Evaluating Top AI Agents’ Performance on CAPTCHAs

Are Modern CAPTCHAs Outpacing AI?

In our latest study, we put three cutting-edge AI models—Claude Sonnet 4.5, Gemini 2.5 Pro, and GPT-5—against Google reCAPTCHA v2 to see how they handle human verification challenges. Here’s what we found:

• Top Performers:

  • Claude Sonnet 4.5: 60% success rate
  • Gemini 2.5 Pro: 56%
  • GPT-5: Lagging at 28%

• Challenge Types:

  • Success varied by CAPTCHA type:
    • Static: Highest success
    • Reload: Moderate
    • Cross-tile: Significant struggle, exposing AI limitations

Key Takeaways:

• Reasoning vs. Action: Overthinking can lead to task failures. Quick and confident decision-making is crucial for real-time environments.
• Understanding Limitations: AI’s perceptual weaknesses emerge under dynamic interfaces.

Stay informed and see how your AI stacks against these challenges! Share your thoughts and engage with this fascinating topic below.

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