We’ve added ECI scores for Gemini 3 Pro, Opus 4.5, and GPT-5.2. ECI...
Epoch AI@EpochAIResearch
127 views
Dec 17, 2025
~1 min read
Advertisement
1
We’ve added ECI scores for Gemini 3 Pro, Opus 4.5, and GPT-5.2. ECI is computed from many benchmarks, but it correlates with other benchmarks too. So, we can use it to make predictions!
Here’s what we get for METR’s Time Horizons.
Gemini 3 Pro: 4.9h
GPT-5.2: 3.5h
Opus 4.5: 2.6h
Here’s what we get for METR’s Time Horizons.
Gemini 3 Pro: 4.9h
GPT-5.2: 3.5h
Opus 4.5: 2.6h
2
Note that our 90% prediction intervals are quite wide, spanning a factor of 2x longer or shorter than our central estimate.
Also, ECI underestimated previous Claude models on Time Horizons by 30% on average. If we account for that, we predict Opus 4.5 will get 3.8 hours.
Also, ECI underestimated previous Claude models on Time Horizons by 30% on average. If we account for that, we predict Opus 4.5 will get 3.8 hours.
3
Explore the ECI and over 40 benchmarks on our website!
epoch.ai/benchmarks
epoch.ai/benchmarks
