free-pi

GPT-6.1 Terra Flex

  • OpenAI
  • Reasoning
  • Tool calling
  • 1.05M context
  • Released Oct 2026

Use it free in free-pi

slower · ~20x usage

In your terminal

Then, inside free-pi

Context1.05M1,050,000 tokens
Max output128K128,000 tokens
Intelligence51Artificial Analysis index
Inputs3Text, image, file
Usage in free-pi~20xvs. the default model

About GPT-6.1 Terra Flex

GPT-6.1 Terra Flex is the same model as GPT-6.1 Terra, served on OpenAI's flex tier, which is slower and cheaper. The model is unchanged: the same 1,050,000-token context window and the same reasoning, tool calling, and structured output support.

Responses are slower on the flex tier, and the model uses less of your daily allowance. Its usage rate is shown above. It is still free with no API key and no card.

When to pick it

For GPT-6.1 Terra's quality on work that is not urgent, such as a large refactor or a long investigation, pick GPT-6.1 Terra Flex. For faster responses, pick the regular GPT-6.1 Terra.

Stats refreshed automatically. Released Oct 26, 2026.