Gemini 2.0 Flash Thinking vs Claude Opus 4

Compare Gemini 2.0 Flash Thinking by Google AI against Claude Opus 4 by Anthropic, context windows of 500K vs 200K, tested across 8 shared challenges. Updated April 2026.

Which is better, Gemini 2.0 Flash Thinking or Claude Opus 4?

Gemini 2.0 Flash Thinking and Claude Opus 4 are both competitive models. Gemini 2.0 Flash Thinking costs $0.25/M input tokens vs $15/M for Claude Opus 4. Context windows: 500K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Gemini 2.0 Flash Thinking and Claude Opus 4

Gemini 2.0 Flash Thinking is made by google while Claude Opus 4 is from anthropic. Gemini 2.0 Flash Thinking has a 500K token context window compared to Claude Opus 4's 200K. On pricing, Gemini 2.0 Flash Thinking costs $0.25/M input tokens vs $15/M for Claude Opus 4.

Our Verdict
Claude Opus 4
Claude Opus 4
Gemini 2.0 Flash Thinking
Gemini 2.0 Flash ThinkingRunner-up

No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, newer.

Gemini 2.0 Flash Thinking is 150x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
89%

Claude Opus 4 uses 11.2x more emoji

Gemini 2.0 Flash Thinking
Claude Opus 4
54%Vocabulary64%
15wSentence Length62w
0.64Hedging0.52
3.8Bold4.4
2.4Lists9.1
0.00Emoji0.11
0.03Headings1.87
0.30Transitions0.27
Based on 13 + 16 text responses
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Gemini 2.0 Flash ThinkingClaude Opus 4

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
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