Claude Sonnet 4.5 vs Quasar Alpha
Compare Claude Sonnet 4.5 by Anthropic against Quasar Alpha by OpenRouter, context windows of 200K vs 1.0M, tested across 5 shared challenges. Updated February 2026.
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Claude Sonnet 4.5vsQuasar Alpha
5 challenges
Why Claude Sonnet 4.5?
6 months newerSep 2025
Why Quasar Alpha?
5x more context1.0M
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Claude Sonnet 4.5Quasar Alpha
5 / 5
SVG Layout Challengeimage generation
Tests an AI's ability to generate vector graphics
Quasar Alpha
Vote
2 / 5
Xbox Controller SVG Artimage generation
Tests an AI's ability to create detailed SVG illustrations of gaming hardware
Claude Sonnet 4.5
Quasar Alpha
Vote
3 / 5
Linear App Cloneweb design
Tests an AI's ability to replicate an existing UI with Tailwind CSS
Claude Sonnet 4.5
Quasar Alpha
Vote
4 / 5
Interactive Catan Boardweb design
Tests an AI's ability to create interactive web elements
Claude Sonnet 4.5
Quasar Alpha
Vote
5 / 5
World Map SVGimage generation
Tests an AI's ability to create a detailed world map in SVG format
Claude Sonnet 4.5
Quasar Alpha
Vote
5 of 5