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