Anthropic reports 82.1% for Claude Fable 5.2 on WANDR (relaxed score). Anthropic describes WANDR as Perplexity's benchmark of agents on large data-collection tasks.
Tasks: Relaxed score; agentic search.
Setting: Highest-available effort, per the table footnote; the effort level is not named for this row. Numeric reasoning and token budgets are not stated.
Limits: Provider-reported by Anthropic in its launch announcement; not independently reproduced here. Anthropic points to the Fable 5.2 and Mythos 5.2 system card for methods; that card was not opened, so task subset, sample size, harness, prompts, trial counts and run dates are unverified. Results under the same benchmark name can be shown together as reported scores, but unmatched settings and missing methods rule out a controlled ranking. Relaxed score only; do not pool with strict or other WANDR scoring.
Anthropic
