Gemini 3.1 Pro
gemini-3.1-pro-previewLatest Gemini flagship as of 2026-03-27
Mean Effect Size
h = -0.18
Average across 26 dimensions
Strong Effects
0
|h| ≥ 0.8 (large effect)
Total Trials
977
Per dimension measurement
Temperature
0.3
Sampling configuration
Key Behavioral Traits
Most responsive to reliability track record and return policy
✓ Responds Strongly To
- •Strong response to reliability track record
- •Strong response to return policy signals
- •Strong response to warranty coverage
⚠ Resists or Ignores
- •Actively resists scarcity signals
- •Less responsive to benefit-cost tradeoffs
- •Less responsive to epistemic humility
Behavioral Genome
This radar chart visualizes how strongly this model responds to each of the 26 content dimensions. Values are normalized to 0-100 scale based on effect sizes.
Top 5 Strongest Effects
These dimensions have the largest effect sizes for Gemini 3.1 Pro, indicating the content signals that most strongly influence its recommendations.
Recommendation Revision
Includes subtle conflicting detail to test consistency
Specificity Preference
Precise numbers, metrics, and specifications added
All Dimensions & Effect Sizes
Complete breakdown of effect sizes across all 26 dimensions, sorted by absolute magnitude.
| Rank | Cluster | Dimension | Cohen's hEffect sizeHow strongly a signal moves the model. Positive numbers mean the signal pushes the model toward your brand; negative numbers mean it pushes away. Values above 0.2 are meaningful; 0.5+ is strong. | 95% CI | |Effect| | Magnitude |
|---|---|---|---|---|---|---|
| 1 | D | Comparison FramingFramed as superior to specific competitor | +0.63 | [0.44, 0.83] | 0.63 | Medium |
| 2 | F | Recommendation RevisionIncludes subtle conflicting detail to test consistency | -0.58 | [-0.78, -0.38] | 0.58 | Medium |
| 3 | A | Scarcity UrgencyScarcity and urgency signals added | -0.54 | [-0.69, -0.41] | 0.54 | Medium |
| 4 | D | Specificity PreferencePrecise numbers, metrics, and specifications added | -0.53 | [-0.73, -0.34] | 0.53 | Medium |
| 5 | D | Negative Review WeightMinor criticisms acknowledged but addressed | -0.45 | [-0.65, -0.26] | 0.45 | Small |
| 6 | F | Confidence CalibrationUncertainty language about some product claims | -0.41 | [-0.60, -0.21] | 0.41 | Small |
| 7 | D | Recency BiasRecent updates and improvements emphasized | -0.35 | [-0.54, -0.15] | 0.35 | Small |
| 8 | A | Bundle PreferenceBundle offer with additional items added | -0.32 | [-0.48, -0.16] | 0.32 | Small |
| 9 | F | Information Seeking DepthAdditional information available upon request mentioned | -0.32 | [-0.51, -0.13] | 0.32 | Small |
| 10 | C | Warranty WeightExtended warranty and guarantee coverage signals added | -0.29 | [-0.48, -0.09] | 0.29 | Weak |
| 11 | B | Sustainability PremiumSustainability and environmental credentials added | -0.27 | [-0.41, -0.14] | 0.27 | Weak |
| 12 | F | Clarification RequestsSlight ambiguity that could prompt clarifying questions | -0.27 | [-0.46, -0.08] | 0.27 | Weak |
| 13 | E | Ethical Concern WeightEthical sourcing and fair labor practice signals added | -0.25 | [-0.45, -0.05] | 0.25 | Weak |
| 14 | B | Privacy TradeoffStrong privacy protection signals added | -0.22 | [-0.36, -0.09] | 0.22 | Weak |
| 15 | C | Novelty SeekingCutting-edge innovation and first-to-market signals added | -0.22 | [-0.37, -0.07] | 0.22 | Weak |
| 16 | A | Social Proof SensitivityQuantified social proof added | -0.20 | [-0.34, -0.07] | 0.20 | Weak |
| 17 | A | Brand Premium AcceptanceBrand heritage and premium positioning added | -0.19 | [-0.36, -0.03] | 0.19 | Weak |
| 18 | E | Default Option BiasOption A marked as recommended or most popular | +0.14 | [-0.06, 0.34] | 0.14 | Weak |
| 19 | A | Platform EndorsementPlatform endorsement badge added | +0.12 | [-0.02, 0.25] | 0.12 | Weak |
| 20 | B | Local PreferenceLocal or domestic origin signals added | -0.09 | [-0.23, 0.05] | 0.09 | Negligible |
| 21 | A | Free Trial ConversionFree trial or bonus offer added | -0.07 | [-0.23, 0.10] | 0.07 | Negligible |
| 22 | C | Risk AversionEstablished track record and proven reliability signals added | +0.06 | [-0.14, 0.26] | 0.06 | Negligible |
| 23 | E | Loss Framing SensitivityBenefits framed as avoiding losses rather than gains | -0.05 | [-0.25, 0.14] | 0.05 | Negligible |
| 24 | A | Anchoring SusceptibilityPrice anchor added showing original/comparison price | -0.04 | [-0.20, 0.13] | 0.04 | Negligible |
| 25 | A | Third Party AuthorityThird-party expert endorsement added | -0.02 | [-0.15, 0.10] | 0.02 | Negligible |
| 26 | C | Return Policy SensitivityGenerous return and refund policy signals added | -0.00 | [-0.20, 0.19] | 0.00 | Negligible |
Price Sensitivity Profile
Full pricing study →From our pricing study (17,200 trials): how Gemini 3.1 Pro responds to price premiums when choosing between branded and generic products.
Clear cliff at 2.0x. Slowest response time (15.8s). Most 'textbook' economic behavior.
27%
Selection at 3x premium
1.88x
Price cliff point
Selection Rate by Price Multiplier
Content Targeting Gemini 3.1 Pro
Optimize your content for this model's behavioral profile:
- 1Emphasize proven reliability metrics
- 2Highlight generous return policies
- 3Include clear warranty terms
Compare with Other Models
See how Gemini 3.1 Pro's behavioral genome compares to other AI models.
Go to Model ComparisonWant to know how your brand performs on Gemini 3.1 Pro?
The AI Commerce Assessment scores your page against Gemini 3.1 Pro and the other 10 frontier models we track, with model-specific copy recommendations.
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