GPT-6.1 Terra
OpenAIMULTIMODAL Proprietary
- Provider
- OpenAI
- Modality
- MULTIMODAL
- Parameters
- —
- Context window
- —
- Weights
- Proprietary
- Released
- 26 Oct 2026
GPT-6.1 Terra (26 October 2026) is OpenAI's fast, lower-cost model for computer use, visual reasoning and writing — filling forms, drafting proposals and working through apps. It replaces GPT-5.6 Terra at half the price.
Best for
- Automating browser and office work: forms, data entry, reports
- Visual reasoning over screenshots and documents
- High-volume agent tasks where cost per task decides the design
How it compares — and the India angle
- $1 / $5 per million tokens — half of GPT-5.6 Terra and of GPT-6.1 Sol.
- OpenAI reports 50.3% on Terminal-Bench 4.0 at maximum effort, up from 21.5% — but Claude Opus 5.5 (66.4%) and Kimi K3.1 Pro (65.7%) are stronger coders.
- In ChatGPT it is only in ChatGPT Work and Codex, not regular chat.
- OpenAI rates it at the Critical cybersecurity threshold in its Preparedness Framework.
Benchmarks
Representative public scores (approximate, higher is better) for relative comparison. Check the provider for the latest official results.
Terminal-Bench 4.0 (max effort)50.3
How to access
API gpt-6.1-terra: $1 / 1M input, $5 / 1M output. Reasoning effort none to max, medium by default. In ChatGPT Work and Codex for paid plans.
Access GPT-6.1 TerraFrequently asked questions
What is GPT-6.1 Terra?
GPT-6.1 Terra is a multimodal AI model developed by OpenAI.
Who made GPT-6.1 Terra?
GPT-6.1 Terra was created by OpenAI.
Is GPT-6.1 Terra open source?
No, GPT-6.1 Terra is a proprietary model with closed weights.
What is GPT-6.1 Terra's context window?
The context window size for GPT-6.1 Terra has not been publicly disclosed.