GPT-4.5 vs GPT-5
Compare GPT-4.5 and GPT-5, both from OpenAI, in 9 community votes, gpt-5 wins 100% of head-to-head duels, context windows of 128K vs 400K, tested across 25 shared challenges. Updated May 2026.
Which is better, GPT-4.5 or GPT-5?
GPT-5 is the better choice overall, winning 100% of 9 blind community votes on Rival. GPT-4.5 costs $75/M input tokens vs $1.25/M for GPT-5. Context windows: 128K vs 400K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and GPT-5
GPT-4.5 is made by openai while GPT-5 is from openai. GPT-4.5 has a 128K token context window compared to GPT-5's 400K. On pricing, GPT-4.5 costs $75/M input tokens vs $1.25/M for GPT-5. In community voting, In 9 community votes, GPT-5 wins 100% of head-to-head duels.
In 9 community votes, GPT-5 wins 100% of head-to-head duels. GPT-5 leads in Web Design, Image Generation. Based on blind community voting from the Rival open dataset of 9+ human preference judgments for this pair.
Per 1M tokens
GPT-5 is cheaper on both — 60× input, 15× output
Pick GPT-5. In 9 blind votes, GPT-5 wins 100% of the time. That's not luck.
GPT-5 particularly excels in Web Design, Image Generation. GPT-5 is 15x cheaper per token — worth considering if cost matters.
Style Comparison
GPT-4.5 uses 24.7x more bold
