Measured on Composite
This model has not carried enough traffic on Composite yet to publish a success rate, a latency figure or a traffic rank. The numbers appear here once it has.
AI model
OpenAI: GPT-6 Luna Pro (Reasoning)
openai/gpt-6-luna-pro-reasoning
OpenAI: GPT-6 Luna Pro (Reasoning) is a 1,050,000-token model served on Composite at $0.0160 per million tokens in and $0.250 per million tokens out.
Try in PlaygroundSpecifications
| Model ID | openai/gpt-6-luna-pro-reasoning |
|---|---|
| Provider | OpenAI |
| Context window | 1,050,000 tokens |
| Accepts | file, image, text |
| Returns | text |
| Input price | $0.0160 per million tokens |
| Output price | $0.250 per million tokens |
| Prompt caching | Supported — cached input is 60% off the list rate on pay-as-you-go credits |
| Web search | $0.0100 per result |
| Thinking | Optional - see "OpenAI: GPT-6 Luna Pro (Reasoning) (Reasoning)" in the catalog to turn it on by default |
| Moderated | Yes - by the provider |
| Cost on a monthly plan | 1 request of the daily allowance per call |
| Plans that may spend on it | Every plan, plus pay-as-you-go credits |
| Routing endpoints | 1 |
Pricing
$0.0160 per million tokens input · $0.250 per million tokens output
Input and output are charged at the provider’s list price.
On a monthly plan, one call costs 1 request of that day's allowance.
Provider
OpenAI
Roleplay fit
This is an OpenAI model, a dependable baseline with broad instruction-following and consistent formatting across long conversations.
Context behavior
With a 1,050,000-token context window, it can hold a long-running roleplay or a full lorebook in memory without losing earlier plot details, so it suits multi-session campaigns and character cards with heavy backstory.
Cost for regular use
It is priced low enough for high-volume daily roleplay without the per-message cost adding up quickly.
From the provider
GPT-6 Luna Pro is the same underlying model as [GPT-6 Luna](https://openrouter.ai/openai/gpt-6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode
Supplied by OpenAI, not written by Composite.
Related models
Composite GPT Router · OpenAI: GPT-6 Luna Pro · OpenAI: GPT-6 Luna