/ Models Index / GPT-5 mini

GPT-5 mini

Frontier · OpenAI · OpenAI · Released Sep 2025
A-

Excellent (A-) — Capability Grade

GPT-5 mini is OpenAI's cost-efficient frontier tier. Strong general capability per dollar; competitive with Claude Haiku 4.5. Standard tool-use ecosystem.

88
Composite / 100
/ Subscore Breakdown · 6 Capability Dimensions

Where this grade comes from.

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

Release timeline & positioning.

  • Released Sep 2025
  • Cost-efficient OpenAI tier
  • Strong throughput economics
  • Multimodal at small-model price

/ Best for

Cost-sensitive production workloads requiring OpenAI ecosystem integration.

/ Watch out for

Reasoning depth lags GPT-5 flagship. Multi-step agentic workflows perform better on full GPT-5 or Claude Sonnet 4.6.