All OpenAI models

GPT-5.6 Luna

OpenAI · released 1 month ago

GPT-5.6 Luna is a OpenAI model with a 1.05M token context window — about 1,500 pages of text. It reads Files, Images, and Text and replies in Text. It can show its reasoning before it answers.

$0.115

input / 1M tokens

$0.690

output / 1M tokens

1.05M

context — about 1,500 pages

0.11¢

a client proposal

Pricing

Input
$0.115 per million tokens
Output
$0.690 per million tokens
Cached input
$0.011 per million tokens
Cache writes
$0.144 per million tokens
Web search
0.57¢ per search
Long-context rate (over 272K)
$0.230 in · $1.03 out, per million tokens

Billed from your Alyph wallet. Prices can change when the provider changes theirs — last checked August 9, 2026.

The numbers

Provider
OpenAI
Released
1 month ago (2026-07-09)
Context window
1.05M tokens — about 1,500 pages
Max output
128K tokens per reply
Input
Files, Images, and Text
Output
Text
Reasoning
Shows its thinking before answering
Knowledge cutoff
2026-02-16

Cost vs Token Amount

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80% Input20% Output
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GPT-5.6 Luna

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What a task costs

2K tokens in · 500 tokens out.

GPT-5.6 Luna

OpenAI

0.06¢

for this task

40% input · 60% output

Full pricing →

Your $5 welcome credit covers about 8,695 of these.

Compare GPT-5.6 Luna

Closest in price on a typical task:

GPT-5.6 Luna vs GPT-5.6 Luna Pro →GPT-5.6 Luna vs Hermes 4 70B →GPT-5.6 Luna vs Qwen3 30B A3B →GPT-5.6 Luna vs Qwen3 8B →Any other combination →

Questions, answered

How much does GPT-5.6 Luna cost on Alyph?

GPT-5.6 Luna costs $0.115 per million input tokens and $0.690 per million output tokens on Alyph. A typical task — 5K tokens in, 800 out — works out to about 0.11¢. Billed from your Alyph wallet, with hard spending limits. Prices can change when the provider changes theirs; this page was last checked on August 9, 2026.

What is GPT-5.6 Luna's context window?

1.05M tokens — about 1,500 pages. Replies can be up to 128K tokens long. Prompts longer than 272K tokens are billed at the long-context rate.

Can GPT-5.6 Luna read images and files?

GPT-5.6 Luna reads Files, Images, and Text. Drop a file onto the canvas and it becomes part of the context — the only limit is the context window.

Does GPT-5.6 Luna show its reasoning?

Yes. GPT-5.6 Luna can expose its thinking before the final answer, so you can watch how it got there.

Test GPT-5.6 Luna against GPT-5.6 Luna Pro

One prompt, both models at the same time, the better answer wins. Free to start, with $5 of credit.

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