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Latest results: October 29, 2026

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AI Truth Bench
  • Accuracy

    How accurate is each AI assistant?

    Tests, results and dates for every tool, with a one-word verdict.

    See all tools
    • ChatGPT logoCGIs ChatGPT accurate?Mixed
    • Gemini logoGeIs Gemini accurate?Mixed
    • Claude logoClIs Claude accurate?Mostly reliable
    • Perplexity logoPxIs Perplexity accurate?Mixed
    • Microsoft Copilot logoCoIs Microsoft Copilot accurate?Mixed
    • Grok logoGkIs Grok accurate?Unreliable
    • DeepSeek logoDSIs DeepSeek accurate?Unreliable
    • Meta AI logoMAIs Meta AI accurate?Mixed
    • Google AI Overviews logoAOAre Google AI Overviews accurate?Mixed
    Six measuring cylinders filled with dark blue liquid to different levels, one marked with a yellow band.
    FeaturedThe most accurate AI assistantsNine assistants ranked by published accuracy and hallucination results.Read the ranking
  • Rankings

    Which AI should you rely on?

    Tools ranked side by side on the same tests, with the date of each result.

    See all rankings
    • The most accurate AI assistantsAssistants ranked on factual tests
    • The best AI fact checkersRanked on what they check and what they cost
    • All rankingsEvery ranking, with its method and date
    Six measuring cylinders filled with dark blue liquid to different levels, one marked with a yellow band.
    FeaturedThe most accurate AI assistantsNine assistants ranked by published accuracy and hallucination results.Read the ranking
  • Hallucinations

    When AI makes things up

    What hallucinations are, why they happen and how often each model makes them.

    See the full guide
    • AI hallucinations, explainedWhat they are and how to spot one
    • Real AI hallucination examplesCases from courts, newsrooms and search
    • Why does AI hallucinate?The causes, in plain terms
    • Does ChatGPT make up sources?Invented citations and how to catch them
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    FeaturedAI hallucination rates by modelHow often each model states something false, with the source and test date in every row.See the rates
  • Detectors

    What does a detector score mean?

    How each AI detector performs, and what its score can and cannot tell you.

    See all detectors
    • ZeroGPT logoZGIs ZeroGPT accurate?Unreliable
    • GPTZero logoGZIs GPTZero accurate?Mostly reliable
    • Turnitin logoTuIs Turnitin's AI detector accurate?Mixed
    • Grammarly logoGrIs Grammarly's AI detector accurate?Mostly reliable
    A round analog meter with its needle in the middle of the scale, standing behind a sheet of wavy lines marked with a yellow highlight.
    FeaturedAre AI detectors accurate?What a detector score really tells you, tool by tool.Read the overview
  • Fact-check
  • How we score
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AI Truth Bench
Accuracy
  • ChatGPT logoCGIs ChatGPT accurate?
  • Gemini logoGeIs Gemini accurate?
  • Claude logoClIs Claude accurate?
  • Perplexity logoPxIs Perplexity accurate?
  • Microsoft Copilot logoCoIs Microsoft Copilot accurate?
  • Grok logoGkIs Grok accurate?
  • DeepSeek logoDSIs DeepSeek accurate?
  • Meta AI logoMAIs Meta AI accurate?
  • Google AI Overviews logoAOAre Google AI Overviews accurate?
  • See all tools
Rankings
  • The most accurate AI assistants
  • The best AI fact checkers
  • See all rankings
Hallucinations
  • AI hallucinations, explained
  • Real AI hallucination examples
  • Why does AI hallucinate?
  • AI hallucination rates by model
  • Does ChatGPT make up sources?
Detectors
  • ZeroGPT logoZGIs ZeroGPT accurate?
  • GPTZero logoGZIs GPTZero accurate?
  • Turnitin logoTuIs Turnitin's AI detector accurate?
  • Grammarly logoGrIs Grammarly's AI detector accurate?
  • Are AI detectors accurate?
Fact-check How we score

Latest results: October 29, 2026

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    Contact AI Truth Bench

    The best way to reach the AI Truth Bench editors is by email: editors@aitruthbench.com.

    Last updated October 30, 2026

    1 min read

    Contents

    1. What to send
    2. Contact the editors
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    AI Truth Bench

    AI Truth Bench shows how accurate AI assistants and AI detectors are, with the date and source behind every result.

    Accuracy

    • Is ChatGPT accurate?
    • Is Gemini accurate?
    • Is Claude accurate?
    • Is Perplexity accurate?
    • Is Microsoft Copilot accurate?
    • Is Grok accurate?
    • Is DeepSeek accurate?
    • Is Meta AI accurate?
    • Are Google AI Overviews accurate?
    • All tools

    Rankings

    • The most accurate AI assistants
    • The best AI fact checkers
    • All rankings

    Hallucinations

    • AI hallucinations, explained
    • Real AI hallucination examples
    • Why does AI hallucinate?
    • AI hallucination rates by model
    • Does ChatGPT make up sources?

    Detectors

    • Are AI detectors accurate?
    • Is ZeroGPT accurate?
    • Is GPTZero accurate?
    • Is Turnitin's AI detector accurate?
    • Is Grammarly's AI detector accurate?

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