GPT-6.1 Terra was released by OpenAI on October 26, 2026, as a lightweight model in the GPT Terra line.
Replaces GPT-5.6 Terra at half the input price and well under half the output price, and scores 6 points higher on the Artificial Analysis Intelligence Index.
Compared with GPT-5.6 Terra · the model it replaces
Scores higher than GPT-5.6 Terra on a combined set of hard tests
Artificial Analysis Intelligence Index v4.3.2 — one score averaging 10 hard tests
48
▲ up from 42 for GPT-5.6 Terra · +6 points · both at max effort
Costs developers about half as much as GPT-5.6 Terra
Price per 1M tokens — what developers pay, input / output
$1 / $5
▲ down from $2 / $12 for GPT-5.6 Terra
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GPT-6.1 Terra is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: GPT-6.1 Terra · Oct 26, 2026
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