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

A landmark moment in 2025: OpenAI — as explored in the intelligence factory race between AI labs — 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.

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.