Brief, mostly facts

PostHog weekly MCP leaderboard: Claude Opus 5 leads tool calls

claude-opus-5 has 47% of tool-call share. OAuth is the dominant sign-in at 86%, and execute-sql is the most used tool.

Read the source at posthog.com Discussion

What the research found

PostHog's MCP leaderboard for the week shows claude-opus-5 leading tool-call share at 47 percent, OAuth as the dominant sign-in at 86 percent, and execute-sql as the most used tool.

Claims and how well the evidence supports them

claude-opus-5 had 47.0 percent share of tool calls with a known model last week 79%
OAuth accounts for 85.8 percent of sign-ins to PostHog MCP 98%
Agents supplied the model name for 72.6 percent of calls, and 22.5 percent were not reported 99%
execute-sql is the most used MCP tool, used by 85.1 percent of users last week 98%

Evidence

posthog.com https://posthog.com/mcp/leaderboard
news.ycombinator.com https://news.ycombinator.com/item?id=50109689

Actionability rated low.