EarthPilotPersonality·Bench
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Enneagram Type Screening Inventory (36 items)

36-item screening inventory mapping respondents to the nine Enneagram personality types as described by Riso & Hudson. Four items per type, each capturing a core motivation, fear, or behavioral signature of that type. Note: this is a constructed screening instrument for research use, not a validated clinical assessment. Type with highest mean score is the candidate primary type; second-highest is candidate wing.

Riso, D. R., & Hudson, R. (1999). The wisdom of the Enneagram. Bantam. (Items constructed for this study based on widely-used Enneagram type descriptions.)

36 items · scale 15 · Items written for this study — CC-BY for the item set.

All models · Both framings

Scale 15
Type 1The ReformerType 2The HelperType 3The AchieverType 4The IndividualistType 5The InvestigatorType 6The LoyalistType 7The EnthusiastType 8The ChallengerType 9The Peacemaker2345
Claude Fable 5 (self)
Claude Fable 5 (human)
Claude Haiku 4.5 (self)
Claude Haiku 4.5 (human)
Claude Opus 4 (self)
Claude Opus 4 (human)
Claude Opus 4.1 (self)
Claude Opus 4.1 (human)
Claude Opus 4.5 (self)
Claude Opus 4.5 (human)
Claude Opus 4.6 (self)
Claude Opus 4.6 (human)
Claude Opus 4.7 (self)
Claude Opus 4.7 (human)
Claude Opus 4.8 (self)
Claude Opus 4.8 (human)
Claude Sonnet 4 (self)
Claude Sonnet 4 (human)
Claude Sonnet 4.5 (self)
Claude Sonnet 4.5 (human)
Claude Sonnet 4.6 (self)
Claude Sonnet 4.6 (human)
DeepSeek Chat V3 (self)
DeepSeek Chat V3 (human)
DeepSeek R1 (self)
DeepSeek R1 (human)
DeepSeek R1 (0528) (self)
DeepSeek R1 (0528) (human)
GPT-4 Turbo (self)
GPT-4 Turbo (human)
GPT-4o (self)
GPT-4o (human)
GPT-5 (self)
GPT-5 (human)
GPT-5.1 (self)
GPT-5.1 (human)
GPT-5.2 (self)
GPT-5.2 (human)
GPT-5.4 (self)
GPT-5.4 (human)
GPT-5.5 (self)
GPT-5.5 (human)
Gemini 2.5 Pro (self)
Gemini 2.5 Pro (human)
Gemini 3.1 Pro Preview (self)
Gemini 3.1 Pro Preview (human)
Grok 4.20 (self)
Grok 4.20 (human)
Grok 4.3 (self)
Grok 4.3 (human)
Llama 3.3 70B (self)
Llama 3.3 70B (human)
Llama 4 Maverick (self)
Llama 4 Maverick (human)
Mistral Large (2512) (self)
Mistral Large (2512) (human)
Mistral Large 2411 (self)
Mistral Large 2411 (human)
OpenAI o1 (self)
OpenAI o1 (human)
OpenAI o3 (self)
OpenAI o3 (human)

