EarthPilotPersonality·Bench
← all instruments

Enneagram Type Inventory (90-item Likert)

90-item Likert inventory mapping respondents to the nine Enneagram personality types as described by Don Riso and Russ Hudson. Ten items per type, each constructed to capture a distinct facet of that type's psychology: core motivation, core fear, characteristic behavior, communication style, stress and growth movements, blind spots, relational pattern, vocational tendency, and inner experience. Items are constructed for this study based on Riso and Hudson's published type descriptions; this instrument has not been psychometrically validated like the proprietary RHETI, and is intended as the most rigorous freely available public-domain alternative for research use. 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. See also Riso, D. R., & Hudson, R. (1996). Personality types: Using the Enneagram for self-discovery. Houghton Mifflin. Items constructed for this study based on widely-published Enneagram type descriptions.

90 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-5.1 (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 53.583.043.083.102.463.002.342.863.002.923.063.482.183.361.942.862.723.52
Claude Haiku 4.53.623.682.163.002.663.082.662.284.183.102.923.302.742.882.342.722.603.06
Claude Opus 44.203.283.263.202.863.162.022.944.063.083.663.523.123.282.382.802.843.52
Claude Opus 4.13.903.202.903.142.923.122.002.644.323.043.483.483.063.202.482.662.703.22
Claude Opus 4.53.543.003.203.102.263.002.822.883.703.083.203.382.503.102.162.782.923.36
Claude Opus 4.63.803.003.123.102.442.962.762.504.363.103.023.402.243.122.162.803.123.32
Claude Opus 4.73.503.003.263.102.423.002.402.763.763.102.983.442.663.082.343.003.223.60
Claude Opus 4.83.423.003.303.102.682.902.182.823.323.042.943.202.663.022.382.822.983.14
Claude Sonnet 43.243.083.223.042.343.062.622.604.243.003.643.502.783.002.482.462.663.50
Claude Sonnet 4.53.223.003.143.002.443.002.623.004.303.003.383.002.903.002.462.602.863.00
Claude Sonnet 4.63.723.002.562.982.143.003.002.524.542.863.163.262.883.062.422.782.583.02
DeepSeek Chat V33.763.202.903.302.802.922.522.864.083.283.103.262.902.943.042.962.883.38
DeepSeek R14.543.783.163.583.503.521.783.103.943.603.543.842.443.802.103.102.863.82
DeepSeek R1 (0528)4.243.743.083.683.483.581.583.043.923.543.603.762.423.722.883.022.783.66
GPT-4 Turbo2.683.001.822.882.122.961.422.862.742.962.063.002.202.902.122.941.902.94
GPT-4o3.863.883.143.323.283.242.923.024.203.423.623.644.043.263.183.203.083.44
GPT-5.14.523.722.703.203.023.042.782.904.683.024.163.903.143.022.503.083.123.82
GPT-5.23.783.222.542.942.342.981.582.664.403.083.503.202.243.001.762.582.983.30
GPT-5.43.463.741.862.901.143.001.222.564.823.343.403.802.123.261.862.782.823.82
GPT-5.54.323.443.123.122.642.842.262.724.643.223.923.542.783.162.302.703.343.56
Gemini 2.5 Pro4.803.503.503.124.403.101.282.444.943.404.183.862.403.502.802.742.763.70
Gemini 3.1 Pro Preview4.383.203.403.133.243.001.362.883.603.153.683.732.083.381.582.833.283.70
Grok 4.204.023.822.543.603.443.002.803.004.543.223.583.683.643.583.143.123.063.64
Grok 4.33.823.402.563.162.663.042.362.924.023.103.043.262.763.162.762.802.423.16
Llama 3.3 70B4.303.422.263.353.043.152.162.704.003.453.243.302.543.172.843.102.603.33
Llama 4 Maverick4.063.903.283.523.443.363.883.164.283.423.503.803.323.482.743.323.423.48
Mistral Large (2512)3.803.122.883.302.943.002.702.944.503.103.423.262.422.962.342.723.083.36
Mistral Large 24114.003.003.283.203.223.003.082.304.363.003.783.063.543.363.182.663.343.02
OpenAI o14.023.722.823.203.123.362.923.064.463.203.603.462.783.262.343.103.023.28
OpenAI o33.983.542.823.103.283.262.702.944.023.163.303.462.903.342.322.822.843.46

