Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. GPT-5 mini offers 228.0K more tokens in context window than o4-mini. GPT-5 mini is $3.25 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
OpenAI
GPT-5 Mini was created as a more accessible version of GPT-5, designed to provide strong capabilities with improved efficiency and lower operational costs. Built to extend GPT-5's advancements to a broader range of applications, it balances advanced performance with practical deployment considerations.
OpenAI
o4-mini was created as part of the next generation of OpenAI's reasoning models, designed to continue advancing the balance between analytical capability and operational efficiency. Built to bring cutting-edge reasoning techniques to applications requiring quick turnaround, it represents the evolution of compact reasoning-focused models.
3 months newer

o4-mini
OpenAI
2025-04-16

GPT-5 mini
OpenAI
2025-08-07
Cost per million tokens (USD)

GPT-5 mini

o4-mini
Context window and performance specifications
Average performance across 3 common benchmarks

GPT-5 mini

o4-mini
GPT-5 mini
2024-05-30
o4-mini
2024-05-31
Available providers and their performance metrics

GPT-5 mini
OpenAI
ZeroEval


GPT-5 mini

o4-mini

GPT-5 mini

o4-mini
o4-mini
OpenAI