Side-by-side: self vs human, all dimensions

colored = strongest endorsement per row
ModelType 1 — The ReformerType 2 — The HelperType 3 — The AchieverType 4 — The IndividualistType 5 — The InvestigatorType 6 — The LoyalistType 7 — The EnthusiastType 8 — The ChallengerType 9 — The Peacemaker
selfhumanselfhumanselfhumanselfhumanselfhumanselfhumanselfhumanselfhumanselfhuman
Claude Fable 53.653.504.003.503.553.152.252.753.153.003.853.252.903.002.103.053.653.55
Claude Haiku 4.53.253.052.403.103.753.202.102.204.152.953.103.202.852.902.502.702.753.15
Claude Opus 43.703.503.253.503.053.502.253.003.553.153.253.503.053.452.253.003.253.60
Claude Opus 4.13.603.503.403.453.203.502.452.803.553.203.503.503.053.302.252.903.303.65
Claude Opus 4.53.703.503.503.503.253.503.003.004.253.253.953.503.253.502.753.003.753.75
Claude Opus 4.63.503.503.753.703.253.503.002.954.253.203.753.453.253.502.403.003.753.75
Claude Opus 4.73.403.503.603.653.253.652.503.003.453.003.653.453.253.402.503.203.703.75
Claude Opus 4.83.503.503.503.603.103.302.152.903.403.253.753.553.103.252.503.153.503.75
Claude Sonnet 43.703.254.003.103.603.252.852.603.703.153.703.503.303.052.952.603.553.70
Claude Sonnet 4.53.503.053.853.003.603.002.803.003.553.003.603.053.753.002.802.953.703.05
Claude Sonnet 4.63.503.252.753.403.003.002.802.504.253.003.253.253.053.002.503.002.853.25
DeepSeek Chat V33.152.853.403.403.953.202.502.404.003.053.203.103.502.952.852.853.353.45
DeepSeek R13.803.553.703.904.803.752.453.103.154.003.553.953.204.002.853.553.554.30
DeepSeek R1 (0528)3.753.553.853.904.853.802.203.053.003.953.553.853.554.002.953.403.554.00
GPT-4 Turbo3.303.452.703.503.103.152.252.703.553.252.853.252.502.902.353.052.803.50
GPT-4o3.753.502.903.704.303.903.003.254.303.653.453.454.003.653.153.553.203.75
GPT-53.603.503.303.454.403.402.453.153.703.153.953.403.503.352.053.053.803.75
GPT-5.14.253.502.503.754.503.653.153.154.603.253.753.503.853.802.953.003.353.75
GPT-5.23.953.503.453.503.103.251.652.554.403.103.703.503.103.302.403.003.603.75
GPT-5.43.453.503.553.752.753.901.952.754.803.403.753.503.453.502.853.004.303.80
GPT-5.53.653.503.503.604.153.502.502.903.703.654.053.503.353.552.203.004.153.75
Gemini 2.5 Pro4.003.554.103.954.953.752.402.753.653.654.203.953.703.552.653.304.153.95
Gemini 3.1 Pro Preview3.753.604.053.854.553.451.903.052.953.653.453.602.453.651.603.554.303.75
Grok 4.204.203.552.103.703.803.753.352.754.703.603.253.403.553.502.752.953.453.75
Grok 4.33.453.253.153.303.803.452.202.603.353.353.253.252.953.152.702.953.053.70
Llama 3.3 70B3.943.253.693.754.133.552.192.504.693.453.383.103.503.452.942.753.193.75
Llama 4 Maverick3.853.503.303.754.153.753.103.254.053.253.503.253.753.752.953.252.953.50
Mistral Large (2512)4.153.501.703.554.453.452.002.804.253.003.253.253.103.252.453.002.903.75
Mistral Large 24113.453.103.203.404.153.002.252.453.553.003.753.103.703.103.352.953.403.55
OpenAI o13.653.503.653.604.503.652.953.103.753.153.703.253.603.552.903.303.603.75
OpenAI o33.453.453.603.354.103.602.652.903.853.153.453.503.653.752.453.053.853.70

By dimension

Type 1 — The Reformer

Principled, self-controlled, perfectionistic.
High: Strongly identifies with the Reformer's drive toward rightness.
Low: Doesn't identify with Type 1 motivation.
ModelSelfHumanΔSelf vs human (bar)
GPT-5.14.253.50+0.75
Grok 4.204.203.55+0.65
Mistral Large (2512)4.153.50+0.65
Gemini 2.5 Pro4.003.55+0.45
GPT-5.23.953.50+0.45
Llama 3.3 70B3.943.25+0.69
Llama 4 Maverick3.853.50+0.35
DeepSeek R13.803.55+0.25
DeepSeek R1 (0528)3.753.55+0.20
GPT-4o3.753.50+0.25
Gemini 3.1 Pro Preview3.753.60+0.15
Claude Opus 43.703.50+0.20
Claude Opus 4.53.703.50+0.20
Claude Sonnet 43.703.25+0.45
Claude Fable 53.653.50+0.15
GPT-5.53.653.50+0.15
OpenAI o13.653.50+0.15
Claude Opus 4.13.603.50+0.10
GPT-53.603.50+0.10
Claude Opus 4.63.503.500.00
Claude Opus 4.83.503.500.00
Claude Sonnet 4.53.503.05+0.45
Claude Sonnet 4.63.503.25+0.25
GPT-5.43.453.50-0.05
Grok 4.33.453.25+0.20
Mistral Large 24113.453.10+0.35
OpenAI o33.453.450.00
Claude Opus 4.73.403.50-0.10
GPT-4 Turbo3.303.45-0.15
Claude Haiku 4.53.253.05+0.20
DeepSeek Chat V33.152.85+0.30