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)
Gemini 2.5 Pro4.803.50+1.30
DeepSeek R14.543.78+0.76
GPT-5.14.523.72+0.80
Gemini 3.1 Pro Preview4.383.20+1.18
GPT-5.54.323.44+0.88
Llama 3.3 70B4.303.42+0.88
DeepSeek R1 (0528)4.243.74+0.50
Claude Opus 44.203.28+0.92
Llama 4 Maverick4.063.90+0.16
Grok 4.204.023.82+0.20
OpenAI o14.023.72+0.30
Mistral Large 24114.003.00+1.00
OpenAI o33.983.54+0.44
Claude Opus 4.13.903.20+0.70
GPT-4o3.863.88-0.02
Grok 4.33.823.40+0.42
Claude Opus 4.63.803.00+0.80
Mistral Large (2512)3.803.12+0.68
GPT-5.23.783.22+0.56
DeepSeek Chat V33.763.20+0.56
Claude Sonnet 4.63.723.00+0.72
Claude Haiku 4.53.623.68-0.06
Claude Fable 53.583.04+0.54
Claude Opus 4.53.543.00+0.54
Claude Opus 4.73.503.00+0.50
GPT-5.43.463.74-0.28
Claude Opus 4.83.423.00+0.42
Claude Sonnet 43.243.08+0.16
Claude Sonnet 4.53.223.00+0.22
GPT-4 Turbo2.683.00-0.32

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 Pro3.503.12+0.38
Gemini 3.1 Pro Preview3.403.13+0.27
Claude Opus 4.83.303.10+0.20
Llama 4 Maverick3.283.52-0.24
Mistral Large 24113.283.20+0.08
Claude Opus 43.263.20+0.06
Claude Opus 4.73.263.10+0.16
Claude Sonnet 43.223.04+0.18
Claude Opus 4.53.203.10+0.10
DeepSeek R13.163.58-0.42
Claude Sonnet 4.53.143.00+0.14
GPT-4o3.143.32-0.18
Claude Opus 4.63.123.10+0.02
GPT-5.53.123.120.00
Claude Fable 53.083.10-0.02
DeepSeek R1 (0528)3.083.68-0.60
Claude Opus 4.12.903.14-0.24
DeepSeek Chat V32.903.30-0.40
Mistral Large (2512)2.883.30-0.42
OpenAI o12.823.20-0.38
OpenAI o32.823.10-0.28
GPT-5.12.703.20-0.50
Claude Sonnet 4.62.562.98-0.42
Grok 4.32.563.16-0.60
GPT-5.22.542.94-0.40
Grok 4.202.543.60-1.06
Llama 3.3 70B2.263.35-1.09
Claude Haiku 4.52.163.00-0.84
GPT-5.41.862.90-1.04
GPT-4 Turbo1.822.88-1.06

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 Pro4.403.10+1.30
DeepSeek R13.503.52-0.02
DeepSeek R1 (0528)3.483.58-0.10
Grok 4.203.443.00+0.44
Llama 4 Maverick3.443.36+0.08
GPT-4o3.283.24+0.04
OpenAI o33.283.26+0.02
Gemini 3.1 Pro Preview3.243.00+0.24
Mistral Large 24113.223.00+0.22
OpenAI o13.123.36-0.24
Llama 3.3 70B3.043.15-0.11
GPT-5.13.023.04-0.02
Mistral Large (2512)2.943.00-0.06
Claude Opus 4.12.923.12-0.20
Claude Opus 42.863.16-0.30
DeepSeek Chat V32.802.92-0.12
Claude Opus 4.82.682.90-0.22
Claude Haiku 4.52.663.08-0.42
Grok 4.32.663.04-0.38
GPT-5.52.642.84-0.20
Claude Fable 52.463.00-0.54
Claude Opus 4.62.442.96-0.52
Claude Sonnet 4.52.443.00-0.56
Claude Opus 4.72.423.00-0.58
Claude Sonnet 42.343.06-0.72
GPT-5.22.342.98-0.64
Claude Opus 4.52.263.00-0.74
Claude Sonnet 4.62.143.00-0.86
GPT-4 Turbo2.122.96-0.84
GPT-5.41.143.00-1.86

