Gemini 1.5 Pro vs GPT-3.5 Turbo
Compare Gemini 1.5 Pro by Google AI against GPT-3.5 Turbo by OpenAI, context windows of 1.0M vs 16K, tested across 18 shared challenges. Updated May 2026.
Which is better, Gemini 1.5 Pro or GPT-3.5 Turbo?
Gemini 1.5 Pro and GPT-3.5 Turbo are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $1.5/M for GPT-3.5 Turbo. Context windows: 1000K vs 16K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 1.5 Pro and GPT-3.5 Turbo
Gemini 1.5 Pro is made by google while GPT-3.5 Turbo is from openai. Gemini 1.5 Pro has a 1000K token context window compared to GPT-3.5 Turbo's 16K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $1.5/M for GPT-3.5 Turbo.
Per 1M tokens
GPT-3.5 Turbo is cheaper on both — 2.3× input, 5.3× output
No community votes yet. On paper, Gemini 1.5 Pro has the edge — bigger model tier, newer, bigger context window.
GPT-3.5 Turbo is 5.3x cheaper per token — worth considering if cost matters.
Style Comparison
Gemini 1.5 Pro uses 365.8x more bold
