filipe@filicroval · 28 SEP 2026𝕏what the fuck, why is Sonnet 5.5 this good??
gave Sonnet and Opus 5.5 the exact same prompt. Sonnet came back with this masterpiece. all in a SINGLE HTML file.
Sonnet won this one, it's not even close
Sonnet 5.5 beats Opus 5.5 on a single-file HTML build
filipe@filicroval · 28 SEP 2026𝕏Claude Sonnet 5.5VSClaude Opus 5.5
OUR NOTEOne prompt, one run each. A smaller model winning a single sample is interesting, but it isn't a trend yet.
Cite
filipe (@filicroval), "Sonnet 5.5 beats Opus 5.5 on a single-file HTML build", 28 SEP 2026. Filed at llm.gallery as FR-0003. https://x.com/filicroval/status/2104681499798938034