o3-pro
High-effort o3 tier for difficult technical reasoning and careful answers
ECI STANDING#57 of 266
SCORE147.45145.85–149.7 CI
FRONTIER LAGLaunched in the leadNothing released before it had scored higher.
SCORES LIKE THESE MODELSQwen 3.6 PlusAlibaba · Mar 2026147.67Qwen3.7-PlusAlibaba · Jun 2026147.41Qwen3.5 397B-A17BAlibaba · Feb 2026146.96o3OpenAI · Apr 2025146.91
Full Epoch Capabilities Index ranking ↗RELEASE DATEJun 10, 2025
WEIGHTSClosed weights
CONTEXT WINDOW200K
MAX OUTPUT100K
REASONINGYes
TOOL CALLINGYes
INPUTStext, image
OUTPUTStext
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