Claude Opus 4.6 vs Gemini 2.5 Flash Preview 05-20 (thinking)
Compare Claude Opus 4.6 by Anthropic against Gemini 2.5 Flash Preview 05-20 (thinking) by Google AI, context windows of 1.0M vs 1.0M, tested across 11 shared challenges. Updated June 2026.
Which is better, Claude Opus 4.6 or Gemini 2.5 Flash Preview 05-20 (thinking)?
Claude Opus 4.6 and Gemini 2.5 Flash Preview 05-20 (thinking) are both competitive models. Claude Opus 4.6 costs $5/M input tokens vs $0.15/M for Gemini 2.5 Flash Preview 05-20 (thinking). Context windows: 1000K vs 1049K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.6 and Gemini 2.5 Flash Preview 05-20 (thinking)
Claude Opus 4.6 is made by anthropic while Gemini 2.5 Flash Preview 05-20 (thinking) is from google. Claude Opus 4.6 has a 1000K token context window compared to Gemini 2.5 Flash Preview 05-20 (thinking)'s 1049K. On pricing, Claude Opus 4.6 costs $5/M input tokens vs $0.15/M for Gemini 2.5 Flash Preview 05-20 (thinking).
No community votes yet. On paper, Claude Opus 4.6 has the edge — bigger model tier, newer.
Gemini 2.5 Flash Preview 05-20 (thinking) is 7.1x cheaper per token — worth considering if cost matters.
Cost per 1M tokens
Gemini 2.5 Flash Preview 05-20 (thinking) is cheaper on both — 33× input, 7.1× output
Style Comparison
Claude Opus 4.6 uses 67.5x more hedging
