Google's Gemini 4 Hydrogen comparison table lists 52.0% for Claude Sonnet 5.5 on the Multimodal Knowledge Agent (MKA) benchmark, citing the Artificial Analysis leaderboard.
Tasks: Climb WSR accuracy, as Google labels the metric.
Setting: Google says it reports the maximum thinking setting available for Sonnet 5.5, or the best available result when that is not reported; no numeric budget is stated.
Limits: Third-party report: Google, a competing model maker, published this figure for Anthropic's model in its own comparison table. Google says it developed MKA with Artificial Analysis. Google reports this result for another maker's model in its Gemini 4 Hydrogen comparison table; it was not checked against that maker's or the leaderboard's own page. Results under the same benchmark name can be shown together as reported scores, but unmatched settings and missing methods rule out a controlled ranking.
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