Compare Claude Opus 4 by Anthropic against Gemini 2.0 Flash Thinking by Google AI, context windows of 200K vs 500K, tested across 20 shared challenges. Updated April 2026.
Claude Opus 4 and Gemini 2.0 Flash Thinking are both competitive models. Claude Opus 4 costs $15/M input tokens vs $0.25/M for Gemini 2.0 Flash Thinking. Context windows: 200K vs 500K tokens. Compare their real outputs side by side below.
Claude Opus 4 is made by anthropic while Gemini 2.0 Flash Thinking is from google. Claude Opus 4 has a 200K token context window compared to Gemini 2.0 Flash Thinking's 500K. On pricing, Claude Opus 4 costs $15/M input tokens vs $0.25/M for Gemini 2.0 Flash Thinking.
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.
Claude Opus 4 uses 11.2x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

Compare Claude Opus 4 by Anthropic against Gemini 2.0 Flash Thinking by Google AI, context windows of 200K vs 500K, tested across 20 shared challenges. Updated April 2026.
Claude Opus 4 and Gemini 2.0 Flash Thinking are both competitive models. Claude Opus 4 costs $15/M input tokens vs $0.25/M for Gemini 2.0 Flash Thinking. Context windows: 200K vs 500K tokens. Compare their real outputs side by side below.
Claude Opus 4 is made by anthropic while Gemini 2.0 Flash Thinking is from google. Claude Opus 4 has a 200K token context window compared to Gemini 2.0 Flash Thinking's 500K. On pricing, Claude Opus 4 costs $15/M input tokens vs $0.25/M for Gemini 2.0 Flash Thinking.
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.
Claude Opus 4 uses 11.2x more emoji
Ask them anything yourself
Some models write identically. You are paying for the brand.
178 models fingerprinted across 32 writing dimensions. Free research.
185x
price gap between models that write identically
178
models
12
clone pairs
32
dimensions
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.

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20 fights queued
8+ more head-to-head results. Free. Not a trick.
Free account. No card required. By continuing, you agree to Rival's Terms and Privacy Policy