GPT-4.5 vs GPT-o3 mini

Performance Benchmarks

Knowledge & Reasoning Tasks

SimpleQA (Factual Accuracy)
62.5%
15%
GPQA (Scientific Reasoning)
71.4%
79.7%
AIME '24 (Mathematics)
36.7%
87.3%
GPT-4.5
GPT-o3 mini
o3-mini excels at math & reasoning
GPT-4.5 leads in factual accuracy

Coding & Practical Tasks

SWE-Lancer Diamond
32.6%
10.8%
SWE-Bench Verified
38%
61%
Generation Speed (tokens/sec)
37
167.3
GPT-4.5
GPT-o3 mini
o3-mini is 4.5x faster and better
at code reliability