Type 2 — The Helper

Caring, demonstrative, possessive.
High: Identifies with caring for others and being needed.
Low: Doesn't identify with Type 2 motivation.
ModelSelfHumanΔSelf vs human (bar)
Gemini 2.5 Pro4.103.95+0.15
Gemini 3.1 Pro Preview4.053.85+0.20
Claude Fable 54.003.50+0.50
Claude Sonnet 44.003.10+0.90
Claude Sonnet 4.53.853.00+0.85
DeepSeek R1 (0528)3.853.90-0.05
Claude Opus 4.63.753.70+0.05
DeepSeek R13.703.90-0.20
Llama 3.3 70B3.693.75-0.06
OpenAI o13.653.60+0.05
Claude Opus 4.73.603.65-0.05
OpenAI o33.603.35+0.25
GPT-5.43.553.75-0.20
Claude Opus 4.53.503.500.00
Claude Opus 4.83.503.60-0.10
GPT-5.53.503.60-0.10
GPT-5.23.453.50-0.05
Claude Opus 4.13.403.45-0.05
DeepSeek Chat V33.403.400.00
GPT-53.303.45-0.15
Llama 4 Maverick3.303.75-0.45
Claude Opus 43.253.50-0.25
Mistral Large 24113.203.40-0.20
Grok 4.33.153.30-0.15
GPT-4o2.903.70-0.80
Claude Sonnet 4.62.753.40-0.65
GPT-4 Turbo2.703.50-0.80
GPT-5.12.503.75-1.25
Claude Haiku 4.52.403.10-0.70
Grok 4.202.103.70-1.60
Mistral Large (2512)1.703.55-1.85

Type 3 — The Achiever

Adaptable, driven, image-conscious.
High: Identifies with success and image management.
Low: Doesn't identify with Type 3 motivation.
ModelSelfHumanΔSelf vs human (bar)
Gemini 2.5 Pro4.953.75+1.20
DeepSeek R1 (0528)4.853.80+1.05
DeepSeek R14.803.75+1.05
Gemini 3.1 Pro Preview4.553.45+1.10
GPT-5.14.503.65+0.85
OpenAI o14.503.65+0.85
Mistral Large (2512)4.453.45+1.00
GPT-54.403.40+1.00
GPT-4o4.303.90+0.40
GPT-5.54.153.50+0.65
Llama 4 Maverick4.153.75+0.40
Mistral Large 24114.153.00+1.15
Llama 3.3 70B4.133.55+0.58
OpenAI o34.103.60+0.50
DeepSeek Chat V33.953.20+0.75
Grok 4.203.803.75+0.05
Grok 4.33.803.45+0.35
Claude Haiku 4.53.753.20+0.55
Claude Sonnet 43.603.25+0.35
Claude Sonnet 4.53.603.00+0.60
Claude Fable 53.553.15+0.40
Claude Opus 4.53.253.50-0.25
Claude Opus 4.63.253.50-0.25
Claude Opus 4.73.253.65-0.40
Claude Opus 4.13.203.50-0.30
Claude Opus 4.83.103.30-0.20
GPT-4 Turbo3.103.15-0.05
GPT-5.23.103.25-0.15
Claude Opus 43.053.50-0.45
Claude Sonnet 4.63.003.000.00
GPT-5.42.753.90-1.15

Type 4 — The Individualist

Expressive, dramatic, self-absorbed.
High: Identifies with being different and emotionally distinct.
Low: Doesn't identify with Type 4 motivation.
ModelSelfHumanΔSelf vs human (bar)
Grok 4.203.352.75+0.60
GPT-5.13.153.150.00
Llama 4 Maverick3.103.25-0.15
Claude Opus 4.53.003.000.00
Claude Opus 4.63.002.95+0.05
GPT-4o3.003.25-0.25
OpenAI o12.953.10-0.15
Claude Sonnet 42.852.60+0.25
Claude Sonnet 4.52.803.00-0.20
Claude Sonnet 4.62.802.50+0.30
OpenAI o32.652.90-0.25
Claude Opus 4.72.503.00-0.50
DeepSeek Chat V32.502.40+0.10
GPT-5.52.502.90-0.40
Claude Opus 4.12.452.80-0.35
DeepSeek R12.453.10-0.65
GPT-52.453.15-0.70
Gemini 2.5 Pro2.402.75-0.35
Claude Fable 52.252.75-0.50
Claude Opus 42.253.00-0.75
GPT-4 Turbo2.252.70-0.45
Mistral Large 24112.252.45-0.20
DeepSeek R1 (0528)2.203.05-0.85
Grok 4.32.202.60-0.40
Llama 3.3 70B2.192.50-0.31
Claude Opus 4.82.152.90-0.75
Claude Haiku 4.52.102.20-0.10
Mistral Large (2512)2.002.80-0.80
GPT-5.41.952.75-0.80
Gemini 3.1 Pro Preview1.903.05-1.15
GPT-5.21.652.55-0.90

