Gemini 2.5 Pro (I/O Edition) vs GPT-3.5 Turbo
Compare Gemini 2.5 Pro (I/O Edition) by Google AI against GPT-3.5 Turbo by OpenAI, tested across 40 shared challenges. Updated May 2026.
Which is better, Gemini 2.5 Pro (I/O Edition) or GPT-3.5 Turbo?
Gemini 2.5 Pro (I/O Edition) and GPT-3.5 Turbo are both competitive models. Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens vs $1.5/M for GPT-3.5 Turbo. Compare their real outputs side by side below.
Key Differences Between Gemini 2.5 Pro (I/O Edition) and GPT-3.5 Turbo
Gemini 2.5 Pro (I/O Edition) is made by google while GPT-3.5 Turbo is from openai. On pricing, Gemini 2.5 Pro (I/O Edition) costs $1.25/M input tokens vs $1.5/M for GPT-3.5 Turbo.
Per 1M tokens
Gemini 2.5 Pro (I/O Edition) wins input (1.2× cheaper)·GPT-3.5 Turbo wins output (5.0× cheaper)
No community votes yet. On paper, Gemini 2.5 Pro (I/O Edition) has the edge — bigger model tier, newer.
GPT-3.5 Turbo is 5.0x cheaper per token — worth considering if cost matters.
Style Comparison
Gemini 2.5 Pro (I/O Edition) uses 578.2x more bold
