OpenAI releases GPT-6.1 Terra with cheaper API and a smaller gap to larger models

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

OpenAI released GPT-6.1 Terra, cutting API prices and improving results on reasoning, coding and computer-control benchmarks. Input and output cost $1 and $5 per million tokens, down from $2 and $12 for GPT-5.6 Terra. Artificial Analysis measured a 6-point intelligence index gain at its highest reasoning effort, with cost per task falling from $1.40 to $0.40.

Why it matters: Independent testing puts GPT-6.1 Terra 6 index points above its predecessor, with cost per task down from $1.40 to $0.40.