What GPT-6 Luna is
GPT-6 Luna is an OpenAI model that went live on OpenRouter on September 22, 2026. It follows GPT-5.6 Luna. Per standard answer it costs 2.3 times less, $0.0003 against $0.0008, and it keeps the same 1M token context window.
| Released | September 22, 2026 |
| Provider | OpenAI |
| Context window | 1M tokens |
| Input, per million tokens | $0.1 |
| Output, per million tokens | $0.5 |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Starter |
How to try GPT-6 Luna in Whizi
Whizi puts GPT-6 Luna in the same model picker as ChatGPT, Claude and Gemini, so there is no separate OpenAI account or API key to set up. Pick a plan on the pricing page, open a new chat, choose GPT-6 Luna in the model picker and send your first message.
Each message costs 1 credit, whatever its length. If a question turns out to suit another model better, switch in the same conversation and the thread carries across. See switching models mid-conversation.
What GPT-6 Luna costs
List rates are what the provider charges per token. The cost of one standard answer is the more useful number, because it prices the same unit of work across every model regardless of how each one is billed.
| Input, per million tokens | $0.1 |
| Output, per million tokens | $0.5 |
| One standard answer | $0.0003 |
| One thousand answers | $0.3500 |
| Context window | 1M tokens |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Starter |
| Rank by cost, of 119 priced models | 18 |
Prices are the published OpenAI rates as carried by OpenRouter, last refreshed 2026-09-26. The full dataset covering all 130 models from 34 providers is the AI model cost index, which is free to reuse with attribution.
What it costs inside Whizi
Whizi meters messages in credits rather than tokens, and GPT-6 Luna is charged at 1 credit per message. The cost does not change with the length of your message or the length of the answer, so a one line question and a long document analysis cost the same.
| Plan | Price per month | Monthly credits | Messages on this model |
|---|---|---|---|
| Starter | $15.99, or $10.99 billed yearly | 800 | 800 |
| Pro | $29.99, or $19.99 billed yearly | 2,500 | 2,500 |
| Powerhouse | $49.99, or $34.99 billed yearly | 10,000 | 10,000 |
GPT-6 Luna is included on every plan, including Starter. The Starter models are the ones that cost 1 credit per message, which is what makes a 800 credit allowance go a long way. See plans and limits.
- Input $0.1 and output $0.5 per million tokens
- $0.0003 for one standard answer, $0.3500 for a thousand
- 1M token context window
- 1 credit per message inside Whizi
- Requires the Starter plan or above
- Ranks 18 of 119 priced models by cost per answer
Frequently asked questions
What is GPT-6 Luna?
GPT-6 Luna is an OpenAI model released on September 22, 2026, with a 1M token context window. It follows GPT-5.6 Luna. Per standard answer it costs 2.3 times less, $0.0003 against $0.0008, and it keeps the same 1M token context window.
How do I use GPT-6 Luna?
Sign up for Whizi, open a new chat and choose GPT-6 Luna in the model picker. It is available on every plan, including Starter at 1 credit per message, with no OpenAI account or API key needed.
How much does GPT-6 Luna cost?
$0.1 per million input tokens and $0.5 per million output tokens at list rates, which works out to $0.0003 for one standard answer of 1,000 tokens in and 500 out, or $0.3500 for a thousand of them. Inside Whizi it is 1 credit per message on a monthly allowance, rather than metered per token.
Which Whizi plan includes GPT-6 Luna?
Every plan, including Starter at $15.99 per month or $10.99 billed yearly. At 1 credit per message, a Starter allowance of 800 credits covers 800 messages on it.
