GPT-5 Mini vs o3 Mini
Compare GPT-5 Mini and o3 Mini, both from OpenAI, tested across 54 shared challenges. Updated April 2026.
Which is better, GPT-5 Mini or o3 Mini?
GPT-5 Mini and o3 Mini are both competitive models. GPT-5 Mini costs $0.25/M input tokens vs $1.1/M for o3 Mini. Compare their real outputs side by side below.
Key Differences Between GPT-5 Mini and o3 Mini
GPT-5 Mini is made by openai while o3 Mini is from openai. On pricing, GPT-5 Mini costs $0.25/M input tokens vs $1.1/M for o3 Mini.
No community votes yet. On paper, GPT-5 Mini has the edge — bigger model tier, newer.
Style Comparison
o3 Mini uses 390.2x more bold
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
