Gemini 1.5 Pro vs o1
Compare Gemini 1.5 Pro by Google AI against o1 by OpenAI, context windows of 1.0M vs 128K, tested across 19 shared challenges. Updated June 2026.
Which is better, Gemini 1.5 Pro or o1?
Gemini 1.5 Pro and o1 are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $15/M for o1. Context windows: 1000K vs 128K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 1.5 Pro and o1
Gemini 1.5 Pro is made by google while o1 is from openai. Gemini 1.5 Pro has a 1000K token context window compared to o1's 128K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $15/M for o1.
Per 1M tokens
Gemini 1.5 Pro is cheaper on both — 4.3× input, 5.7× output
No community votes yet. On paper, Gemini 1.5 Pro has the edge — bigger model tier, bigger context window.
Gemini 1.5 Pro is 5.7x cheaper per token — worth considering if cost matters.
Style Comparison
o1 uses 5.4x more headings
