/ Models Index / OpenAI o3-mini

OpenAI o3-mini

Reasoning · OpenAI · OpenAI · Released Jan 2025
B+

Good (B+) — Capability Grade

o3-mini is the cost-efficient reasoning tier. Strong math and coding benchmarks at materially lower per-token cost than o3. Standard production tier for reasoning workloads at scale.

86
Composite / 100
/ Subscore Breakdown · 6 Capability Dimensions

Where this grade comes from.

General Reasoning
B+
Code Generation
B+
Math & STEM
A-
Tool Use & Agency
B
Multimodal
C
Safety & Alignment
B+
/ Key Events & Disclosures

Release timeline & positioning.

  • Released Jan 2025
  • Cost-efficient reasoning tier
  • Strong math benchmarks
  • Production-tier deployment

/ Best for

Production reasoning workloads at scale — math, code, and step-by-step analysis.

/ Watch out for

Not multimodal. For vision-required workloads, use GPT-5 mini or Claude Sonnet.