Show HN: Rival – Open-source tool for visually comparing AI model responses

I built RIVAL to see how different AI models respond to the exact same one-shot prompt, side-by-side in a visual way. It lets you compare one-shot responses from models like GPT-4.5, Claude Sonnet 3.7, Grok 3, and others across different challenge types (coding, web design, SVG generation, text analysis). Features: - Interactive visual comparisons with expandable cards - Focus on the actual content, not just metrics - Subtle retro-inspired UI with clean animations - Categories for different types of AI challenges Live demo: rival.tips GitHub: https://github.com/nuance-dev/rival Feedback and contributions welcome