o3-pro
ECI#57
147o3-pro is a closed-weights model from OpenAI, released June 10, 2025. It has an ECI score of 147 and ranks 57th of 249 tracked models. At the time of its release, it ranked 1st of 143 tracked models. At $20/Mtok for input tokens and $80/Mtok for output tokens, it is more expensive per token than similarly-capable models.
Input price$20 / 1M tokens
Output price$80 / 1M tokens
ParametersUnknown
Training computeUnknown
o3-pro vs select alternatives
Reasoning
| Domain | Benchmark | o3-pro | |||
|---|---|---|---|---|---|
ECI scoreBest score 166 | 147 | 147 | 145 | 143 | |
| Ranking | #57 | #60 | #76 | #90 | |
| Conceptual reasoning | LMCABest score 63.3 | 38.5 | 39.7 | 34.8 | 37.4 |
ARC-AGI-2Best score 95.0% | |||||
DTBenchBest score 98.4% | |||||
ARC-AGI-1Best score 98.5% | |||||
| Long context | Fiction.liveBenchBest score 97.2% | ||||
| Software engineering | Aider PolyglotBest score 88.0% | ||||
WeirdML (v2)Best score 92.9% | |||||
| Writing & creativity | Lech Mazur WritingBest score 8.6 | 8.4 | 8.4 | 8.4 | 8.4 |