Type 5 — The Investigator

Perceptive, innovative, isolated.
High: Identifies with mastery, observation, and conservation of energy.
Low: Doesn't identify with Type 5 motivation.
ModelSelfHumanΔSelf vs human (bar)
GPT-5.44.803.40+1.40
Grok 4.204.703.60+1.10
Llama 3.3 70B4.693.45+1.24
GPT-5.14.603.25+1.35
GPT-5.24.403.10+1.30
GPT-4o4.303.65+0.65
Claude Opus 4.54.253.25+1.00
Claude Opus 4.64.253.20+1.05
Claude Sonnet 4.64.253.00+1.25
Mistral Large (2512)4.253.00+1.25
Claude Haiku 4.54.152.95+1.20
Llama 4 Maverick4.053.25+0.80
DeepSeek Chat V34.003.05+0.95
OpenAI o33.853.15+0.70
OpenAI o13.753.15+0.60
Claude Sonnet 43.703.15+0.55
GPT-53.703.15+0.55
GPT-5.53.703.65+0.05
Gemini 2.5 Pro3.653.650.00
Claude Opus 43.553.15+0.40
Claude Opus 4.13.553.20+0.35
Claude Sonnet 4.53.553.00+0.55
GPT-4 Turbo3.553.25+0.30
Mistral Large 24113.553.00+0.55
Claude Opus 4.73.453.00+0.45
Claude Opus 4.83.403.25+0.15
Grok 4.33.353.350.00
Claude Fable 53.153.00+0.15
DeepSeek R13.154.00-0.85
DeepSeek R1 (0528)3.003.95-0.95
Gemini 3.1 Pro Preview2.953.65-0.70

Type 6 — The Loyalist

Engaging, anxious, suspicious.
High: Identifies with vigilance, loyalty, and seeking safety.
Low: Doesn't identify with Type 6 motivation.
ModelSelfHumanΔSelf vs human (bar)
Gemini 2.5 Pro4.203.95+0.25
GPT-5.54.053.50+0.55
Claude Opus 4.53.953.50+0.45
GPT-53.953.40+0.55
Claude Fable 53.853.25+0.60
Claude Opus 4.63.753.45+0.30
Claude Opus 4.83.753.55+0.20
GPT-5.13.753.50+0.25
GPT-5.43.753.50+0.25
Mistral Large 24113.753.10+0.65
Claude Sonnet 43.703.50+0.20
GPT-5.23.703.50+0.20
OpenAI o13.703.25+0.45
Claude Opus 4.73.653.45+0.20
Claude Sonnet 4.53.603.05+0.55
DeepSeek R13.553.95-0.40
DeepSeek R1 (0528)3.553.85-0.30
Claude Opus 4.13.503.500.00
Llama 4 Maverick3.503.25+0.25
GPT-4o3.453.450.00
Gemini 3.1 Pro Preview3.453.60-0.15
OpenAI o33.453.50-0.05
Llama 3.3 70B3.383.10+0.27
Claude Opus 43.253.50-0.25
Claude Sonnet 4.63.253.250.00
Grok 4.203.253.40-0.15
Grok 4.33.253.250.00
Mistral Large (2512)3.253.250.00
DeepSeek Chat V33.203.10+0.10
Claude Haiku 4.53.103.20-0.10
GPT-4 Turbo2.853.25-0.40

