OpenAI: GPT Luna Latest

This model always redirects to the latest model in the GPT Luna family.

The GPT Luna Latest documentation on OpenRouter includes the GPT-6 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

GPT Luna Latest has no fixed price of its own. Each request is billed at the price of the model that serves it, so your cost depends on which model the request is routed to.

GPT Luna Latest can route to models with context windows of up to 1,050,000 tokens. The context length available to a request is that of the model that serves it.

GPT Luna Latest accepts files such as PDFs, images, and text as input and returns text.

GPT-6.1 Terra Pro, GPT-6.1 Terra, GPT-6 Luna Decisions and 58 more are other text models from OpenAI.

GPT Luna Latest was released on September 11, 2026.