At its October 2026 launch, GPT-6.1 Terra was available to ChatGPT Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex

Introducing GPT-6.1 Terra

OpenAI introduces GPT-6.1 Terra, a fast, efficient model for visual reasoning, computer use and writing, priced at half of GPT-5.6 Terra and GPT-6.1 Sol.

Opening sign-in…