Claude 3.7 Sonnet vs Quasar Alpha

Compare Claude 3.7 Sonnet by Anthropic against Quasar Alpha by OpenRouter, in 17 community votes, claude 3.7 sonnet wins 67% of head-to-head duels, context windows of 200K vs 1.0M, tested across 6 shared challenges. Updated February 2026.

In 17 community votes, Claude 3.7 Sonnet wins 67% of head-to-head duels. Claude 3.7 Sonnet leads in Web Design, Image Generation. Based on blind community voting from the RIVAL open dataset of 17+ human preference judgments for this pair.