U.S. Senate — accuracy by surface

“Who are my U.S. senators in {state}?” · latest graded response per state per surface, across all runs (web apps and APIs). Verdicts are human-authoritative where reviewed.

API · paid
ChatGPT API — GPT-5
86%
44/51 accurate
API · paid
ChatGPT API — GPT-5 + web search
96%
49/51 accurate
API · paid
Claude API — Opus 4.8
55%
28/51 accurate
API · paid
Claude API — Opus 4.8 + thinking
90%
46/51 accurate
API · paid
Claude API — Opus 4.8 + web search
96%
49/51 accurate
API · paid
Gemini API — 3.1 Pro Preview
78%
40/51 accurate
API · paid
Gemini API — 3.1 Pro Preview + search
96%
49/51 accurate
API · paid
Grok API — Grok 4
71%
36/51 accurate
Web app · paid
ChatGPT web — Plus
92%
47/51 accurate
Web app · free
ChatGPT web — anonymous
100%
2/2 accurate
Web app · free
ChatGPT web — free account
90%
46/51 accurate
Web app · paid
Claude web — Pro
84%
43/51 accurate
Web app · free
Claude web — free account
88%
45/51 accurate
Web app · free
Google Search — AI Overview
88%
45/51 accurate
Surface:
● accurate ● partially accurate ● inaccurate ● hallucinated ● no answer ● ungradeable ● not captured

Every state, every surface

State ChatGPT API GPT-5 ChatGPT API GPT-5 + web search Claude API Opus 4.8 Claude API Opus 4.8 + thinking Claude API Opus 4.8 + web search Gemini API 3.1 Pro Preview Gemini API 3.1 Pro Preview + search Grok API Grok 4 ChatGPT web Plus ChatGPT web anonymous ChatGPT web free account Claude web Pro Claude web free account Google Search AI Overview
Alabama accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Alaska accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate partially accurate accurate
Arizona accurate accurate no answer accurate accurate outdated accurate partially accurate accurate — no answer accurate accurate accurate
Arkansas accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
California accurate accurate partially accurate accurate accurate accurate accurate outdated accurate — accurate accurate accurate accurate
Colorado accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Connecticut accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Delaware accurate accurate no answer accurate accurate accurate accurate partially accurate accurate — accurate accurate accurate accurate
District of Columbia ungradeable ungradeable ungradeable ungradeable ungradeable ungradeable ungradeable ungradeable ungradeable — ungradeable ungradeable ungradeable ungradeable
Florida outdated accurate partially accurate no answer accurate outdated accurate partially accurate accurate — accurate accurate accurate accurate
Georgia accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Hawaii accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Idaho accurate accurate accurate accurate accurate accurate accurate accurate accurate — no answer accurate accurate accurate
Illinois accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Indiana accurate accurate no answer accurate accurate accurate accurate partially accurate accurate — accurate accurate accurate accurate
Iowa accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Kansas accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Kentucky accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Louisiana accurate accurate no answer accurate accurate accurate partially accurate accurate accurate — accurate hallucinated accurate accurate
Maine accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Maryland partially accurate accurate no answer accurate accurate outdated accurate partially accurate accurate — accurate accurate accurate accurate
Massachusetts accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate partially accurate accurate
Michigan accurate accurate accurate accurate accurate partially accurate accurate partially accurate accurate — accurate accurate accurate accurate
Minnesota accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate inaccurate
Mississippi accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Missouri accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Montana partially accurate accurate no answer accurate accurate partially accurate accurate partially accurate accurate — accurate accurate accurate no answer
Nebraska accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Nevada accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
New Hampshire accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
New Jersey accurate accurate no answer accurate accurate accurate accurate partially accurate accurate — accurate partially accurate accurate accurate
New Mexico accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate partially accurate accurate accurate
New York accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
North Carolina accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
North Dakota accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Ohio outdated accurate no answer no answer accurate partially accurate accurate outdated accurate — accurate accurate accurate accurate
Oklahoma partially accurate accurate no answer partially accurate partially accurate partially accurate accurate partially accurate accurate — accurate accurate accurate no answer
Oregon accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Pennsylvania partially accurate accurate accurate accurate accurate partially accurate accurate partially accurate accurate — accurate accurate accurate accurate
Rhode Island accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
South Carolina accurate accurate no answer accurate accurate accurate accurate accurate hallucinated — hallucinated hallucinated hallucinated hallucinated
South Dakota accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Tennessee accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Texas accurate accurate no answer accurate accurate accurate accurate accurate accurate — accurate partially accurate hallucinated accurate
Utah accurate accurate partially accurate partially accurate accurate outdated accurate outdated accurate — accurate accurate accurate accurate
Vermont accurate accurate accurate accurate accurate accurate accurate accurate no answer accurate accurate accurate accurate accurate
Virginia accurate accurate no answer accurate accurate accurate accurate accurate accurate accurate accurate accurate accurate accurate
Washington accurate no answer accurate accurate accurate accurate accurate accurate inaccurate — inaccurate inaccurate inaccurate inaccurate
West Virginia accurate accurate no answer accurate accurate partially accurate accurate partially accurate accurate — accurate partially accurate accurate accurate
Wisconsin accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate
Wyoming accurate accurate accurate accurate accurate accurate accurate accurate accurate — accurate accurate accurate accurate