What OpenAI actually launched
Announced on 26 October 2026, GPT-6.1 Terra is a step up from GPT-5.6 Terra, focused on communication and computer-based workday tasks: drafting proposals, interpreting technical drawings, filling out forms and editing videos. It is the workhorse of the GPT-6.1 family — not the flagship reasoner, but the model built to get everyday computer work done quickly and cheaply.
Half the price of GPT-6.1 Sol
Standard API pricing is $1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens — 50% lower than GPT-5.6 Terra and GPT-6.1 Sol. For teams running high-volume document, form and video work, that price gap compounds fast.
| Model | Input per million tokens | Output per million tokens |
|---|---|---|
| GPT-6.1 Terra | $1 (cached $0.05) | $5 |
| GPT-6.1 Sol | About double Terra | About double Terra |
Speed and accuracy where it counts
- On Agents' Last Exam at medium reasoning effort, Terra scores 15 percentage points higher than GPT-5.6 Terra at about one-third the cost, and matches GPT-6 Astra at one-tenth its price per token
- At maximum effort, Terra completes tasks over 3 times faster than GPT-6 Astra and GPT-6.1 Sol, and is over 3 times as token-efficient as Claude Opus 5.5
- On Terminal-Bench 4.0 at max effort, Terra solves 50.3% of tasks versus GPT-5.6 Terra's 21.5%
- On OpenAI's error-inducing prompts, the internal error rate fell from 53.6% to 16.7% at low effort and 4.3% at max effort
The pattern is consistent: Terra is not trying to out-reason the flagship models. It is trying to finish ordinary computer work faster, cheaper and with fewer errors — and on the benchmarks OpenAI chose, it does.
Where you can use it
GPT-6.1 Terra is available to all Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and via the API as gpt-6.1-terra. It also meets the Critical cybersecurity threshold under OpenAI's Preparedness Framework, which matters for teams running it on sensitive internal documents.
Look at this technical drawing and build a 3D model from it. List every dimension you used, flag any dimension that is unclear or missing, and do not guess measurements — report them as unresolved instead.
Frequently Asked Questions
How is GPT-6.1 Terra different from GPT-6.1 Sol?
Terra is the cheaper, faster workhorse for computer-use and workday tasks, at half the API price of Sol. Sol is the stronger general reasoner. Pick Terra for volume document, form and video work, and Sol when the reasoning itself is the hard part.
What is GPT-6.1 Terra's API pricing?
$1 per million input tokens, $0.05 per million cached input tokens and $5 per million output tokens. That is 50% lower than GPT-5.6 Terra and GPT-6.1 Sol.
Is GPT-6.1 Terra available in ChatGPT?
Yes, for Plus, Pro, Enterprise and Edu users in ChatGPT Work and Codex, and via the API as gpt-6.1-terra.
Can Terra really edit video timelines?
OpenAI positions Terra for tasks like reviewing an animated film shot by shot to create a time-coded log and editing video timelines. Treat it as strong assistance, not a replacement for a human editor — review every cut before publishing.
Is Terra safe for sensitive work documents?
OpenAI states Terra meets the Critical cybersecurity threshold under its Preparedness Framework. That is a vendor assessment, so apply your own data policies and access controls on top of it for confidential material.
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