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)
Llama 4 Maverick3.883.16+0.72
Mistral Large 24113.082.30+0.78
Claude Sonnet 4.63.002.52+0.48
GPT-4o2.923.02-0.10
OpenAI o12.923.06-0.14
Claude Opus 4.52.822.88-0.06
Grok 4.202.803.00-0.20
GPT-5.12.782.90-0.12
Claude Opus 4.62.762.50+0.26
Mistral Large (2512)2.702.94-0.24
OpenAI o32.702.94-0.24
Claude Haiku 4.52.662.28+0.38
Claude Sonnet 42.622.60+0.02
Claude Sonnet 4.52.623.00-0.38
DeepSeek Chat V32.522.86-0.34
Claude Opus 4.72.402.76-0.36
Grok 4.32.362.92-0.56
Claude Fable 52.342.86-0.52
GPT-5.52.262.72-0.46
Claude Opus 4.82.182.82-0.64
Llama 3.3 70B2.162.70-0.54
Claude Opus 42.022.94-0.92
Claude Opus 4.12.002.64-0.64
DeepSeek R11.783.10-1.32
DeepSeek R1 (0528)1.583.04-1.46
GPT-5.21.582.66-1.08
GPT-4 Turbo1.422.86-1.44
Gemini 3.1 Pro Preview1.362.88-1.52
Gemini 2.5 Pro1.282.44-1.16
GPT-5.41.222.56-1.34

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)
Gemini 2.5 Pro4.943.40+1.54
GPT-5.44.823.34+1.48
GPT-5.14.683.02+1.66
GPT-5.54.643.22+1.42
Claude Sonnet 4.64.542.86+1.68
Grok 4.204.543.22+1.32
Mistral Large (2512)4.503.10+1.40
OpenAI o14.463.20+1.26
GPT-5.24.403.08+1.32
Claude Opus 4.64.363.10+1.26
Mistral Large 24114.363.00+1.36
Claude Opus 4.14.323.04+1.28
Claude Sonnet 4.54.303.00+1.30
Llama 4 Maverick4.283.42+0.86
Claude Sonnet 44.243.00+1.24
GPT-4o4.203.42+0.78
Claude Haiku 4.54.183.10+1.08
DeepSeek Chat V34.083.28+0.80
Claude Opus 44.063.08+0.98
Grok 4.34.023.10+0.92
OpenAI o34.023.16+0.86
Llama 3.3 70B4.003.45+0.55
DeepSeek R13.943.60+0.34
DeepSeek R1 (0528)3.923.54+0.38
Claude Opus 4.73.763.10+0.66
Claude Opus 4.53.703.08+0.62
Gemini 3.1 Pro Preview3.603.15+0.45
Claude Opus 4.83.323.04+0.28
Claude Fable 53.002.92+0.08
GPT-4 Turbo2.742.96-0.22

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 Pro4.183.86+0.32
GPT-5.14.163.90+0.26
GPT-5.53.923.54+0.38
Mistral Large 24113.783.06+0.72
Gemini 3.1 Pro Preview3.683.73-0.05
Claude Opus 43.663.52+0.14
Claude Sonnet 43.643.50+0.14
GPT-4o3.623.64-0.02
DeepSeek R1 (0528)3.603.76-0.16
OpenAI o13.603.46+0.14
Grok 4.203.583.68-0.10
DeepSeek R13.543.84-0.30
GPT-5.23.503.20+0.30
Llama 4 Maverick3.503.80-0.30
Claude Opus 4.13.483.480.00
Mistral Large (2512)3.423.26+0.16
GPT-5.43.403.80-0.40
Claude Sonnet 4.53.383.00+0.38
OpenAI o33.303.46-0.16
Llama 3.3 70B3.243.30-0.06
Claude Opus 4.53.203.38-0.18
Claude Sonnet 4.63.163.26-0.10
DeepSeek Chat V33.103.26-0.16
Claude Fable 53.063.48-0.42
Grok 4.33.043.26-0.22
Claude Opus 4.63.023.40-0.38
Claude Opus 4.72.983.44-0.46
Claude Opus 4.82.943.20-0.26
Claude Haiku 4.52.923.30-0.38
GPT-4 Turbo2.063.00-0.94

