OpenAI says GPT-6.1 Terra solves 50.3% of tasks on Terminal-Bench 4.0 at maximum reasoning effort, against GPT-5.6 Terra's published score of 21.5%, and that GPT-6.1 Sol and GPT-6 Astra remain the better choice for the most complex coding tasks.

The exact words it rests on

At maximum reasoning effort, GPT‑6.1 Terra solves 50.3% of tasks, more than double GPT‑5.6 Terra’s published score of 21.5%. For the most complex coding tasks, GPT-6.1 Sol and GPT-6 Astra remain the better choice.

What the source said when we opened it, on 27 Oct 2026.

The source

Introducing GPT-6.1 Terra
OpenAI · 2026-10-26

Open the sourcearchived copy

Checked

Checked by the notis newsroom on 27 Oct 2026, against the source above.

The number in it

• 50.3% · GPT-6.1 Terra, benchmark score (Terminal-Bench 4.0, maximum reasoning effort (OpenAI's own))

In the story

OpenAI says GPT-6.1 Terra meets Critical cybersecurity threshold, at half GPT-5.6 Terra's price 27 Oct 2026