Cypher Alpha (free) vs Claude Sonnet 4

Compare Cypher Alpha (free) by OpenRouter against Claude Sonnet 4 by Anthropic, in 42 community votes, claude sonnet 4 wins 88% of head-to-head duels, tested across 19 shared challenges. Updated February 2026.

In 42 community votes, Claude Sonnet 4 wins 88% of head-to-head duels. Claude Sonnet 4 leads in Web Design, Image Generation, Conversation. Based on blind community voting from the RIVAL open dataset of 42+ human preference judgments for this pair.

Web Design: Claude Sonnet 4 wins 79% of votes
Image Generation: Claude Sonnet 4 wins 100% of votes
Reasoning: Cypher Alpha (free) and Claude Sonnet 4 are tied
Conversation: Claude Sonnet 4 wins 100% of votes
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