GPT-6 Luna

Name: GPT-6 Luna
Price: 0.1 USD
Author: OpenAI

GPT-6vLunaCurrent

OpenAI(ai lab)

Released September 22, 2026

API Docs Playground

Context1.1M tokens

Price (In / Out)$0.10/M / $0.50/M

Training Cutoff2026-05-18

CategoryLarge Language Model

Max Output128K tokens

About GPT-6 Luna

GPT-6 Luna is OpenAI's efficient reasoning model for focused, high-volume tasks. It accepts text and images, produces text, supports a 1,050,000-token context window and 128,000 output tokens, and is available through the Responses and Chat Completions APIs under the exact gpt-6-luna identifier.

Capabilities

textvisionreasoningcodingtool uselong contextcontext caching

Input Modalities

textimage

Output Modalities

text

Technical Details

API Identifier: gpt-6-luna
Category: Large Language Model
Context Window: 1,050,000 tokens
Max Output Tokens: 128,000 tokens

Benchmarks

Performance scores for GPT-6 Luna across standard benchmarks.

Artificial Analysis Intelligence Index v4.3.2Artificial Analysis

37.2559686869738%

Pricing

Token pricing for GPT-6 Luna API usage.

Input Tokens

$0.10/M

per million tokens

Output Tokens

$0.50/M

per million tokens

Pricing Calculator

Input tokens/month

Output tokens/month

Input cost$0.10

Output cost$0.25

Estimated monthly cost$0.35

OpenAI standard API, USD per million tokens for prompts up to 272K input tokens: $0.10 input, $0.01 cached input, $0.125 cache writes, $0.50 output. Above 272K input tokens, the full request costs 2x input/cache and 1.5x output. Batch/Flex cost 50% of Standard; Fast costs 2x; regional processing adds 10% where available. Reasoning output tokens are charged at output rates.

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Model	Context Window	Price (In / Out per M)	Capabilities
GPT-6.1 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+4
GPT-6 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+3
GPT-5.6 LunaCurrent	1.1M	$0.20 / $1.20	textvisionreasoningcoding+5
GPT-5.6 TerraCurrent	1.1M	$2.00 / $12.00	textvisionreasoningcoding+5
GPT-5.6 SolCurrent	1.1M	$4.00 / $20.00	textvisionreasoningcoding+5
GPT-5.5 ProCurrent	1.1M	$30.00 / $180.00	textvisioncodetool use+2