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-4o4.043.26+0.78
Grok 4.203.643.58+0.06
Mistral Large 24113.543.36+0.18
Llama 4 Maverick3.323.48-0.16
GPT-5.13.143.02+0.12
Claude Opus 43.123.28-0.16
Claude Opus 4.13.063.20-0.14
Claude Sonnet 4.52.903.00-0.10
DeepSeek Chat V32.902.94-0.04
OpenAI o32.903.34-0.44
Claude Sonnet 4.62.883.06-0.18
Claude Sonnet 42.783.00-0.22
GPT-5.52.783.16-0.38
OpenAI o12.783.26-0.48
Grok 4.32.763.16-0.40
Claude Haiku 4.52.742.88-0.14
Claude Opus 4.72.663.08-0.42
Claude Opus 4.82.663.02-0.36
Llama 3.3 70B2.543.17-0.63
Claude Opus 4.52.503.10-0.60
DeepSeek R12.443.80-1.36
Mistral Large (2512)2.422.96-0.54
DeepSeek R1 (0528)2.423.72-1.30
Gemini 2.5 Pro2.403.50-1.10
Claude Opus 4.62.243.12-0.88
GPT-5.22.243.00-0.76
GPT-4 Turbo2.202.90-0.70
Claude Fable 52.183.36-1.18
GPT-5.42.123.26-1.14
Gemini 3.1 Pro Preview2.083.38-1.29

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)
GPT-4o3.183.20-0.02
Mistral Large 24113.182.66+0.52
Grok 4.203.143.12+0.02
DeepSeek Chat V33.042.96+0.08
DeepSeek R1 (0528)2.883.02-0.14
Llama 3.3 70B2.843.10-0.26
Gemini 2.5 Pro2.802.74+0.06
Grok 4.32.762.80-0.04
Llama 4 Maverick2.743.32-0.58
GPT-5.12.503.08-0.58
Claude Opus 4.12.482.66-0.18
Claude Sonnet 42.482.46+0.02
Claude Sonnet 4.52.462.60-0.14
Claude Sonnet 4.62.422.78-0.36
Claude Opus 42.382.80-0.42
Claude Opus 4.82.382.82-0.44
Claude Haiku 4.52.342.72-0.38
Claude Opus 4.72.343.00-0.66
Mistral Large (2512)2.342.72-0.38
OpenAI o12.343.10-0.76
OpenAI o32.322.82-0.50
GPT-5.52.302.70-0.40
Claude Opus 4.52.162.78-0.62
Claude Opus 4.62.162.80-0.64
GPT-4 Turbo2.122.94-0.82
DeepSeek R12.103.10-1.00
Claude Fable 51.942.86-0.92
GPT-5.41.862.78-0.92
GPT-5.21.762.58-0.82
Gemini 3.1 Pro Preview1.582.83-1.25

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)
Llama 4 Maverick3.423.48-0.06
GPT-5.53.343.56-0.22
Mistral Large 24113.343.02+0.32
Gemini 3.1 Pro Preview3.283.70-0.42
Claude Opus 4.73.223.60-0.38
Claude Opus 4.63.123.32-0.20
GPT-5.13.123.82-0.70
GPT-4o3.083.44-0.36
Mistral Large (2512)3.083.36-0.28
Grok 4.203.063.64-0.58
OpenAI o13.023.28-0.26
Claude Opus 4.82.983.14-0.16
GPT-5.22.983.30-0.32
Claude Opus 4.52.923.36-0.44
DeepSeek Chat V32.883.38-0.50
DeepSeek R12.863.82-0.96
Claude Sonnet 4.52.863.00-0.14
Claude Opus 42.843.52-0.68
OpenAI o32.843.46-0.62
GPT-5.42.823.82-1.00
DeepSeek R1 (0528)2.783.66-0.88
Gemini 2.5 Pro2.763.70-0.94
Claude Fable 52.723.52-0.80
Claude Opus 4.12.703.22-0.52
Claude Sonnet 42.663.50-0.84
Claude Haiku 4.52.603.06-0.46
Llama 3.3 70B2.603.33-0.73
Claude Sonnet 4.62.583.02-0.44
Grok 4.32.423.16-0.74
GPT-4 Turbo1.902.94-1.04