenAI

OpenAI is an AI research and deployment company that develops model, developer, and coding products including the Codex product family.