GPT-4.5 vs Gemini 2.5 Flash Preview (thinking)
Compare GPT-4.5 by OpenAI against Gemini 2.5 Flash Preview (thinking) by Google AI, in 1 community votes, gpt-4.5 wins 100% of head-to-head duels, context windows of 128K vs 1.0M, tested across 12 shared challenges. Updated March 2026.
Which is better, GPT-4.5 or Gemini 2.5 Flash Preview (thinking)?
GPT-4.5 is the better choice overall, winning 100% of 1 blind community votes on Rival. GPT-4.5 costs $75/M input tokens vs $0.175/M for Gemini 2.5 Flash Preview (thinking). Context windows: 128K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between GPT-4.5 and Gemini 2.5 Flash Preview (thinking)
GPT-4.5 is made by openai while Gemini 2.5 Flash Preview (thinking) is from google. GPT-4.5 has a 128K token context window compared to Gemini 2.5 Flash Preview (thinking)'s 1049K. On pricing, GPT-4.5 costs $75/M input tokens vs $0.175/M for Gemini 2.5 Flash Preview (thinking). In community voting, In 1 community votes, GPT-4.5 wins 100% of head-to-head duels.
In 1 community votes, GPT-4.5 wins 100% of head-to-head duels. Based on blind community voting from the Rival open dataset of 1+ human preference judgments for this pair.
Our Verdict
GPT-4.5Winner
Gemini 2.5 Flash Preview (thinking)Runner-up
Pick GPT-4.5. In 1 blind votes, GPT-4.5 wins 100% of the time. That's not luck.
Gemini 2.5 Flash Preview (thinking) is 43x cheaper per token — worth considering if cost matters.
Clear winner
FAQ
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