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Dashboard Benchmarks Models ECI Data About

o3-pro

An enhanced version of OpenAI’s previous flagship reasoning model o3, evaluated with high reasoning effort.

Release date
2025-06-10
Developer
OpenAI
Accessibility
Non-open weights
149
Epoch Capabilities Index
RANK:
90% CI: 146 - 155
ECI is a composite metric based on over 44 benchmarks. Learn more.
Reasoning
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