GPT-5 (high) on Humanity's Last Exam: 21.4% accuracy

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Summary

GPT-5 (high) from OpenAI scored 21.4 on Humanity's Last Exam, placing it top 10 (rank 6 of 97) on this benchmark. This places the model in the weak band for Humanity's Last Exam. Below the threshold for production reliance on this benchmark family. Consider only for narrow, fully-tested tasks.

Model details

• Provider: OpenAI

• Model key: openai/gpt-5-high

• Context length: 400,000 tokens

• License: Proprietary

• Open weights: no

Benchmark methodology

Secondary metrics

• Readability score: 53.2

• Toxicity score: 0.001

• Ethics score: 0.000

Run this evaluation yourself

Stratix evaluates GPT-5 (high) continuously across 11+ benchmarks. To replicate this Humanity's Last Exam evaluation on your own model, traces, or a different benchmark configuration, open the model in Stratix.

Source: Stratix evaluation 68ffb622d90dfc27d9963dbd. Updated 2025-10-30.