OpenAI and Anthropic Test Each Other’s Models for Safety — An Unprecedented Competitor Collaboration

A landmark moment in 2025: OpenAI and Anthropic published joint AI safety evaluations, each testing the other’s models for alignment issues. This rare collaboration between fierce competitors signals a new era.

AI Safety - OpenAI Anthropic Collaboration

Why This Is Unprecedented:

  • Direct competitors sharing vulnerability assessments
  • Public disclosure of safety testing methodologies
  • Mutual red-teaming of flagship models
  • Joint commitment to safety standards over competitive advantage

Key Findings:

  • Claude 4 models performed strongly in resisting system-prompt extraction, slightly exceeding OpenAI’s o3
  • Anthropic expressed concern about misuse and sycophancy potential with every model except o3
  • Claude Sonnet 4.5 includes first safety evaluations using mechanistic interpretability — understanding model behavior at the level of internal representations

What This Means for the Industry:

When the two leading AI safety-focused labs collaborate on testing, it:

  • Sets a precedent for industry-wide safety standards
  • Demonstrates that safety can be pre-competitive
  • Builds public trust in AI development
  • Creates pressure for other labs to follow

“The race isn’t just to build the most capable AI — it’s to build AI that remains beneficial as capabilities grow.”


This is part of a comprehensive analysis of 20+ AI business trends for 2026. Read the full analysis on The Business Engineer.

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