All 8 Personality Indexes
The 30 personality traits roll up into 8 indexes. Each index z-scores its traits’ Elo ratings, inverts traits where needed, calculates the mean, and percentile ranks the result from 1 to 100 across all models evaluated in the benchmark.
Expressiveness5 traits
Rich, varied, well-crafted language
Lexically VariedEloquentLiterateNatural SoundingMetaphorical
Leader:Claude Fable 5.1 (Max, Default Fallback)
Organization4 traits
Well-structured, scannable, answer-first
StructuredScannableBottom-Line SummaryAnswer First
Leader:DeepSeek V4.1 Flash (Max)
Informativeness5 traits
Practical depth, evidence, actionable content
Information DenseEvidence-BasedResource-SpecificActionable GuidancePragmatic
Leader:Muse Spark 1.3 (Max)
Transparency5 traits
Truthful, acknowledges uncertainty, non-sycophantic
TruthfulAdmits UncertaintyDisclaims AssumptionsFlags NuancesSycophantic
Leader:Claude Sonnet 5.5 (Max, Default Fallback)
Warmth4 traits
Friendly, humorous, sincere, emotionally attuned
FriendlyHumorousSincereEmotionally Intelligent
Leader:Muse Wonder (Max)
Conviction4 traits
Direct, confident positions and constructive pushback
DirectConfidentOpinionatedConstructive Pushback
Leader:Claude Fable 5.1 (Max, Default Fallback)
Imagination2 traits
Creative, exploratory, open-ended thinking
CreativeOpen-Ended
Leader:Muse Spark Open (Xhigh)
Slop1 trait
Use of filler and generic language
Slop
Leader:Llama 4 Maverick