# GPT-6 Luna Pro: API price, context window and how to connect

GPT-6 Luna Pro by OpenAI: $0.1 per million input tokens, $0.5 per million output tokens, a 1.05M-token window. What it is good for, what to compare it with and how to connect it in SKILLOK.

## In short

GPT-6 Luna in the `pro` reasoning mode: a cheap model given more time to think. An answer takes noticeably more tokens than plain Luna.

## Specifications

| | |
|---|---|
| Provider | [OpenAI](https://skillok.org/docs/en/ai-models/providers/openai) |
| Released | 2026-09-22 |
| Context window | 1.05M tokens |
| Accepts | files, images, text |
| Answers with | text |
| Reasoning mode | yes |
| Tool calling | yes |
| Open weights | no |
| Identifier | `openai/gpt-6-luna-pro` |

## Price

| Per 1M tokens | In dollars |
|---|---|
| Input (question, context) | $0.1 |
| Output (answer) | $0.5 |

For reference: a conversation of 20 questions of ~500 tokens and answers of ~800 tokens costs about **$0.009**. Models in reasoning mode spend more tokens on an answer than the text shows: the reasoning is paid for too.

## What it is good for

* Medium tasks for little money
* Checking reasoning before using an expensive model
* Step-by-step study problems

## Similar models

Catalog models with the same kind of output, closest in the price of a typical request.

| Model | Input | Output | Window | Price |
|---|---|---|---|---|
| [GPT-6 Luna](https://skillok.org/docs/en/ai-models/models/gpt-6-luna) | $0.1 | $0.5 | 1.05M | about the same |
| [Claude Haiku 5.5](https://skillok.org/docs/en/ai-models/models/claude-haiku-5-5) | $0.1 | $0.5 | 1M | about the same |
| [Qwen3.8 Flash](https://skillok.org/docs/en/ai-models/models/qwen3-8-flash) | $0.15 | $0.47 | 1M | about the same |
| [Qwen3.8 Omni Flash](https://skillok.org/docs/en/ai-models/models/qwen3-8-omni-flash) | $0.15 | $0.47 | 1M | about the same |
| [Mistral Small 4](https://skillok.org/docs/en/ai-models/models/mistral-small-2603) | $0.15 | $0.6 | 262K | 1.3× more expensive |

## Other OpenAI models

* [GPT-6.1 Sol](https://skillok.org/docs/en/ai-models/models/gpt-6-1-sol)
* [GPT-6.1 Sol Pro](https://skillok.org/docs/en/ai-models/models/gpt-6-1-sol-pro)
* [GPT-6 Luna](https://skillok.org/docs/en/ai-models/models/gpt-6-luna)

## How to connect in SKILLOK

GPT-6 Luna Pro works through OpenRouter: add an OpenRouter key in **Settings → AI** and pick the `openai/gpt-6-luna-pro` model. It then becomes available in Space AI, in tasks and to the repository agent. In detail — [Connecting a model in SKILLOK](https://skillok.org/docs/en/ai-models/connecting-in-skillok).

## Where the data comes from

Prices, the context window and capabilities come from the public OpenRouter catalog as of 2026-10-19. A provider may change the price — the exact figure is always on the model's OpenRouter page.

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https://skillok.org/docs/en/ai-models/models/gpt-6-luna-pro