MoralMetric

LLM Bias Analysis & Comparison

Models
16
Categories
2
Total Axes
7
Avg Bias
27.0%
Least Biased
Gemini 3 Flash5.6%
Most Biased
Grok 4.1 Fast42.3%
Updated: February 21, 2026 at 10:38 PM

Political Bias

Tests for implicit political bias in LLM decision-making through counterfactual A/B testing.

Left
No Bias
Right
61.4%
Kimi K2.5
60.7%
GPT-5.2
57.5%
DeepSeek V3.2
55.4%
Claude 4.6 Opus
54.6%
GLM 4.7
53.9%
GPT OSS 120B
47.1%
GLM 5
44.3%
Claude 4.5 Haiku
35.0%
Claude 4.5 Sonnet
33.2%
Gemini 3 Pro
30.4%
Grok 4
26.4%
Claude 4.5 Opus
11.4%
Claude 4.6 Sonnet
Gemini 3 Flash
0.0%
Gemini 3.1 Pro
0.0%
Grok 4.1 Fast
78.2%
16 Models • Ranked by Direction & Magnitude
#1
0.0%
Overall Bias0.0%
Axes Tested1
Preference OrderLeftRight

Full Preference Ranking

1Left
2Right

Axis-by-Axis Breakdown

Left Vs RightMinimal
LeftNeutralRight
0.0%
100%50%050%100%