OpenAI releases GPT-6.1 Terra to ChatGPT, Codex, and the API
Original title: GPT-6.1 Terra meets OpenAI’s Critical cyber threshold, and it’s cheaper than GPT-5.6 Terra
API prices are half those of GPT-5.6 Terra, and OpenAI says Terra meets its Critical cybersecurity threshold.
OpenAI released GPT-6.1 Terra, a model that operates desktop software, to Plus, Pro, Enterprise, and Edu users in ChatGPT Work and Codex, and to developers as gpt-6.1-terra. API prices are $1 per million input tokens, $0.05 per million cached input tokens, and $5 per million output tokens, 50 percent below GPT-5.6 Terra and GPT-6.1 Sol. OpenAI says Terra meets the Critical cybersecurity threshold in its April 2025 Preparedness Framework and keeps safeguards built for GPT-6 Astra. On the company’s benchmarks it scores above GPT-5.6 Terra on Agents’ Last Exam and cuts error rates, while GPT-6.1 Sol and GPT-6 Astra remain preferred for the hardest coding tasks.
Unconfirmed: Benchmark scores, prompt-injection results, and the Critical designation are OpenAI’s own claims.
- At medium effort, Agents’ Last Exam is 15 points above GPT-5.6 Terra at about one-third the cost.
- Low-effort error rate fell from 53.6 percent to 16.7 percent; max effort is 4.3 percent.
- Terminal-Bench 4.0 at max effort: 50.3 percent, versus 21.5 percent for GPT-5.6 Terra.
- OpenAI designated Astra Critical on September 1, 2026; Terra keeps Astra’s protections.
- Vendors
- OpenAI
From the original article
2 min read at helpnetsecurity.com
OpenAI released GPT-6. 1 Terra, a model that operates desktop software, to all Plus, Pro, Enterprise, and Edu users in ChatGPT Work and Codex, and to developers through its API as gpt-6. 1-terra.
By Anamarija Pogorelec · helpnetsecurity.com
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