OpenAI Halves GPT-6.1 Terra API Prices #
OpenAI cut GPT-6.1 Terra's standard API prices by 50%. Input now costs $1 per million tokens, output $5, and cached input $0.05. Terra targets high-volume work including invoice processing, desktop automation, visual reasoning, and form completion.
OpenAI says Terra matches GPT-6 Astra on Agents' Last Exam at one-tenth the token price and finishes tasks more than three times faster. On Terminal-Bench 4.0, it solves 50.3% of coding tasks at maximum reasoning effort, versus 21.5% for GPT-5.6 Terra. Artificial Analysis also found a sharp cost-efficiency gain.
Terra is available through the API, ChatGPT Work, and Codex. AWS says reusable prompt-cache prefixes must remain identical and reach 1,024 tokens to qualify.
Why it matters: For teams automating invoices and desktop tasks, Terra cuts the estimated per-task cost against GPT-5.6 Terra from $1.40 to $0.40—and gives Anthropic's Sonnet 5.5 a rival priced at half its token rates.
Key Takeaways
- Plus, Pro, Enterprise, and Edu users can access Terra in ChatGPT Work and Codex, while developers use gpt-6.1-terra through the API.
- Artificial Analysis puts Terra at 48 on its Coding Agent Index v2.0, six points below GPT-6.1 Sol and 17 points above GPT-6 Luna.
- OpenAI still recommends GPT-6.1 Sol and GPT-6 Astra for the most demanding coding tasks, limiting Terra's role as a full replacement.