Unverified50% confidenceBenchmarkExact time

According to data published by OpenAI, on the Agents Last Exam benchmark, at medium reasoning effort, GPT-6.1 Terra scored 57.6% and GPT-5.6 Terra scored 42.6%, an improvement of 15 percentage points.

1

Sources

50%

Confidence

Short-term (~14 days)

Relevance

10/28/2026

First Seen

Valid until: 11/11/2026

Sources

GPT-6.1 Terra Hands-On: One-Prompt Websites, and the Trade-Off Between Speed and Cost

Related Entities

OpenAIcompany GPT-6.1 Terramodel GPT-5.6 Terramodel Agents Last Examconcept

Related Claims

UnverifiedIn CAD World's 200-task evaluation, the best-performing GPT-5.4 achieved a success rate of only 17.5%.74% similar UnverifiedIn EvoArena testing, GPT-5.5, which achieved the highest Step Level score, had an accuracy of just over 50%, while Gemini-3.1 Pro and GLM-5.1, which performed best at the Chain Level, reached only approximately 28%–29%.73% similar

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