From the daily edition · 27 Oct 2026Models and releases
OpenAI says GPT-6.1 Terra meets Critical cybersecurity threshold, at half GPT-5.6 Terra's price
OpenAI says GPT-6.1 Terra, a model it describes as built for computer use and visual reasoning, costs $1 per million input tokens and $5 per million output tokens from 26 October 2026.
In short
- OpenAI published GPT-6.1 Terra on 26 October 2026 for Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and in the API as gpt-6.1-terra.
- API pricing is $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens, which OpenAI says is 50% below GPT-5.6 Terra.
- OpenAI says GPT-6.1 Terra meets the Critical threshold in cybersecurity under its Preparedness Framework and keeps the protections developed for GPT-6 Astra.
OpenAI introduced GPT-6.1 Terra on 26 October 2026, describing it as a fast model for computer use and visual reasoning. It is available to Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and through the API as gpt-6.1-terra.
Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens. The benchmark figures in OpenAI's post are OpenAI's own results. The post says GPT-6.1 Terra meets the Critical threshold in cybersecurity under OpenAI's Preparedness Framework.
What it means for you · our view
If you run GPT-5.6 Terra or GPT-6.1 Sol in production, rerun your own tasks on gpt-6.1-terra before switching. OpenAI's benchmark gains, such as 50.3% on Terminal-Bench 4.0 against 21.5% for GPT-5.6 Terra, are its own results.
OpenAI also says GPT-6.1 Sol and GPT-6 Astra remain the better choice for the most complex coding tasks. The Critical cybersecurity designation is OpenAI's statement about its own model, and the explainer below sets out what that level means.
Before you give Terra computer use, ask your security team whether your agent permissions and outbound controls need review.
How we checked this · the sources12 checked facts from 1 source.
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Introducing GPT-6.1 Terra · OpenAI · archived copy
- OpenAI published "Introducing GPT-6.1 Terra" on 26 October 2026.
checked 27 Oct 2026October 26, 2026
- OpenAI describes GPT-6.1 Terra as "a fast, efficient model that combines detailed visual reasoning and precise computer use alongside clearer, more natural writing."
checked 27 Oct 2026We’re introducing GPT-6.1 Terra, a fast, efficient model that combines detailed visual reasoning and precise computer use alongside clearer, more natural writing.
- OpenAI says GPT-6.1 Terra is available to all Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex.
checked 27 Oct 2026Starting today, GPT-6.1 Terra is available to all Plus, Pro, Enterprise, and Edu users in ChatGPT Work and Codex.
- OpenAI says developers can access GPT-6.1 Terra through the OpenAI API as gpt-6.1-terra.
checked 27 Oct 2026Developers can also access it through the OpenAI API as gpt-6.1-terra.
- OpenAI states standard API pricing for GPT-6.1 Terra of $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens.
checked 27 Oct 2026Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens.
- OpenAI says GPT-6.1 Terra's standard API prices are 50% lower than those of GPT-5.6 Terra and GPT-6.1 Sol.
checked 27 Oct 2026Its standard API prices are 50% lower than those of GPT-5.6 Terra and GPT-6.1 Sol
- OpenAI says that at medium reasoning effort GPT-6.1 Terra scores 15 percentage points higher than GPT-5.6 Terra on Agents' Last Exam at about one-third the cost, and performs on par with GPT-6 Astra at one-tenth its price per token.
checked 27 Oct 2026At medium reasoning effort, GPT-6.1 Terra scores 15 percentage points higher than GPT-5.6 Terra at about one-third the cost. It even performs on par with GPT-6 Astra at only one-tenth its price per token.
- OpenAI says that at max effort GPT-6.1 Terra is over three times as token efficient as Claude Opus 5.5 and one-fourth its price per token, resulting in a roughly 9x lower cost per task.
checked 27 Oct 2026At max effort, Terra is over three times as token efficient as Claude Opus 5.5, and one-fourth its price per token, resulting in a ~9x lower cost per task.
- OpenAI says GPT-6.1 Terra solves 50.3% of tasks on Terminal-Bench 4.0 at maximum reasoning effort, against GPT-5.6 Terra's published score of 21.5%, and that GPT-6.1 Sol and GPT-6 Astra remain the better choice for the most complex coding tasks.
checked 27 Oct 2026At maximum reasoning effort, GPT‑6.1 Terra solves 50.3% of tasks, more than double GPT‑5.6 Terra’s published score of 21.5%. For the most complex coding tasks, GPT-6.1 Sol and GPT-6 Astra remain the better choice.
- OpenAI says that on its internal benchmark of error-inducing prompts the error rate at low reasoning effort fell from 53.6% with GPT-5.6 Terra to 16.7% with GPT-6.1 Terra, and at maximum effort fell by 18 percentage points to 4.3%.
checked 27 Oct 2026On our internal benchmark of error-inducing prompts, the error rate at low reasoning effort fell from 53.6% with GPT-5.6 Terra to 16.7% with GPT-6.1 Terra
- OpenAI says GPT-6.1 Terra "meets the Critical threshold in cybersecurity under our Preparedness Framework, and maintains the protections developed for GPT‑6 Astra."
checked 27 Oct 2026GPT‑6.1 Terra meets the Critical threshold in cybersecurity under our Preparedness Framework, and maintains the protections developed for GPT‑6 Astra.
- OpenAI says it measured GPT-6.1 Terra on Agents' Last Exam, MMMU-Pro, OSWorld 2.1, Terminal-Bench 4.0 and Terminal-Bench-Science 0.1, and that the post's error-rate figures come from its internal benchmark.
checked 27 Oct 2026We measured GPT-6.1 Terra’s computer-use capabilities on Agents’ Last Exam
- OpenAI published "Introducing GPT-6.1 Terra" on 26 October 2026.