{"slug": "openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model", "title": "OpenAI upgrades ChatGPT and Codex with new GPT-6.1 Terra model", "summary": "OpenAI released GPT-6.1 Terra, upgrading its medium-sized model from GPT-5.6 and pricing it 50% lower than the version it replaces, with availability today through ChatGPT Work, Codex, and the API. OpenAI said the error rate on its internal benchmark of error-inducing prompts fell from 53.6% at low reasoning effort with GPT-5.6 Terra to 16.7% with GPT-6.1 Terra, a drop of nearly 37 percentage points, and fell 18 percentage points to 4.3% at maximum effort, nearly matching GPT-6 Astra and GPT-6.1 Sol. The release follows OpenAI's September 2026 GPT-6 update that included Sol and Luna but excluded Terra, and OpenAI positions GPT-6.1 Terra for computer-based work such as drafting proposals, interpreting technical drawings, filling out forms, and editing videos.", "body_md": "Earth is so back. Last month when OpenAI [released](https://9to5mac.com/2026/09/22/openai-upgrading-chatgpt-and-codex-with-two-more-gpt-6-models/) GPT-6 models of Sol and Luna, its medium model Terra was excluded from the update. Now OpenAI has upgraded Terra from GPT-5.6 to GPT-6.1, touting speed and computer use at a lower price.\n\n## GPT-6.1 Terra is OpenAI’s new medium-sized model that balances intelligence and affordability\n\nOpenAI currently has four main model classes, ranging from lowest price and capability to highest: Luna, Terra, Sol, and Astra.\n\nToday’s GPT-6.1 Terra model release sounds like a great solution for doing more work for longer without costing as much.\n\nHere are the high-level details from the announcement:\n\nWe’re introducing **GPT-6.1 Terra**, a fast, efficient model that combines detailed visual reasoning and precise computer use alongside clearer, more natural writing. A significant step up from GPT‑5.6 Terra, it excels at the communication and computer-based tasks that fill the workday, from drafting proposals and interpreting technical drawings to filling out forms and editing videos.\n\nOpenAI highlights that GPT-6.1 Terra pricing is actually 50% lower than the inferior version that it replaces, GPT-5.6 Terra, which makes it ideal for automating computer work tasks for less.\n\nIn terms of intelligence and accuracy, OpenAI says Terra is a step forward in these areas as well:\n\nOn 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, a drop of nearly 37 percentage points. At maximum 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.\n\nThe new GPT-6.1 Terra model is available today through ChatGPT Work, Codex, and the API. You can learn much more about the new medium-sized model [here](https://openai.com/index/introducing-gpt-6-1-terra/).\n\n**Do more with your Apple products**\n\n[AirPods 5 | Apple’s newest wireless headphones](https://amzn.to/4hnE1jt)\n\n[Apple AirTag 2 | Add Find My tracking to keys, bags, bikes, more](https://amzn.to/4vjNWN1)\n\n[AirPods Pro 3 | Apple’s best wireless headphones](https://amzn.to/4ut3FYp)\n\n*FTC: We use income earning auto affiliate links.* [More.](https://9to5mac.com/about/#affiliate)\n\n[our homepage](http://9to5mac.com/)for all the latest news, and follow 9to5Mac on\n\n[exclusive stories](https://9to5mac.com/feature/exclusive/),\n\n[reviews](https://9to5mac.com/guides/review/),\n\n[how-tos](https://9to5mac.com/guides/how-to/), and\n\n[subscribe to our YouTube channel](https://www.youtube.com/9to5mac)", "url": "https://wpnews.pro/news/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model", "canonical_source": "https://9to5mac.com/2026/10/26/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model/", "published_at": "2026-10-26 18:21:40+00:00", "updated_at": "2026-10-26 18:44:38.276224+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "generative-ai", "ai-products", "ai-tools"], "entities": ["OpenAI", "GPT-6.1 Terra", "GPT-5.6 Terra", "ChatGPT Work", "Codex", "GPT-6 Astra", "GPT-6.1 Sol", "GPT-6 Luna"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model", "markdown": "https://wpnews.pro/news/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model.md", "text": "https://wpnews.pro/news/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model.txt", "jsonld": "https://wpnews.pro/news/openai-upgrades-chatgpt-and-codex-with-new-gpt-6-1-terra-model.jsonld"}}