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Dashboard Benchmarks Models ECI Data About

GPT-5 nano (high)

The smallest version of OpenAI’s latest flagship frontier model, benchmarked using high reasoning effort.

Release date
2025-08-07
Developer
OpenAI
Accessibility
Non-open weights
139
Epoch Capabilities Index
RANK:
ECI is a composite metric based on over 42 benchmarks. Learn more.
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