GPT-4.5 vs GPT-1

Compare GPT-4.5 and GPT-1, both from OpenAI, in 2 community votes, gpt-4.5 wins 100% of head-to-head duels, context windows of 128K vs 1K, tested across 5 shared challenges. Updated March 2026.

Which is better, GPT-4.5 or GPT-1?

GPT-4.5 is the better choice overall, winning 100% of 2 blind community votes on Rival. Context windows: 128K vs 1K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-4.5 and GPT-1

GPT-4.5 is made by openai while GPT-1 is from openai. GPT-4.5 has a 128K token context window compared to GPT-1's 1K. In community voting, In 2 community votes, GPT-4.5 wins 100% of head-to-head duels.

In 2 community votes, GPT-4.5 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 2+ human preference judgments for this pair.

Our Verdict
GPT-4.5
GPT-4.5Winner
GPT-1
GPT-1Runner-up

Pick GPT-4.5. In 2 blind votes, GPT-4.5 wins 100% of the time. That's not luck.

Clear winner
FAQ

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