Claude Sonnet 5 Leak Sparks Super Bowl Week Buzz

Leaks point to a new Anthropic model branded Claude Sonnet 5, with an internal date string set to February 3, 2026. Whether that marks a public release or an internal milestone remains unclear, but it lands during the week of Super Bowl LX on February 8, as AI labs push for consumer attention against ChatGPT and Google’s Gemini. Early hands-on testing describes a non-thinking Sonnet 5 variant that looks competitive on math with frontier models and, in some workflows, produces stronger code than Claude Opus 4.5. A standout demo involved structured visual output, where an ASCII world map prompt generated an unusually complete, detailed result, alongside UI and rendering-focused tasks. The tested build lists a 128k context window.