Gemini 1.5 Pro vs Gemini 2.5 Pro Preview 06-05
Compare Gemini 1.5 Pro and Gemini 2.5 Pro Preview 06-05, both from Google AI, context windows of 1.0M vs 1.0M, tested across 13 shared challenges. Updated June 2026.
Which is better, Gemini 1.5 Pro or Gemini 2.5 Pro Preview 06-05?
Gemini 1.5 Pro and Gemini 2.5 Pro Preview 06-05 are both competitive models. Gemini 1.5 Pro costs $3.5/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05. Context windows: 1000K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between Gemini 1.5 Pro and Gemini 2.5 Pro Preview 06-05
Gemini 1.5 Pro is made by google while Gemini 2.5 Pro Preview 06-05 is from google. Gemini 1.5 Pro has a 1000K token context window compared to Gemini 2.5 Pro Preview 06-05's 1049K. On pricing, Gemini 1.5 Pro costs $3.5/M input tokens vs $1.25/M for Gemini 2.5 Pro Preview 06-05.
Per 1M tokens
Gemini 2.5 Pro Preview 06-05 is cheaper on both — 2.8× input, 1.1× output
No community votes yet. On paper, Gemini 2.5 Pro Preview 06-05 has the edge — bigger model tier, newer.
Style Comparison
Gemini 2.5 Pro Preview 06-05 uses 12.2x more headings
