OpenAI released GPT-6.1 Terra on Monday, October 26, the mid-tier model that was left out when the GPT-6 family launched last month. It succeeds GPT-5.6 Terra and is available now in ChatGPT Work and Codex for Plus, Pro, Enterprise and Edu users, and through the API as gpt-6.1-terra; it is also generally available on Amazon Bedrock. OpenAI positions it for workday computer use: drafting proposals, reading technical drawings, filling out forms and editing video.

The price is the headline. API pricing is $1 per million input tokens, $0.05 per million cached input and $5 per million output, which OpenAI says is half the price of both GPT-5.6 Terra and GPT-6.1 Sol. The context window is 1.05 million tokens with up to 128,000 tokens of output, and prompts above 272,000 input tokens are charged at higher rates.

On OpenAI's own figures, Terra scores 50.3% on Terminal-Bench 4.0 at maximum effort against 21.5% for GPT-5.6 Terra, and its error rate on an internal difficult-prompts test fell from 53.6% to 16.7% at low effort and to 4.3% at maximum effort. OpenAI also says it completes tasks more than three times faster than GPT-6 Astra and GPT-6.1 Sol, while still recommending Sol and Astra for the most complex coding. Artificial Analysis calls it a new mark for intelligence per dollar; those benchmark figures are vendor-reported and early third-party results, not yet independently settled.