GPT-6.1 Terra

About GPT-6.1 Terra

GPT-6.1 Terra is a model from OpenAI in the GPT-6.1 series, priced below GPT-6.1 Sol. The context window is 1,050,000 tokens. It supports reasoning with an effort setting, tool calling, and structured outputs. With tool calling, the free-pi agent can read and edit files, run commands, and use free-pi's built-in web search and documentation lookup tools.

In free-pi it is free to use with no API key and no card, but it is a premium model. Its usage rate is shown above.

When to pick it

For harder coding tasks where you want more capability than the default, pick GPT-6.1 Terra. For the same model at a lower allowance cost when you can wait longer for replies, pick GPT-6.1 Terra Flex. For the longest-lasting allowance, use the default DeepSeek V4 Flash.