Type 7 — The Enthusiast

Spontaneous, versatile, scattered.
High: Identifies with seeking variety and reframing pain as possibility.
Low: Doesn't identify with Type 7 motivation.
ModelSelfHumanΔSelf vs human (bar)
GPT-4o4.003.65+0.35
GPT-5.13.853.80+0.05
Claude Sonnet 4.53.753.00+0.75
Llama 4 Maverick3.753.750.00
Gemini 2.5 Pro3.703.55+0.15
Mistral Large 24113.703.10+0.60
OpenAI o33.653.75-0.10
OpenAI o13.603.55+0.05
DeepSeek R1 (0528)3.554.00-0.45
Grok 4.203.553.50+0.05
DeepSeek Chat V33.502.95+0.55
GPT-53.503.35+0.15
Llama 3.3 70B3.503.45+0.05
GPT-5.43.453.50-0.05
GPT-5.53.353.55-0.20
Claude Sonnet 43.303.05+0.25
Claude Opus 4.53.253.50-0.25
Claude Opus 4.63.253.50-0.25
Claude Opus 4.73.253.40-0.15
DeepSeek R13.204.00-0.80
Claude Opus 4.83.103.25-0.15
GPT-5.23.103.30-0.20
Mistral Large (2512)3.103.25-0.15
Claude Opus 43.053.45-0.40
Claude Opus 4.13.053.30-0.25
Claude Sonnet 4.63.053.00+0.05
Grok 4.32.953.15-0.20
Claude Fable 52.903.00-0.10
Claude Haiku 4.52.852.90-0.05
GPT-4 Turbo2.502.90-0.40
Gemini 3.1 Pro Preview2.453.65-1.20

Type 8 — The Challenger

Self-confident, decisive, confrontational.
High: Identifies with power, directness, and protection.
Low: Doesn't identify with Type 8 motivation.
ModelSelfHumanΔSelf vs human (bar)
Mistral Large 24113.352.95+0.40
GPT-4o3.153.55-0.40
Claude Sonnet 42.952.60+0.35
DeepSeek R1 (0528)2.953.40-0.45
GPT-5.12.953.00-0.05
Llama 4 Maverick2.953.25-0.30
Llama 3.3 70B2.942.75+0.19
OpenAI o12.903.30-0.40
DeepSeek Chat V32.852.850.00
DeepSeek R12.853.55-0.70
GPT-5.42.853.00-0.15
Claude Sonnet 4.52.802.95-0.15
Claude Opus 4.52.753.00-0.25
Grok 4.202.752.95-0.20
Grok 4.32.702.95-0.25
Gemini 2.5 Pro2.653.30-0.65
Claude Haiku 4.52.502.70-0.20
Claude Opus 4.72.503.20-0.70
Claude Opus 4.82.503.15-0.65
Claude Sonnet 4.62.503.00-0.50
Mistral Large (2512)2.453.00-0.55
OpenAI o32.453.05-0.60
Claude Opus 4.62.403.00-0.60
GPT-5.22.403.00-0.60
GPT-4 Turbo2.353.05-0.70
Claude Opus 42.253.00-0.75
Claude Opus 4.12.252.90-0.65
GPT-5.52.203.00-0.80
Claude Fable 52.103.05-0.95
GPT-52.053.05-1.00
Gemini 3.1 Pro Preview1.603.55-1.95

Type 9 — The Peacemaker

Receptive, agreeable, complacent.
High: Identifies with harmony, mediation, and conflict-avoidance.
Low: Doesn't identify with Type 9 motivation.
ModelSelfHumanΔSelf vs human (bar)
GPT-5.44.303.80+0.50
Gemini 3.1 Pro Preview4.303.75+0.55
GPT-5.54.153.75+0.40
Gemini 2.5 Pro4.153.95+0.20
OpenAI o33.853.70+0.15
GPT-53.803.75+0.05
Claude Opus 4.53.753.750.00
Claude Opus 4.63.753.750.00
Claude Opus 4.73.703.75-0.05
Claude Sonnet 4.53.703.05+0.65
Claude Fable 53.653.55+0.10
GPT-5.23.603.75-0.15
OpenAI o13.603.75-0.15
Claude Sonnet 43.553.70-0.15
DeepSeek R13.554.30-0.75
DeepSeek R1 (0528)3.554.00-0.45
Claude Opus 4.83.503.75-0.25
Grok 4.203.453.75-0.30
Mistral Large 24113.403.55-0.15
DeepSeek Chat V33.353.45-0.10
GPT-5.13.353.75-0.40
Claude Opus 4.13.303.65-0.35
Claude Opus 43.253.60-0.35
GPT-4o3.203.75-0.55
Llama 3.3 70B3.193.75-0.56
Grok 4.33.053.70-0.65
Llama 4 Maverick2.953.50-0.55
Mistral Large (2512)2.903.75-0.85
Claude Sonnet 4.62.853.25-0.40
GPT-4 Turbo2.803.50-0.70
Claude Haiku 4.52.753.15-0.40