GPT-6.1 Terra halves OpenAI's API prices and still gains ground on its larger models

OpenAI released GPT-6.1 Terra, priced at $1 per million input tokens and $5 per million output tokens—half the cost of GPT-5.6 Terra and below Claude Sonnet 5.5's $2/$10. Artificial Analysis reports it gains 6 Intelligence Index points over GPT-5.6 Terra at maximum reasoning effort while costing $0.40 versus $1.40 per task, and it solves 50.3% of Terminal-Bench 4.0 tasks versus 21.5% for its predecessor. It is available now for Plus, Pro, Enterprise, and Edu users in ChatGPT Work and Codex and via the API, though OpenAI still recommends GPT-6.1 Sol and GPT-6 Astra for the most demanding coding tasks.