GPT-4.5 vs GPT-4o mini
Compare GPT-4.5 and GPT-4o mini, both from OpenAI, context windows of 128K vs 128K, tested across 25 shared challenges. Updated May 2026.
Which is better, GPT-4.5 or GPT-4o mini?
GPT-4.5 and GPT-4o mini are both competitive models. GPT-4.5 costs $75/M input tokens vs $0.15/M for GPT-4o mini. Context windows: 128K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and GPT-4o mini
GPT-4.5 is made by openai while GPT-4o mini is from openai. GPT-4.5 has a 128K token context window compared to GPT-4o mini's 128K. On pricing, GPT-4.5 costs $75/M input tokens vs $0.15/M for GPT-4o mini.
Per 1M tokens
GPT-4o mini is cheaper on both — 500× input, 250× output
No community votes yet. On paper, GPT-4.5 has the edge — bigger model tier, newer.
GPT-4o mini is 250x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.5 uses 2.3x more transitions
