OpenAI: GPT Terra Latest

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

The GPT Terra Latest documentation on OpenRouter includes the GPT-5.6 Migration Guide cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

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

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

GPT Terra Latest was released on September 11, 2026.