Interesting that the MCP-Atlas score for 4.6 jumped to 75.8% compared to 59.5% https://www.anthropic.com/news/claude-opus-4-6

There's other small single digit differences, but I doubt that the benchmark is that unreliable...?

page is updated to state:

MCP-Atlas: The Opus 4.6 score has been updated to reflect revised grading methodology from Scale AI.