OpenAI API pricing
GPT-6 Luna pricing
Input / 1M tokens
$0.10
Output / 1M tokens
$0.50
Cached input / 1M
$0.01
Prompts over 272,000 tokens cost $0.20 in and $0.75 out per million, for the whole request.
Source: OpenAI pricing, checked 1 Nov 2026. API name: gpt-6-luna.
Price your prompt on GPT-6 Luna
What a prompt costs on GPT-6 Luna
| Example | Tokens in / out | Cost | 1,000 a day, per month |
|---|---|---|---|
| A short question and answer | 50 / 300 | $0.0002 | $4.65 |
| A one-page document summarised | 700 / 400 | $0.0003 | $8.10 |
| A 300-line code file reviewed | 4,000 / 1,200 | $0.0010 | $30.00 |
| A 50-page report summarised | 35,000 / 1,500 | $0.0043 | $127.50 |
Token sizes are typical, not exact. Replies include any thinking the model does.
Other GPT models
GPT-6 AstraGPT-6.1 SolGPT-6.1 TerraGPT-5.5GPT-5.4 miniGPT-5 nano
FAQ
How much does GPT-6 Luna cost?
$0.10 per million input tokens and $0.50 per million output tokens on OpenAI's standard API tier, and $0.01 per million for cached input. Checked 1 Nov 2026.
What does one prompt cost on GPT-6 Luna?
A 1,000-token prompt with a typical medium-length reply costs about $0.0005. Paste your own prompt into the calculator for an exact figure.