OpenAI: GPT-5.6 Luna Pro

Provided by OpenRouter

GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-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

Specifications

Context Length

1,050,000 tokens

Input Price

$0.200/M

Output Price

$1.20/M

Vision Support

Yes

Capabilities

TextVision

About OpenAI: GPT-5.6 Luna Pro

Strengths

•Multimodal understanding - can process text and images
•Large context window (1050k tokens) for long conversations

Use Cases

•Image and document understanding
•Content creation and writing assistance
•General conversations and Q&A

Limitations

Performance may vary based on query complexity, context length, and task type. Consider using higher-tier models for production-critical applications.

Sample Prompts

Try these prompts to explore OpenAI: GPT-5.6 Luna Pro's capabilities:

Analyze this image and describe what you see in detail

Extract the key information from this screenshot

Compare the two images and explain the differences

Tip: Customize these prompts to fit your specific needs and use cases.

Credits required

OpenAI: GPT-5.6 Luna Pro uses tiered credit pricing. Subscribe for a monthly credit allowance, connect your own provider API key (BYOK), or browse lower-cost models on the catalog.

Credit cost per message is shown in the model picker. Economy models typically cost 1 credit; frontier models cost more.

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