GPT-5.6 Luna

Name: GPT-5.6 Luna
Price: 0.2 USD
Author: OpenAI

GPT-5.6vLunaCurrent

OpenAI(ai lab)

Released July 9, 2026

API Docs

OpenTools Scorenormalized /100

70.7

Valuescore / $M

OpenTools Score

Context1.1M tokens

Price (In / Out)$0.20/M / $1.20/M

Training CutoffFeb 16, 2026

CategoryLarge Language Model

Max Output128K tokens

About GPT-5.6 Luna

GPT-5.6 Luna is OpenAI lower-cost GPT-5.6 model for high-volume reasoning, coding, and agentic workloads. OpenAI model docs list the same 1.05M token context window, 128K max output, and major tool support as the larger GPT-5.6 variants.

Capabilities

textvisionreasoningcodingtool useweb searchfile searchcomputer useagents

Input Modalities

textimage

Output Modalities

text

Technical Details

API Identifier: gpt-5.6-luna
Category: Large Language Model
Context Window: 1,050,000 tokens
Max Output Tokens: 128,000 tokens

Benchmarks

Performance scores for GPT-5.6 Luna across standard benchmarks.

Artificial Analysis Intelligence IndexArtificial Analysis · Jul 2026

51%

Artificial Analysis Coding Agent IndexArtificial Analysis · Jul 2026

74.6%

Artificial Analysis Intelligence Index v4.3Artificial Analysis

37.5048%

GPQA DiamondArtificial Analysis

91.1111%

SciCodeArtificial Analysis

53.588%

Terminal-Bench 2.1Artificial Analysis

80.8989%

Pricing

Token pricing for GPT-5.6 Luna API usage.

Input Tokens

$0.20/M

per million tokens

Output Tokens

$1.20/M

per million tokens

Pricing Calculator

Input tokens/month

Output tokens/month

Input cost$0.20

Output cost$0.60

Estimated monthly cost$0.80

OpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing.

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OpenAIai lab

Creating safe AGI that benefits all of humanity

249 Tools58 MCP Servers14 ModelsFounded 2015San Francisco, CA

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AI Models by OpenAI

Large language models from the same organization.

Model	Context Window	Price (In / Out per M)	Capabilities
GPT-6.1 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+4
GPT-6 LunaCurrent	1.1M	$0.10 / $0.50	textvisionreasoningcoding+3
GPT-6 SolCurrent	1.1M	$2.00 / $10.00	textvisionreasoningcoding+3
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