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 April 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.
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
vsAsk them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
