Openai’s GPT-6.1 Terra Brings Cheaper, Faster AI Agents

WHO:

MarkTechPost - OpenAI released GPT-6.1 Terra, a model for computer use and vision.

9to5Mac - OpenAI describes GPT-6.1 Terra as a medium-sized model balancing intelligence and affordability.

9to5Mac - OpenAI’s four main model classes, ordered from lowest to highest price and capability, are Luna, Terra, Sol, and Astra.

WHAT:

MarkTechPost - GPT-6.1 Terra is priced at $1 per million input tokens and $5 per million output tokens.

MarkTechPost - On the Agents’ Last Exam benchmark, Terra matched GPT-6 Astra’s score at medium effort; the reported cost per task was $0.29 for Terra versus $4.82 for Astra.

9to5Mac - OpenAI upgraded Terra from GPT-5.6 to GPT-6.1, highlighting speed, computer use, visual reasoning, and clearer, more natural writing.

9to5Mac - OpenAI said Terra supports tasks including drafting proposals, interpreting technical drawings, filling out forms, and editing videos.

9to5Mac - OpenAI said Terra’s price is 50% lower than that of the GPT-5.6 Terra model it replaces.

9to5Mac - On OpenAI’s internal benchmark of error-inducing prompts, low-effort error rates fell from 53.6% with GPT-5.6 Terra to 16.7% with GPT-6.1 Terra, a drop of nearly 37 percentage points.

9to5Mac - At maximum reasoning effort, the error rate fell by 18 percentage points to 4.3%, nearly matching the rates for GPT-6 Astra and GPT-6.1 Sol.

Techmeme - OpenAI described the model as delivering “fast and capable computer use at scale” and “clearer, more natural writing.”

9to5Mac - GPT-6.1 Terra is available through ChatGPT Work, Codex, and the API.

WHY:

9to5Mac - OpenAI presented Terra as a way to automate computer-based work at lower cost and do more work for longer.

HOW:

MarkTechPost - Terra combines computer-use capabilities with vision; 9to5Mac additionally describes detailed visual reasoning and precise computer use.

(UPDATED October 27, 2026 04:09 UTC)

OpenAI has released GPT-6.1 Terra, a medium-sized model designed for computer use and vision, with improved speed, visual reasoning, and clearer writing. It can handle tasks such as drafting proposals, interpreting technical drawings, filling out forms, and editing videos, and costs $1 per million input tokens and $5 per million output tokens—half the price of the model it replaces. On one benchmark, Terra matched the score of GPT-6 Astra at medium effort while costing 29 cents per task, compared with $4.82 for Astra, and it’s available through ChatGPT Work, Codex, and the API.