THE CLAIM. the week's coding-agent launches stack neatly on DeepSWE v1.1: GPT-5.6 Terra 69.6, Grok 4.6 High 65.9, Gemini 3.7 Flash 65.3, Muse Spark 1.2 59.3. Aggregators and social posts quote these as one ranking.

THE CHECK. no shared harness produced those numbers. Google's launch chart, Meta's launch chart, and xAI's launch table each ran a same-named suite independently, and the same models land in both of the two charts that overlap. That overlap is the tell. GPT-5.6 Terra: 69.6 on Google's chart, 64.8 on Meta's. Muse Spark 1.2: 59.3 on Meta's chart, 54.9 on Google's. Roughly five points of daylight per model, and in each case the chart owner's rival scores lower on the owner's chart. As the one careful comparison in circulation puts it, cross-chart readings are 'suggestive but not proof, since it's two different labs running the same-named suite independently', or shorter: 'a shared benchmark name is not a shared benchmark'. The individual numbers are ordinary first-party launch stats. The leaderboard assembled from them is fiction with a spreadsheet aesthetic.