The Model Index
Models/OpenAI

GPT-6.1 Terra

OpenAIClosed weightsFlagship

GPT-6.1 Terra is a closed AI model from OpenAI, released 26 Oct 2026, with no index score yet.

–Index scoreNo third-party results yet
$1.0/ $5.0Price per million tokensinput / output · via OpenRouter
1.05MContext windowtokens it reads at once
26 Oct 2026Released1 day ago

Where it sitson the frontier

801001201401601802002023202420252026GPT-4 at launch = 100

Not plotted: no third-party score yet.

Test resultsby area · tick = best by any model

Reasoning & knowledgeno evidence yet
GPQA Diamond (Epoch AI)
no result
Humanity's Last Exam
no result
Mathsno evidence yet
FrontierMath (tiers 1-3)
no result
Codingno evidence yet
SWE-bench Verified
no result
Terminal-Bench 4.0
no result
Agentsno evidence yet
APEX-Agents
no result
Professional workno evidence yet
Finance Agent (v2)
no result
Novel problemsno evidence yet
ARC-AGI-2
no result
Long tasksno evidence yet
METR time horizon
no result

Third-party results only, at the model’s best standard setting. Hover a bar for who ran it.

What others sayrank on each leaderboard

Not on any of the rankings we follow yet.

Best attop three among current models

Not in the top three among current models on any category we track.

Facts and sources

Released26 Oct 2026
Announcementopenai.com ↗
Release entryGPT-6.1 Terra
Scored as–
Output speed91 tokens/s
Hugging Faceclosed weights

OpenAI releasesaround this one

This page as a chartDownload PNG