What does GPT-6.1 Terra cost?

Paid · from $1 per million input tokens. The October 26, 2026 announcement lists standard API prices of $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens. The model page also lists cache writes at $1.25 per million tokens for 30-minute retention and $2.50 for 12-hour retention, before long-context adjustments, and higher rates for prompts over 272K input tokens. ChatGPT plan prices are not on the announcement.

Chat assistants Coding agents

GPT-6.1 Terra

4.2/ 5

OpenAI's fast model for visual reasoning, computer use, and writing.

Also known as GPT-6.1 Terra, gpt-6.1-terra

What it does

GPT-6.1 Terra is an OpenAI model announced on October 26, 2026 for visual reasoning, computer use, and writing. It is available in the API as gpt-6.1-terra, and in ChatGPT Work and Codex. The announcement lists Plus, Pro, Enterprise, and Edu. The ChatGPT release notes the same day also include Business. The model page lists text and image input, text output, a 1,050,000-token context window, up to 922,000 input tokens, 128,000 max output tokens, and a June 1, 2026 knowledge cutoff. Reasoning effort runs from none through max, with medium as the default. Tool calling requires the Responses API. Standard API prices on the announcement are $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens. OpenAI says that is 50% lower than GPT-5.6 Terra and GPT-6.1 Sol. The announcement does not list a ChatGPT plan price.