GPT-4.5 vs o3 Mini
Compare GPT-4.5 and o3 Mini, both from OpenAI, in 14 community votes, gpt-4.5 wins 70% of head-to-head duels, context windows of 128K vs 64K, tested across 25 shared challenges. Updated May 2026.
Which is better, GPT-4.5 or o3 Mini?
GPT-4.5 is the better choice overall, winning 70% of 14 blind community votes on Rival. GPT-4.5 costs $75/M input tokens vs $1.1/M for o3 Mini. Context windows: 128K vs 64K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and o3 Mini
GPT-4.5 is made by openai while o3 Mini is from openai. GPT-4.5 has a 128K token context window compared to o3 Mini's 64K. On pricing, GPT-4.5 costs $75/M input tokens vs $1.1/M for o3 Mini. In community voting, In 14 community votes, GPT-4.5 wins 70% of head-to-head duels.
In 14 community votes, GPT-4.5 wins 70% of head-to-head duels. GPT-4.5 leads in Reasoning, Image Generation. Based on blind community voting from the Rival open dataset of 14+ human preference judgments for this pair.
Per 1M tokens
o3 Mini is cheaper on both — 68× input, 34× output
Pick GPT-4.5. In 14 blind votes, GPT-4.5 wins 70% of the time. That's not luck.
GPT-4.5 particularly excels in Image Generation, Reasoning. o3 Mini is 34x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.5 uses 3.8x more lists
