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⚡ EfficientBudget-Friendly

GPT-5.6 Luna

by OpenAI

Fastest and most cost-efficient GPT-5.6 variant for high-volume agentic and coding workloads.

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Input Price

$1

per 1M tokens

Output Price

$6

per 1M tokens

Context Window

1,050K

tokens (128K max output)

Specifications

Release Date2026-06-26
Category⚡ Efficient
Context Window1,050,000 tokens
Max Output128,000 tokens
ProviderOpenAI
Input Cost$1 / 1M tokens
Output Cost$6 / 1M tokens
Price TierBudget-Friendly

Capabilities

textvisioncodereasoning

Related Use Cases

🤖

AI Agent / Agentic Workflows

Calculate the cost of running AI agents that use tools, make decisions, and complete multi-step tasks.

~10,000 in · ~3,000 out
💬

AI Chatbot

Calculate the API cost of running a customer support or conversational AI chatbot.

~2,000 in · ~500 out
📄

Document Summarizer

Calculate how much it costs to summarize documents, reports, and articles with AI.

~8,000 in · ~1,000 out
💻

AI Code Assistant

Calculate the cost of building an AI-powered coding assistant or copilot.

~4,000 in · ~2,000 out
✍️

Content Generation

Calculate the cost of generating blog posts, marketing copy, and articles with AI.

~1,500 in · ~3,000 out
🖼️

Image Analysis

Calculate the cost of analyzing images with AI vision models.

~6,000 in · ~500 out

Monthly Cost Estimates

Usage LevelDaily TokensDailyMonthlyYearly
Light~50 requests/day100K in / 20K out$0.22$6.60$80
Medium~200 requests/day500K in / 100K out$1.10$33.00$402
Heavy~1K requests/day2,000K in / 500K out$5.00$150.00$1825
Enterprise~5K requests/day10,000K in / 2,000K out$22.00$660.00$8030

Cost Calculator

Alternatives to GPT-5.6 Luna

💰 Cheaper Options

Claude Haiku 4.5Anthropic
14% cheaper
$1/M in · $5/M out
o1-miniOpenAI
21% cheaper
$1.1/M in · $4.4/M out
o3-miniOpenAI
21% cheaper
$1.1/M in · $4.4/M out
o4-miniOpenAI
21% cheaper
$1.1/M in · $4.4/M out

🚀 More Powerful

Codex MiniOpenAI
7% more
$1.5/M in · $6/M out
Grok 4.5xAI
14% more
$2/M in · $6/M out
Mistral Medium 3.5Mistral AI
29% more
$1.5/M in · $7.5/M out
o4-mini Deep ResearchOpenAI
43% more
$2/M in · $8/M out

Frequently Asked Questions

How much does GPT-5.6 Luna API cost per million tokens?▼
GPT-5.6 Luna costs $1 per million input tokens and $6 per million output tokens as of 2026. These are the standard API rates from OpenAI.
What is the GPT-5.6 Luna context window?▼
GPT-5.6 Luna supports a 1.05M context window (1,050,000 tokens), which means you can process up to 1.05M tokens in a single API call.
How much does GPT-5.6 Luna cost per month?▼
At medium usage (~200 requests/day with 500K input and 100K output tokens/day), GPT-5.6 Luna costs approximately $33.00/month. Light usage runs about $6.60/month, and heavy usage (~1K requests/day) around $150.00/month.
Is there a cheaper alternative to GPT-5.6 Luna?▼
Yes — Claude Haiku 4.5 by Anthropic is a cheaper option at $1/M input tokens vs $1/M for GPT-5.6 Luna. Other budget alternatives include models in the efficient tier.
Is GPT-5.6 Luna good for ai agent / agentic workflows?▼
GPT-5.6 Luna is a efficient model with support for text, vision, code. For ai agent / agentic workflows, it offers 1.05M context and costs $1/M input tokens — a budget-friendly choice for this use case.

GPT-5.6 Luna Comparisons

codex mini latest vs gpt 5 6 lunagpt 5 6 luna vs o4 mini deep researchgpt 5 6 luna vs o3 deep researchgpt 5 2 vs gpt 5 6 lunagpt 5 2 pro vs gpt 5 6 lunagpt 5 6 luna vs gpt 5 6 solgpt 5 6 luna vs gpt 5 6 terragpt 5 5 vs gpt 5 6 luna

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