GPT-5.6 Luna Pricing & Token Cost Calculator (1050K context)

What GPT-5.6 Luna costs in practice

Workload	Cost / call	Cost @ 1K req/day
Light · 1K in / 300 out	$0.0009	$28.00/mo
Standard · 10K in / 2K out	$0.0068	$206.97/mo
Heavy · 100K in / 20K out	$0.0680	$2069.75/mo

Estimates assume medium reasoning effort, no batch discounts and no prompt caching. Turn on prompt caching and the input side typically drops 50–90% — run your own mix in the free calculator preloaded with GPT-5.6 Luna.

About this page

Prices were last verified on August 20, 2026 against OpenAI's official pricing page. Providers reprice frequently — see our methodology for exactly how estimates are computed, and always confirm final rates with the provider before budgeting.

GPT-5.6 Luna FAQ

How much does GPT-5.6 Luna cost?

GPT-5.6 Luna charges $0.20 per million input tokens and $1.20 per million output tokens, with cached input reads at $0.02/M. Batch mode cuts both rates by 50% for asynchronous workloads.

What is the context window of GPT-5.6 Luna?

GPT-5.6 Luna supports a context window of 1,050,000 tokens (1.1M) — roughly 787,500 English words or about 1,575 pages of text in a single request.

Does GPT-5.6 Luna support images, audio or reasoning?

GPT-5.6 Luna offers vision & image understanding, audio input, hidden reasoning tokens. GPT-5.6 budget tier. Long-context doubles above 200K input.

How do I estimate my GPT-5.6 Luna bill?

A typical workload of 10K input and 2K output tokens costs about $0.0068 per call with GPT-5.6 Luna. At 1,000 requests per day that is roughly $206.97 per month. Use the free AITokenCalculator to run your exact numbers.