o3-mini
Smaller o-series reasoner for economical coding, math, and planning tasks
ECI STANDING#106 of 266
SCORE140.35137.21–141.89 CI
FRONTIER LAGLaunched 1.5 months behindScores about what o1 did in December 2024.
SCORES LIKE THESE MODELS
Full Epoch Capabilities Index ranking ↗Gemini 2.5 Flash (Jun 2025)Google DeepMind · Jun 2025140.53
Grok-3 minixAI · Jun 2025140.35
Kimi K2 (Jul 2025)Moonshot · Jul 2025140.11
gpt-oss-120bOpenAI · Aug 2025140.1RELEASE DATEDec 20, 2024
WEIGHTSClosed weights
CONTEXT WINDOW200K
MAX OUTPUT100K
REASONINGYes
TOOL CALLINGYes
INPUTStext
OUTPUTStext
Specifications from Models.dev. Availability and limits may differ by provider. Benchmark scores come from Epoch AI under CC BY 4.0.